One secondary spermatocyte ultimately produces ____ mature sperm
a. one
b. two
c. three
d. four
e. eight
ANSWER: b
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Transposons
A. are informally known as jumping genes. B. may cause insertion mutations. C. may cause knockout mutations. D. were first recognized in plants. E. All of the choices are correct.
Which branch of biology examines the form and variety of organisms in their natural environment?
a. taxonomy b. natural history c. comparative morphology d. biogeography
e. geologyWhich animal is likely to have the circulatory pattern shown in the figure?
A. frog
B. mammal
C. bird
D. fish
E. crocodile
One way to produce a vaccine is to heat a virus or bacteria and then inject the inactive pathogen as a vaccination. How would the heat inactivate a virus?
A. by inhibiting its metabolism B. by destroying the membrane C. by blocking facilitated diffusion D. by denaturing proteins E. All of the answer choices are correct.