Which of the following is a type of epithelial
tissue that is several layers thick?
a. stratified
b. loose connective
c. dense connective
d. simple
e. more than one of these
A
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True-breeding, purple-flowered pea plants were crossed with true-breeding, white-flowered pea plants. The F1 progeny all had purple flowers. If the F1 offspring are self-fertilized, what progeny phenotypes would be expected?
A. 1 purple : 2 pink : 1 white B. 3 white : 1 purple C. 3 purple : 1 white D. all purple E. all white
Which of the following base pairs would be targeted and repaired by a mismatch repair system?
A. A -T B. C-G C. A-G D. A-G and C-G E. A-T and C-G
The toxins of stingrays are destroyed with hot water, therefore they are a type of:
a. protein. b. carbohydrate. c. fat. d. lipid. e. DNA.
The fossil record is often incomplete, simply because scientists will never be able to discover some of the fossils that are buried deep in the Earth.
a. true b. false