Which enzymes perform proofreading during DNA replication?
a. DNA ligase
b. DNA polymerase
c. primase
d. telomerase
Ans: b. DNA polymerase
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If the energy of the sun no longer reached Earth, the primary productivity of which of the following ecosystems would be least affected?
A. deep sea hydrothermal vent B. temperate rain forest C. desert D. taiga E. coral reef
__________ are short sections of underground stem
encased by overlapping layers of thickened, modified leaves called scales. a. Stolons b. Rhizomes c. Bulbs d. Corms e. Tubers
Baroreceptors are used for regulation of
a. blood cell production. b. blood pressure. c. coronary artery flow. d. blood flow to the digestive tract. e. blood flow to the kidneys.
Genes for different traits located on the same chromosome in close proximity are called ________ genes
Fill in the blank(s) with correct word