What is the portion of the cell cycle during which the chromosomes are invisible under the light microscope because they are not yet condensed?
A. Metaphase
B. Anaphase
C. Prophase
D. Telophase
E. Interphase
Answer: E
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The introduction of a small population onto an island that results in a limited gene pool for a population best describes
a. the Hardy-Weinberg law. b. genetic drift. c. the bottleneck effect. d. the founder effect. e. the effect of genetic isolation.
When the guard cells of a leaf shrink, how do the stomata change?
A) They open. B) They close. C) They perform photosynthesis. D) They die.
________ are heritable units of information encoded by the DNA molecule that determine the traits of an organism.
a) Phenotypes b) Enzymes c) Genes d) Centromeres
Kinesin is a motor molecule that is characterized by
A) activation of sliding in flagellar microtubules. B) sliding along actin in sarcomere. C) motion toward the "plus" end of the microtubule. D) motion along actin filaments. E) motion toward the "minus" end of the microtubule.