Animals that see only black and white have predominantly what type of photoreceptors?
a. rod cells
b. cone cells
c. dendrites
d. photo discs
A
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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
Four of the five answers listed below are protistan structures. Select the exception
a. cell membrane b. pili c. mitochondrion d. eyespot e. pellicle
When cancer cells infiltrate muscle cells under the
breast, the only treatment option is a. radiation therapy. b. chemotherapy. c. a radical mastectomy. d. gene therapy. e. diet modification with massive vitamin intake.
Four of the five compounds listed below are
hormones associated with digestion. Select the exception. a. bile b. gastrin c. secretin d. cholecystokinin e. gastric inhibitory peptide