Compound Eye, Arthropod
Photoreceptor Cells, Invertebrate
Ocular Physiological Phenomena
Optic Lobe, Nonmammalian
Molecular Sequence Data
Gene Expression Regulation, Developmental
Optics and Photonics
Dry Eye Syndromes
Amino Acid Sequence
Microscopy, Electron, Scanning
Animals, Genetically Modified
Volatile Organic Compounds
Eye Protective Devices
Dissecting Nck/Dock signaling pathways in Drosophila visual system. (1/111)The establishment of neuronal connections during embryonic development requires the precise guidance and targeting of the neuronal growth cone, an expanded cellular structure at the leading tip of a growing axon. The growth cone contains sophisticated signaling systems that allow the rapid communication between guidance receptors and the actin cytoskeleton in generating directed motility. Previous studies demonstrated a specific role for the Nck/Dock SH2/SH3 adapter protein in photoreceptor (R cell) axon guidance and target recognition in the Drosophila visual system, suggesting strongly that Nck/Dock is one of the long-sought missing links between cell surface receptors and the actin cytoskeleton. In this review, I discuss the recent progress on dissecting the Nck/Dock signaling pathways in R-cell growth cones. These studies have identified additional key components of the Nck/Dock signaling pathways for linking the receptor signaling to the remodeling of the actin cytoskeleton in controlling growth-cone motility. (+info)
Genetic dissection of the photoreceptor system in the compound eye of Drosophila melanogaster. (2/111)Three mutations which eliminate specific types of photoreceptors in Drosophila were characterized. Of the eight photoreceptors in each facet, two mutations delete the outer six (R 1-6). The third eliminates R 7, one of the two central photoreceptors. Double mutants can be constructed in which only photoreceptor R 8 is present. The spectral sensitivities, photopigments, and behavioural properties of these mutants were investigated. R 1-6 have two sensitivity peaks, near 350 and 470 nm. These receptors contain a rhodopsin with these absorption peaks. It interconverts with a metarhodopsin that absorbs around 570 nm. R 7 is a U.V.-receptor, containing rhodopsin that absorbs around 370 nm and interconverts with a metarhodopsin which absorbs around 470 nm. R 8 is a non-adapting blue-receptor with a third type of rhodopsin. The properties of these photopigments explain the different sensitivities and spectral adaptation phenomena of the various photoreceptors. All the photoreceptors have input into phototaxis. Spectral analysis of this behaviour provides evidence for integration of the input from the different photoreceptors. (+info)
Eye development under the control of SRp55/B52-mediated alternative splicing of eyeless. (3/111)The genetic programs specifying eye development are highly conserved during evolution and involve the vertebrate Pax-6 gene and its Drosophila melanogaster homolog eyeless (ey). Here we report that the SR protein B52/SRp55 controls a novel developmentally regulated splicing event of eyeless that is crucial for eye growth and specification in Drosophila. B52/SRp55 generates two isoforms of eyeless differing by an alternative exon encoding a 60-amino-acid insert at the beginning of the paired domain. The long isoform has impaired ability to trigger formation of ectopic eyes and to bind efficiently Eyeless target DNA sequences in vitro. When over-produced in the eye imaginal disc, this isoform induces a small eye phenotype, whereas the isoform lacking the alternative exon triggers eye over-growth and strong disorganization. Our results suggest that B52/SRp55 splicing activity is used during normal eye development to control eye organogenesis and size through regulation of eyeless alternative splicing. (+info)
Mutation of the Apc1 homologue shattered disrupts normal eye development by disrupting G1 cell cycle arrest and progression through mitosis. (4/111)The shattered1 (shtd1) mutation disrupts Drosophila compound eye structure. In this report, we show that the shtd1 eye defects are due to a failure to establish and maintain G1 arrest in the morphogenetic furrow (MF) and a defect in progression through mitosis. The observed cell cycle defects were correlated with an accumulation of cyclin A (CycA) and String (Stg) proteins near the MF. Interestingly, the failure to maintain G1 arrest in the MF led to the specification of R8 photoreceptor cells that undergo mitosis, generating R8 doublets in shtd1 mutant eye discs. We demonstrate that shtd encodes Apc1, the largest subunit of the anaphase-promoting complex/cyclosome (APC/C). Furthermore, we show that reducing the dosage of either CycA or stg suppressed the shtd1 phenotype. While reducing the dosage of CycA is more effective in suppressing the premature S phase entry in the MF, reducing the dosage of stg is more effective in suppressing the progression through mitosis defect. These results indicate the importance of not only G1 arrest in the MF but also appropriate progression through mitosis for normal eye development during photoreceptor differentiation. (+info)
