Which of the stages or structures in Figure 51-1 was formed by the process of gastrulation?

a. 1
b. f
c. g
d. 3
e. 5


E

Biology & Microbiology

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If two species of lizards do not mate because their mating rituals differ greatly, they are exhibiting ____ reproductive

isolation.

a. behavioral b. ecological c. gametic d. mechanical e. temporal

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Why are flowering plants considered by many botanists to be the most successful land plants?

What will be an ideal response?

Biology & Microbiology

Which of the following explains the movement of nutrients into a plant's roots at the end of the growing season?

A. active transport B. pressure-flow system C. transpiration D. osmosis

Biology & Microbiology

Because the (ductus/urethra/ureter) is shorter in females than in males, it can be a portal of entry for pathogens

What will be an ideal response?

Biology & Microbiology