The fluid-mosaic model considers the cellular membranes to consist of ________ layer(s) of phospholipid molecules and that the individual phospholipids are able to move about within the structure of the membrane.
A. 1
B. 2
C. 3
D. 4
B. 2
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Which component of the blood is most important for clotting?
A. plasma B. leukocytes C. erythrocytes D. platelets E. All of the choices listed for this question are important for clotting.
Four features help define the __________: a notochord, a dorsal hollow nerve cord, a pharynx with gill slits, and a tail
extending past the anus. Fill in the blank(s) with the appropriate word(s).
The meninges are composed of:
a. bone and dura mater only. b. dura mater and arachnoid only. c. arachnoid and pia mater only. d. dura mater, pia mater, and archnoid only. e. bone, dura mater, pia mater, and archnoid only.
All of the following animals are likely to undergo parthenogenesis EXCEPT
A. lizards. B. insects. C. humans. D. flatworms. E. fish.