Identification of transcriptional targets of the dual-function transcription factor/phosphatase eyes absent. (5/111)Drosophila eye specification and development relies on a collection of transcription factors termed the retinal determination gene network (RDGN). Two members of this network, Eyes absent (EYA) and Sine oculis (SO), form a transcriptional complex in which EYA provides the transactivation function while SO provides the DNA binding activity. EYA also functions as a protein tyrosine phosphatase, raising the question of whether transcriptional output is dependent or independent of phosphatase activity. To explore this, we used microarrays together with binding site analysis, quantitative real-time PCR, chromatin immunoprecipitation, genetics and in vivo expression analysis to identify new EYA-SO targets. In parallel, we examined the expression profiles of tissue expressing phosphatase mutant eya and found that reducing phosphatase activity did not globally impair transcriptional output. Among the targets identified by our analysis was the cell cycle regulatory gene, string (stg), suggesting that EYA and SO may influence cell proliferation through transcriptional regulation of stg. Future investigation into the regulation of stg and other EYA-SO targets identified in this study will help elucidate the transcriptional circuitries whereby output from the RDGN integrates with other signaling inputs to coordinate retinal development. (+info)
A new allele uncovers the role of echinus in the control of ommatidial rotation in the Drosophila eye. (6/111)The precise orientation of the ommatidia in the Drosophila eye is achieved through a specialized process of cell migration taking place in the third-instar eye imaginal disc when ommatidial clusters rotate by 90 degrees. This process is strictly coordinated with the establishment of planar cell polarity (PCP), but it relies on a specific set of genes that control its mechanism independently from PCP signaling. Recently, the epidermal growth factor receptor (EGFR) pathway has been implicated in determining ommatidial rotation. We have isolated a new allele of echinus, a gene known to control the patterning and number of interommatidial cells. We show that echinus displays defects in the rotation of ommatidia that are not evident until mid-pupal stages, and we propose that echinus action is that of opposing EGFR by an unknown mechanism and that this can explain both its influence in ommatidial rotation and lattice programmed cell death (PCD). (+info)
Gene-specific targeting of the histone chaperone asf1 to mediate silencing. (7/111)The histone chaperone Asf1 assists in chromatin assembly and remodeling during replication, transcription activation, and gene silencing. However, it has been unclear to what extent Asf1 could be targeted to specific loci via interactions with sequence-specific DNA-binding proteins. Here, we show that Asf1 contributes to the repression of Notch target genes, as depletion of Asf1 in cells by RNAi causes derepression of the E(spl) Notch-inducible genes. Conversely, overexpression of Asf1 in vivo results in decreased expression of target genes and produces phenotypes that are strongly modified (enhanced and suppressed) by mutations affecting the Notch pathway, but not by mutations in other signaling pathways. Asf1 can be coprecipitated with the DNA-binding protein Su(H) and the corepressor Hairless and interacts directly with two components of this complex, Hairless and SKIP. Thus, in addition to playing more general roles in chromatin dynamics, Asf1 is directed via interactions with sequence-specific complexes to mediate silencing of specific target genes. (+info)
Myosin II regulates complex cellular arrangement and epithelial architecture in Drosophila. (8/111)Remodeling epithelia is a primary driver of morphogenesis. Here, we report a central role of myosin II in regulating several aspects of complex epithelial architecture in the Drosophila eye imaginal disc. The epithelial indentation of the morphogenetic furrow is established from a pattern of myosin II activation defined by the developmental signals Hedgehog and Decapentaplegic. More generally, patterned myosin activation can control diverse three-dimensional epithelial sculpting. We have developed a technique to image eye disc development in real time, and we show that myosin II also regulates higher-order organization of cells in the plane of the epithelium. This includes the clustering of cells into ommatidial units and their subsequent coordinated rotation. This later clustering function of myosin II depends on EGF receptor signaling. Our work implies that regulation of the actomyosin cytoskeleton can control morphogenesis by regulating both individual cell shapes and their complex two-dimensional arrangement within epithelia. (+info)
There are many different types of eye diseases, including:
1. Cataracts: A clouding of the lens in the eye that can cause blurry vision and blindness.
2. Glaucoma: A group of diseases that damage the optic nerve and can lead to vision loss and blindness.
3. Age-related macular degeneration (AMD): A condition that causes vision loss in older adults due to damage to the macula, the part of the retina responsible for central vision.
