A needle can be made to "float" on the surface tension of water. What causes this surface tension to form?
A. The adhesion of water molecules to the needle
B. The heat capacity of water
C. The solubility of water
D. The cohesion of water molecules to each other
Answer: D
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Unique features of the planctomycetes include ________.
A. a membrane-bound nuclear region B. resistance to ionizing radiation C. their size: some are as large as protozoa D. twitching fimbriae that are required for motility
What is one advantage of using transgenic plant cells to produce human proteins for hormone replacement therapy?
a. Transgenic plants produce lower protein yields than transgenic animals. b. Transgenic plants produce higher protein yields than transgenic animals. c. Plant cells are less expensive to grow than other cell types d. Transgenic animals cannot produce human proteins. e. HIV is spread through proteins harvested from transgenic animals.
The group Amoebozoa
a. is monophyletic. b. includes the amoebas. c. includes the slime molds. d. includes species most of which are able to form pseudopods. e. includes all of these.
Grinding of food is a function of the
a. incisors. b. canines. c. premolars. d. molars. e. molars and premolars