A main function of most types of epithelial tissue is ________
A) sensation
B) support
C) covering surfaces
D) absorption
C
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Molecules are made up of ______.
A. atoms B. cells C. organs D. organisms E. populations
Suppose that pigmentation of a Labrador retriever's fur is subject to epistasis of the B alleles by the e alleles. B (black) is dominant over b (chocolate brown). E is dominant over e. Homozygous e is epistatic to the black and chocolate-brown genes. Given this information, what will result from a F1 dihybrid cross between two dogs?
a. 9/16 black, 6/16 brown, 1/16 yellow b. 9/16 yellow, 3/16 brown, 4/16 black c. 9/16 yellow, 6/16 brown, 1/16 black d. 9/16 black, 3/16 brown, 4/16 yellow
When cells differentiate, they ____
a. lose DNA b. remain totipotent c. express a specific subset of genes d. stop growing e. gain DNA
Oceanic ridges form
a. along oceanic trenches. b. where shallow seas dry up. c. in zones of rising magma. d. where old oceanic crust sinks below continental crust. e. where two continents collide.