Crossing over occurs during
a. anaphase I.
b. metaphase II.
c. prophase I.
d. prophase II.
e. telophase II.
Answer: c
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Which of the following defense mechanisms are found in invertebrates?
a. phagocytes b. lysozyme c. antibodies d. phagocytes and lysozyme e. phagocytes, lysozyme, and antibodies
What are species of Rhizobium and Bradyrhizobium bacteria most directly associated with?
a. nitrification b. ammonification c. nitrogen cycling d. nitrogen fixation
Why have reptiles successfully adapted to land?
A) They have a two-chambered heart to maximize oxygen utilization. B) They lack gills at any point during their development. C) They are endothermic. D) They nurse their young. E) They produce eggs that resist dehydration.
The genus of bacteria that undergoes cell division in random planes, forming grapelike clusters of round bacteria, are the ________.
What will be an ideal response?