The stage of mitosis characterized by the physical separation of sister chromatids is called

A. telophase.
B. anaphase.
C. prometaphase.
D. metaphase.


Answer: B

Biology & Microbiology

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What is the correct order of the components of a negative feedback loop?

a. stimulus ? integrator ? sensor ? effector(s) ? compensatory response b. stimulus ? sensor ? integrator ? effector(s) ? compensatory response c. stimulus ? effector(s) ? integrator ? sensor ? compensatory response d. sensor ? integrator ? stimulus ? effector(s) ? compensatory response e. sensor ? stimulus ? integrator ? effector(s) ? compensatory response

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The histocompatibility complex proteins function in

A. antibody proliferation. B. B cell maturation. C. recognition of self. D. T cell maturation.

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Epiphyses

What will be an ideal response?

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Mitochondria differ from chloroplasts in that mitochondria

A) convert light energy from the sun to chemical energy, whereas chloroplasts convert one form of chemical energy to another.
B) contain three different membrane-bound compartments, whereas chloroplasts contain two.
C) contain membrane folds called cristae, whereas chloroplasts contain disklike vesicles in stacks called grana.
D) are not found in plants, whereas chloroplasts are not found in animals.

Biology & Microbiology