4. Diabetic retinopathy: A complication of diabetes that can cause damage to the blood vessels in the retina and lead to vision loss.
5. Detached retina: A condition where the retina becomes separated from the underlying tissue, leading to vision loss.
6. Macular hole: A small hole in the macula that can cause vision loss.
7. Amblyopia (lazy eye): A condition where one eye is weaker than the other and has reduced vision.
8. Strabismus (crossed eyes): A condition where the eyes are not aligned properly and point in different directions.
9. Conjunctivitis: An inflammation of the conjunctiva, the thin membrane that covers the white part of the eye and the inside of the eyelids.
10. Dry eye syndrome: A condition where the eyes do not produce enough tears, leading to dryness, itchiness, and irritation.
Eye diseases can be caused by a variety of factors, including genetics, age, environmental factors, and certain medical conditions. Some eye diseases are inherited, while others are acquired through lifestyle choices or medical conditions.
Symptoms of eye diseases can include blurry vision, double vision, eye pain, sensitivity to light, and redness or inflammation in the eye. Treatment options for eye diseases depend on the specific condition and can range from medication, surgery, or lifestyle changes.
Regular eye exams are important for detecting and managing eye diseases, as many conditions can be treated more effectively if caught early. If you experience any symptoms of eye disease or have concerns about your vision, it is important to see an eye doctor as soon as possible.
There are several types of dry eye syndromes, including:
1. Dry eye disease (DED): This is the most common type of dry eye syndrome and is characterized by a deficiency in the tear film that covers the surface of the eye. It can be caused by a variety of factors such as aging, hormonal changes, medications, and environmental conditions.
2. Meibomian gland dysfunction (MGD): This type of dry eye syndrome is caused by problems with the meibomian glands, which are located in the eyelids and produce the fatty layer of the tear film. MGD can be caused by inflammation, blockages, or other issues that prevent the glands from functioning properly.
3. Aqueous deficient dry eye (ADDE): This type of dry eye syndrome is caused by a lack of the aqueous layer of the tear film, which is produced by the lacrimal gland. It can be caused by surgical removal of the lacrimal gland, injury to the gland, or other conditions that affect its function.
4. Evaporative dry eye (EDE): This type of dry eye syndrome is caused by a problem with the meibomian glands and the lipid layer of the tear film. It can be caused by inflammation, blockages, or other issues that prevent the glands from functioning properly.
5. Contact lens-related dry eye (CLDE): This type of dry eye syndrome is caused by wearing contact lenses, which can disrupt the natural tear film and cause dryness and irritation.
6. Sjögren's syndrome: This is an autoimmune disorder that affects the glands that produce tears and saliva, leading to dry eye syndrome and other symptoms.
7. Medications: Certain medications, such as antihistamines, decongestants, and blood pressure medications, can reduce tear production and lead to dry eye syndrome.
8. Hormonal changes: Changes in hormone levels, such as during menopause or pregnancy, can lead to dry eye syndrome.
9. Environmental factors: Dry air, smoke, wind, and dry climates can all contribute to dry eye syndrome.
10. Nutritional deficiencies: A lack of omega-3 fatty acids in the diet has been linked to an increased risk of dry eye syndrome.
It is important to note that dry eye syndrome can be a complex condition and may involve multiple factors. A comprehensive diagnosis from an eye doctor or other healthcare professional is necessary to determine the underlying cause and develop an effective treatment plan.
Some common types of eye abnormalities include:
1. Refractive errors: These are errors in the way the eye focuses light, causing blurry vision. Examples include myopia (nearsightedness), hyperopia (farsightedness), astigmatism, and presbyopia (age-related loss of near vision).
2. Amblyopia: This is a condition where the brain favors one eye over the other, causing poor vision in the weaker eye.
3. Cataracts: A cataract is a clouding of the lens in the eye that can cause blurry vision and increase the risk of glaucoma.
4. Glaucoma: This is a group of eye conditions that can damage the optic nerve and lead to vision loss.
5. Macular degeneration: This is a condition where the macula, the part of the retina responsible for central vision, deteriorates, leading to vision loss.
6. Diabetic retinopathy: This is a complication of diabetes that can damage the blood vessels in the retina and lead to vision loss.
