Which of the following is NOT a typical characteristic of cancer cells?
a. Loss of cellular self-destruct mechanisms
b. Unlimited replication
c. Autocrine stimulation
d. Decreased responsiveness to growth signals
Answer: d. Decreased responsiveness to growth signals
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Individual water molecules are held to one another by relatively weak ________ bonds.
A. nonpolar B. hydrogen C. ionic D. covalent
Which of the following are most likely to have teeth adapted for grinding and/or tearing?
A) suspension feeders B) mass feeders C) deposit feeders D) fluid feeders
The process by which cell lineages become specialized in composition, structure, and function is referred to as
a. apoptosis. b. cytoplasmic localization. c. differentiation. d. embryonic induction.
An organ that is hygroscopic
a. is sensitive to changes in moisture. b. is exemplified by the peristomal teeth in the sporophyte of mosses. c. may aid in spore dispersal in mosses. d. is all of the above.