Frequently, a group of related species will each have a unique courtship ritual that must be performed correctly for both partners to be willing to mate. Such a ritual constitutes a ________ and ________ reproductive barrier
A) mechanical; postzygotic
B) behavioral; prezygotic
C) temporal; prezygotic
D) gametic; postzygotic
Answer: B
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In summer squash, spherical-shaped fruit has been
shown to be dominant to elongated fruit. On one occasion two different spherical varieties were crossed and produced all disk-shaped fruits. When these hybrid disk-shaped fruits were crossed, they produced 75 disk-shaped fruits, 48 spherical fruits, and 9 elongated fruits. Explain these results. What will be an ideal response?
If you observe a cell that contains organelles, then that cell is most likely a(n) prokaryote
__________________ Indicate whether the statement is true or false.
Who was the Swedish naturalist who established the modern system for classifying organisms?
A) Aristotle B) Linnaeus C) Whittaker D) Woese E) Darwin
What statement below characterizes pigments’ function?
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