(Solved): 1. Which of the following combinations correctly matches a phylum to its description? A) Echinoderm ...

1. Which of the following combinations correctly matches a phylum to its description? A) Echinodermata - bilateral symmetry as a larva, water vascular system B) Nematoda - segmented worms, closed circulatory system C) Cnidaria - flatworms, gastrovascular cavity, acoelomate D) Platyhelminthes - radial symmetry, polyp and medusa body forms 2. Which of the following is a characteristic of all chordates at some point during their life cycle? A) jaws B) post-anal tail C) four-chambered heart D) vertebrae 3. Which of these characteristics added most to vertebrate success in relatively dry environments? A) the shelled, amniotic egg B) the ability to maintain a constant body temperature C) two pairs of appendages D) a four-chambered heart 4. Primate evolution and behavior, such as hunting skills, have been directed in part by the development of depth perception. What anatomical change made depth perception possible? A) a larger brain B) the formation of compound eyes C) movement of the eyes to the front of the head D) diurnal activity 5. Much of the coordination of vertebrate body functions via chemical signals is accomplished by the A) respiratory system B) endocrine system C) integumentary system D) excretory system 6. Once labor begins in childbirth, contractions increase in intensity and frequency, causing more contractions to occur until delivery. The increasing labor contractions of childbirth are an example of which type of regulation? A) positive feedback B) negative feedback C) feedback inhibition D) enzymatic catalysis 7. What is the madreporite and what system does it belong to? Briefly explain its function. ( 3 pts) 8. Annelids and Arthropods both have segmented bodies. Name two dominant differences between the two phyla. ( 4 pts) 9. What are the two main differences between millipedes and centipedes? ( 4 pts) 10. What are regulators and conformers? Please explain. (4 pts)