7. Retinal detachment: This is a condition where the retina becomes separated from the underlying tissue, leading to vision loss.
8. Corneal abnormalities: These are irregularities in the shape or structure of the cornea, such as keratoconus, that can cause blurry vision.
9. Optic nerve disorders: These are conditions that affect the optic nerve, such as optic neuritis, that can cause vision loss.
10. Traumatic eye injuries: These are injuries to the eye or surrounding tissue that can cause vision loss or other eye abnormalities.
Eye abnormalities can be diagnosed through a comprehensive eye exam, which may include visual acuity tests, refraction tests, and imaging tests such as retinal photography or optical coherence tomography (OCT). Treatment for eye abnormalities depends on the specific condition and may include glasses or contact lenses, medication, surgery, or other therapies.
There are several types of eye burns, including:
1. Chemical burns: These occur when the eye comes into contact with a corrosive substance, such as bleach or drain cleaner.
2. Thermal burns: These occur when the eye is exposed to heat or flames, such as from a fire or a hot surface.
3. Ultraviolet (UV) burns: These occur when the eye is exposed to UV radiation, such as from the sun or a tanning bed.
4. Radiation burns: These occur when the eye is exposed to ionizing radiation, such as from a nuclear accident or cancer treatment.
Symptoms of eye burns can include:
* Pain and redness in the eye
* Discharge or crusting around the eye
* Blurred vision or sensitivity to light
* Swelling of the eyelids or the surface of the eye
* Increased tearing or dryness
Treatment for eye burns depends on the cause and severity of the injury. Mild cases may require only topical medications, such as antibiotic ointments or anti-inflammatory drops. More severe cases may require more aggressive treatment, such as oral medications, patching, or even surgery. In some cases, eye burns can lead to long-term vision problems or scarring, so it is important to seek medical attention if symptoms persist or worsen over time.
Some common types of eye neoplasms include:
1. Uveal melanoma: This is a malignant tumor that develops in the uvea, the middle layer of the eye. It is the most common primary intraocular cancer in adults and can spread to other parts of the body if left untreated.
2. Retinoblastoma: This is a rare type of cancer that affects children and develops in the retina. It is usually diagnosed before the age of 5 and is highly treatable with surgery, chemotherapy, and radiation therapy.
3. Conjunctival melanoma: This is a malignant tumor that develops in the conjunctiva, the thin membrane that covers the white part of the eye. It is more common in older adults and can be treated with surgery and/or radiation therapy.
4. Ocular sarcomas: These are rare types of cancer that develop in the eye tissues, including the retina, optic nerve, and uvea. They can be benign or malignant and may require surgical removal or radiation therapy.
5. Secondary intraocular tumors: These are tumors that metastasize (spread) to the eye from other parts of the body, such as breast cancer or lung cancer.
The symptoms of eye neoplasms can vary depending on their location and type, but may include:
* Blurred vision
* Eye pain or discomfort
* Redness or inflammation in the eye
* Sensitivity to light
* Floaters (specks or cobwebs in vision)
* Flashes of light
* Abnormal pupil size or shape
Early detection and treatment of eye neoplasms are important to preserve vision and prevent complications. Diagnosis is typically made through a combination of physical examination, imaging tests such as ultrasound or MRI, and biopsy (removing a small sample of tissue for examination under a microscope). Treatment options may include:
* Surgery to remove the tumor
* Radiation therapy to kill cancer cells
* Chemotherapy to destroy cancer cells with medication
* Observation and monitoring if the tumor is slow-growing or benign
It's important to seek medical attention if you experience any unusual symptoms in your eye, as early detection and treatment can improve outcomes.
