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What physical feature is found on most free-living insects, including free living lice, that is absent on
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- what is the common adaptation in many nematodes enabling them to survive adverse conditions while awaiting return of more congenial circumstances.What are various podomeres that make walking legs of the insects? Explain brieflyWhat is one of the main characteristics distinguishing arachnids from insects?
- How is the division of body of the insect?What type of symmetry is seen in the roundworm? Does it exhibit cephalization? Ascaris is a parasite that swims constantly in human intestines. What structure protects the nematode from being digested? View the Trichinella slide. Trichinella is also a parasite. It can infect humans as well as other mammals like pigs, bears, and rodents. If untreated, it can lead to death.What mammal tissue does this roundworm infect?Draw a picture below of the Trichinella as viewed under the microscope. Although not mentioned on the website, if available view the live vinegar eel specimens. If there are no live specimens available, check out this you tube video instead: https://www.youtube.com/watch?v=UnjwvtFvyeQDescribe the movement of the vinegar eels.Do they have a complete or incomplete digestive system?What structures are found in Acanthocephalans which allows them to perform its endoparasitic life? Explain
- Explain the interaction of cuticle, body-wall muscles, and pseudocoelomic fluid in locomotion of nematodes.Identify and describe the features of Rotifera and Acanthocephala that make them distinct from one another, and how is the ‘relatedness’ of these organisms supported by molecular data? Identify two specific anatomical features of free-living and parasitic flatworms and relate it to their mode of living.Why it is important to distinguish the features of insects and arachnids?Explain?
- All cnidarians have cnidoblasts, but not all cnidoblasts sting. What else could an ejecting thread do to capture a prey organism?For the phylum Gastrotricha please provide: - -- General biology. Approximately how large is the phylum? What do they look like? In what types of environments are they found? What do they eat? Do they have any unique body structures? --Phylum features. Protostome vs deuterostome vs?? Type of digestive system, circulation, respiration, mode of reproduction (note some of these structures may be absent or not known in which case say that don’t just leave them out). --Phylogenetic position. What other phyla are close relatives? What features do they share? Show recently accepted phylogeny.In Hydrozoans such as the Obelia pictured above, what do gastrozooids and gonozooids have in common, and what are their respective functions? They are both medusae; gastrozooids produce polyps via budding, and gonozooids filter particles from the water to feed They are both polyps: gastrozooids filter particles from the water to feed, and gonozooids produce reproductive medusac via budding They are both medusae: gastrozooids filter particles from the water to feed, and gonozooids produce polyps asexually via budding They are both polyps; gastrozooids filter particles from the water to feed, and gonozooids produce additional polyps via asexual budding