Compare and contrast the gas-exchange mechanismsof hydras, earthworms, insects, aquatic vertebrates, andterrestrial vertebrates.

multiple choice

If the frontal cilia of an ascidian pharynx were immobilized what would be the likely consequence(s) closure of siphons no mucus net spreading cessation of gas exchange cessation of the feeding current

Give answer to all parts    1.) Describe trade-offs faced by endotherms vs ectotherms – focus on benefits and downsides for each.   2.) Discuss environmental pressures faced by organisms in a rocky intertidal zone. What adaptations do you expect to find in invertebrates living there?   3.) Discuss nutrient environments in freshwater habitats, and how they are related to the speed of water flow.

Q1: please select the correct answer choices (there could be more than one answer choice)

Q6: please match all the taxa with the given options on the picture

In insects, as in some other animals we have seen, the hemocoel is primarily responsible for: providing a place for food storage retracting the gubernaculum and the pharynx O coeling the hemo replacing the intestinal system with increased surface area holding and circulating body fluids protecting the anterior ganglia

Which of the following animals uses a tracheal system to breathe? -Insects -Crayfish -Brittle stars -Fleshy-lobe finned fish -None of the above