In meiosis, paired homologous chromosomes align down the center of the cell during
A. metaphase I.
B. metaphase II.
C. prophase I.
D. anaphase II.
E. prophase II.
A. metaphase I.
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Foul-smelling flowers may be pollinated by:
a. birds b. beetles and flies c. bees and bumblebees d. wasps e. bugs and butterflies
Lichens are
a. parasitic interactions between a fungus and an alga. b. only found growing on living matter. c. symbiotic associations between a fungus and an alga. d. capable of causing some obscure diseases. e. insensitive to changes in the environment.
Which of the following is NOT a requirement of natural selection?
A) differential reproductive success B) overproduction of offspring C) genetic variation D) gene flow
Which of the following colors contributes the least energy to photosynthesis?
A) blue B) red C) orange D) green