Under favorable conditions, during which phase of meiosis will the chromosomes appear as packets of four chromatids?
A) Anaphase II B) Anaphase I C) Metaphase II D) Prophase I E) Telophase II
D
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Birds use specific songs, coloring, and mating dances to attract mates of their species (sexual selection). This is an example of reproductive isolation.
A. postzygotic B. parapatric C. sympatric D. prezygotic E. allopatric
The function of bile is to
A. digest proteins. B. digest carbohydrates. C. emulsify fats. D. digest nucleotides. E. emulsify proteins.
Which of the following statements about gas exchange in animals with interacting circulatory and respiratory systems is FALSE?
A) Carbon dioxide moves from the tissues into the blood by diffusion. B) Gases are transported in the circulatory system by the bulk flow of blood. C) Oxygen is actively transported into the circulatory system. D) Air or water moves across the respiratory surface by bulk flow. E) Oxygen and carbon dioxide pass through respiratory membranes by diffusion.
List other biological examples in which specific protein interactions are involved.