2020 in arthropod paleontology
Cephalon (arthropod head)
2021 in arthropod paleontology
2019 in arthropod paleontology
2017 in arthropod paleontology
Evolution of nervous systems
Atlantic horseshoe crab
Simple eye in invertebrates
Atlantic ghost crab
Glossary of ant terms
Comparison of butterflies and moths
Innate immune system
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- They developed another type of lens inspired by the compound eyes of insects and other arthropods. (nih.gov)
- Entomology is the study of insects, which are organisms that have an exoskeleton, six legs, three body segments, one pair of antenna, and one pair of compound eyes. (medscape.com)
- The field of forensic entomology is broadly defined as the application of the scientific study of insects and their arthropod relatives to legal matters. (medscape.com)
- Crustaceans are invertebrates (they lack a backbone) and arthropods (which also includes the insects ). (enchantedlearning.com)
- What type of eyes do most insects have? (imago-education.com)
- There are other groups of arthropods, which are the insects, chelicerates, and myriapods, that have very different characteristics than the crustaceans. (animalsake.com)
- The arthropods are named for their jointed legs, and they are a dominant group on this planet, with two principle subgroups-the insects and the crustaceans-filling terrestrial and aquatic habitats worldwide. (tfhmagazine.com)
- While crustaceans are the dominant group of arthropods in marine environments, hexapods, including insects, rule the land. (tolweb.org)
- Hexapods include three orders of wingless arthropods (Collembola, Protura, Diplura), as well as the insects. (tolweb.org)
- Arthropod Phylogeny with Special Reference to Insects. (tolweb.org)
- These specialized structures also seem to create opportunities for some arthropods: with their tracheal system for gas exchange and their Malphigian tubules for osmoregulation, the insects are able to live in dry conditions that would kill most invertebrates. (brianmccauley.net)
- In this lab, we'll just consider a few of the most prominent arthropod groups, and then look at insects in more detail. (brianmccauley.net)
Groups of arthropods1
- When later groups of arthropods moved onto the land, it turned out that the exoskeleton happened to be very functional in preventing the body from drying out. (brianmccauley.net)
- 1] Forensic entomologists frequently deal with non-insect arthropods such as spiders, mites, and ticks. (medscape.com)
- Permethrin-treated clothing repels and kills ticks, mosquitoes, and other arthropods and retains this effect after repeated laundering. (luxseattle.com)
- Children traveling to areas with arboviruses should use the same mosquito protection measures described elsewhere in this chapter (also see Sec. 4, Ch. 6, Mosquitoes, Ticks & Other Arthropods ). (cdc.gov)
- Among them are ticks, which are small bloodsucking parasites and arthropods. (medlineplus.gov)
- arthropod - an invertebrate animal of the large phylum Arthropoda , that has an exoskeleton and several pairs of jointed legs, such as an insect, spider, or crustacean. (imago-education.com)
- exoskeleton - a rigid external covering for the body in some invertebrate animals, especially arthropods, providing both support and protection. (imago-education.com)
- Arthropods are fitted with a variety of jointed, double-branched appendages and are encased in a nonliving exoskeleton. (tfhmagazine.com)
- Arthropod bodies are covered with a cuticle made of chitin, forming an exoskeleton have exoskeletons made of chitin (the same complex carbohydrate found in fungal cell walls) and protein. (brianmccauley.net)
- In some arthropods (such as crabs), the exoskeleton is made more rigid with calcium deposition. (brianmccauley.net)
- 2002. Molecular phylogenetic evidence for the independent evolutionary origin of an arthropod compound eye . (ucsb.edu)
- In this lesson, you will explore a very successful phylum - the phylum arthropods. (imago-education.com)
- Read the section Phylum arthropods in the Coursebook - p. 11-12. (imago-education.com)
- Note that each of these are classes of the phylum Arthropod). (imago-education.com)
- What are the two main characteristics of all members of the phylum arthropods? (imago-education.com)
- Copy and complete the following table which compares the different classes under the phylum arthropods. (imago-education.com)
- abdomen - the posterior part of the body of an arthropod, especially the segments of an insect's body behind the thorax. (imago-education.com)
- The primitive arthropod body plan is characterized by a repetitive, linear succession of body sections (somites), which are often connected or fused to form specialized structures: a clearly defined cephalon (head), a thorax (midsection), and an abdomen (hindsection). (tfhmagazine.com)
Pair of compound eyes2
- Insect eyes comprise thousands of individual microlenses that each point in different directions to capture a specific part of a scene. (nih.gov)
- Shrimp, crabs, and crayfish are all arthropods or jointed-leg animals. (tfhmagazine.com)
- Light sensory organ in ARTHROPODS consisting of a large number of ommatidia, each functioning as an independent photoreceptor unit. (nih.gov)
