Which of the following is NOT accurate regarding the Bicoid protein?
A. It affects the posterior part of the Drosophila embryo.
B. It activates gap genes.
C. It is a transcription factor.
D. It is a morphogen.
E. It activates genes when it reaches a concentration threshold.
Answer: A
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Populations in which individuals repel each other because resources are in short supply tend to have
____ distributions.
a. random b. clumped c. uniform d. dynamic e. unpredictable
Referring to the above diagram of the brain, D identifies which region?
a. hypothalamus b. pons c. cerebrum d. cerebellum e. thalamus
Dehydration is generally a more serious concern in older adults than in younger adults because:
A) older adults lose significantly more water through perspiration. B) total body water constitutes only 45% of body weight in older adults. C) renal function increases significantly in patients over 60 years of age. D) a person's total body water increases by 10% for each 10 years of life.
Numerous cases of microcephaly have been observed in the newborn babies of women who were infected with Zika virus during pregnancy. This led to the proposed hypothesis that Zika virus was causing the birth defects. This is an example of
A. deductive reasoning. B. theory development. C. inductive reasoning. D. hypothesis testing.