As early as the ________ month, as the brain and spinal cord grow, the fetus can demonstrate movement and respond to stimuli
A) fourth B) third C) second D) sixth E) fifth
B
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The phospholipids of plasma membranes have
a. a hydrophobic head and a hydrophilic tail. b. a hydrophobic head and a hydrophobic tail. c. a hydrophobic head and two hydrophobic tails. d. a hydrophilic head and two hydrophobic tails. e. a hydrophilic head and two hydrophilic tails.
Paired homologous chromosomes are found at
the spindle equator during a. metaphase I. b. telophase I. c. prophase II. d. metaphase II. e. anaphase II.
Which of the following are found in the nucleus?
a. plastids b. vacuoles c. vesicles d. nucleoli e. microbodies
Which of the following is a behavioral response to environmental variability?
A) migrating to a different location B) acclimation C) endothermy D) "flagging" by trees