What effect does increasing gene flow between two populations have on their genetic makeup?
What will be an ideal response?
It would make them genetically more and more alike.
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The division of a bacterial cell occurs as the:
A. cell wall develops cracks around the equator of the cell. B. chromosomes are pulled toward the ends of the cell. C. actin and microtubules constrict the cytoplasm. D. new membrane and cell wall materials begin to grow and form a septum.
The mature ovum is produced by completion of meiosis II in the ____
a. oogonia b. primary oocyte c. primary polar body d. secondary oocyte e. secondary polar body
You're studying two species of frog. How would you know if gradualism or punctuated equilibrium played a role in the formation of the two species from their common ancestor?
A) The species would have more differences if speciation occurred gradually. B) The species would have more differences if speciation occurred suddenly. C) The species would be the same regardless of how the speciation occurred. D) The degree of difference depends less on the mechanism of speciation than on the time that's passed since speciation occurred.
All of the following adaptations prevent dehydration in land plants EXCEPT
(A) many guard cells in the flaccid condition (B) many stomates on the top leaf surface (C) water-resistant cuticle (D) the presence of many epidermal hairs (E) recessed stomates