What is the name of the chitin-reinforced bristles that protrude outward from the body wall and are used by most segmented worms to anchor themselves against a substrate?
a. clitella
b. septa
c. parapodia
d. setae
Ans: d. setae
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Birds, snakes, lizards, turtles, and crocodiles are all thought to share a common ancestor and several homologous traits. Assuming that this is true, these groups of animals and their common ancestor would represent
A. a polyphyletic group. B. a monophyletic group. C. homoplastic convergence. D. an outgroup. E. a species cluster. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about monophyly? Consider Possibilities · Consider the different answer options. Which can you rule out? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
A genetic code word is called a(n)
A) proton. B) codon. C) nodoc. D) amino acid.
What gland secretes growth hormone?
A) posterior pituitary B) anterior pituitary C) adrenal cortex D) thyroid gland
Which of the following regions has the greatest distribution of HIV infection and AIDS in the world?
A) North America B) Eastern Europe and Central Asia C) South and Southeast Asia D) sub-Saharan Africa E) Latin America