- A honey bee has around 5.500 ommatidia per eye. (interestingwiki.com)
- Like annelid worms, arthropods are strongly segmented, but unlike the annelids, the segmentation does not divide the body into separate compartments. (brianmccauley.net)
- 2004. Phylogenetic relationships of basal hexapods among the mandibulate arthropods: a cladistics analysis based on comparative morphological characters. (tolweb.org)
Pairs of legs1
- This is in contrast to other arthropods, most of which have more than three pairs of legs. (tolweb.org)
- The coconut crab is the largest terrestrial arthropod in the world. (joewongcomedy.com)
- an almost round, flattened body, with lateral expansions on the prothorax, prominent compound eyes, and lack of functional wings. (cdc.gov)
- This study contributes to a growing body of evidence that more comprehensive testing of xenobiotics may be required before novel or existing compounds can be considered safe for honey bees and other non-target species. (bvsalud.org)
- Despite their simple eye structure and small brain, honey bees could recognize individual human faces. (interestingwiki.com)
- This gene is expressed in the developing compound eye of the honey bee. (illinois.edu)
- Arthropods are clearly segmented, and the different segments are very different from one another in form and function. (brianmccauley.net)
- A combination of compounds in a tick's saliva stops human blood from clotting while the tick feeds. (medlineplus.gov)
- Diving beetles possess compound eyes which contain thousands of individual photoreceptor units that collectively make up the eye. (asia-qatar.com)
- It is a trilobite, which belong to a group of arthropods that became extinct about 251 million years ago. (smithsonianmag.com)
- Often, derivitization is used to create a sensitive group for pyrethroids that do not possess halogenated atoms (allethrin, resmethrin, phenothrin, and tetramethrin, for example), or to improve the sensitivity and peak tailing Six individual chemicals have active insecticidal properties in the pyrethrum extract, and these compounds are called pyrethrins. (luxseattle.com)
- Arthropods are animals with jointed legs. (imago-education.com)
- The ten-layered nervous tissue membrane of the eye. (lookformedical.com)
- The human nervous system can be observed both with gross anatomy , (which describes the parts that are large enough to be seen with the plain eye,) and microanatomy , (which describes the system at a cellular level. (wikidoc.org)
- Making the most of the low light in the muddy rivers where it swims, the elephant nose fish survives by being able to spot predators amongst the muck with a uniquely shaped retina, the part of the eye that captures light. (nih.gov)
- There are at least a million arthropod species, accounting for over 80% of known animal species. (brianmccauley.net)
- Proturans are very small, pale arthropods that are rarely encountered. (tolweb.org)
- Resmethrin represented the first compound that had an A blue mark has formed on ceiling cornice in a small bathroom as a result of using a device plugged in the wall power outlet containing a blue strip (brand name Mortein odourless mozzie zapper). (luxseattle.com)
- Adjustment of the eyes under conditions of low light. (lookformedical.com)
- NIH-funded researchers identified a set of 10 compounds in the blood that might be used to distinguish older adults at risk for developing memory deficits or Alzheimer's disease. (nih.gov)
- Researchers at the National Institutes of Health are studying the saliva of arthropods to see if there is a way to create a vaccine that will affect the saliva. (medlineplus.gov)
- HN - 2008(2004) BX - Acetogenin Compounds MH - Acridones UI - D054831 MN - D3.132.32 MN - D3.494.46.109 MS - Compounds based on acridone, which have three linear rings, with the center ring containing a ring nitrogen and a keto oxygen opposite to each other. (nih.gov)
- HN - 2020 MH - Acyclic Monoterpenes UI - D000080462 MN - D2.455.849.575.125 MS - Linear compounds that contain a single monoterpene unit. (nih.gov)
- They include designing the lens, algorithm-driven sensors, and miniature electronic circuits that adjust the shape of the lens, plus creating a power source - all embedded within a soft, flexible material that fits over the eye. (nih.gov)
- HN - 2020 (1980) BX - Formalinized Allergoid BX - Formalized Allergoid BX - High Molecular Weight Allergoid FX - Desensitization, Immunologic MH - Allylbenzene Derivatives UI - D000081248 MN - D2.455.326.271.122.180 MN - D2.455.426.559.389.12 MS - Compounds that include a single 1-phenyl-2-propene moiety in their structure. (nih.gov)
- The sensitivity of the eye to light is increased during dark adaptation. (lookformedical.com)
- The compound eyes of trilobites were important in predator detection and spines probably evolved to keep the predators from attacking. (smithsonianmag.com)
- The majority develop compound eyes by adulthood. (tfhmagazine.com)
- A common misconception is that they are not visible to the naked eye. (jopestkil.com)
- Many arthropods go through multiple molts in their life cycle. (brianmccauley.net)