Which of the following occur in telophase I of meiosis?
a. nuclear envelope formation
b. pairing of homologues
c. formation of a bipolar spindle
d. crossing over
e. condensation of chromosomes
ANSWER: a
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Clams, oysters, and scallops are called bivalves because they have
a. a pair of eyes. b. bilateral symmetry. c. a double foot region. d. a shell made up of two halves. e. two sexes.
How many amino acids are considered to be
essential because the human body cannot synthesize them? a. 2 b. 5 c. 8 d. 10 e. 12
Four of the five answers listed below are end-products of digestion ready for intestinal absorption. Select the exception
a. monoglyceride b. monosaccharides c. disaccharides d. amino acids e. free fatty acids
When bass were removed from a stream, an algal bloom occurred. This is an example of
A) top-down control. B) bottom-up control. C) the null model. D) apparent competition.