The simplest nervous system found in nature is the nerve net. An example of an organism that senses and responds to its environment with this ancient system would be
A. a jellyfish.
B. a cockroach.
C. an earthworm.
D. a frog.
E. a fiddler crab.
A. a jellyfish.
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A phospholipid has ______ fatty acids attached to glycerol, whereas a fat has _______.
A. 3; 4 B. 3; 2 C. 2; 3 D. 2; 4 E. 4; 2
Which of the following lists the organization of a mammalian body from least to most complex?
A. Tissue—cell—organ system—organ B. Organ system—organ—tissue—cell C. Cell—tissue—organ—organ system D. Tissue—organ—cell—organ system E. Organ—organ system—tissue—cell
Which drug is used to stimulate FSH release?
a. hMG b. hCG c. progesterone d. estrogen e. clomiphene
A mutation of a segmentation gene can result in all of the following EXCEPT
A. missing body regions. B. incorrect establishment of body axes. C. altered expression of homeotic genes. D. replacement of one body part with another. E. duplication of body parts.