All of the bees in an area are eliminated by disease. This could lead to reproductive isolation of which of the following species in the area?
A) black cherry trees
B) red ants
C) white-footed mice
D) ostrich ferns
A
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In many cells, the adhesion to the extracellular matrix through integrins causes the activation of kinases in the cytoplasm. This suggests that:
A. integrins promote the activation of signaltransduction pathways. B. integrins are kinases. C. extracellular matrix proteins are receptors and integrins are ligands.
An oncogene is
a. a normal gene that promotes mitosis. b. a gene that codes for a growth factor that stimulates cell division. c. a gene that codes for tumor suppressing proteins. d. a mutated gene that results in tumors. e. more than one of these
Which of the following is used by all living things as the carrier of genetic information?
A. Cell B. DNA C. Organ D. Molecule E. Population
Which of the following is associated with the lubrication of joints?
A) chondroitin sulfate B) lignins C) hyaluronate D) keratan sulfate E) pectins