Which enzyme performs the DNA unwinding function during transcription elongation?
a. DNA helicase
b. DNA ligase
c. topoisomerase
d. RNA polymerase
Ans: d. RNA polymerase
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What is the benefit of adhesion of water to sediment? a. It allows for an increase of oxygen in sediments
b. It provides protection from capillary action. c. It allows organisms to build habitats from sticky sediments. d. It allows microscopic organisms to live in the small spaces between sediment particles.
Hair cells are important in the sense of:
a. touch b. hearing c. taste d. sight e. equilibrium
Multiple trait analysis (beak width and beak depth) on the medium ground finch, in response to the drought of 1976-77, has generated the three-dimensional graph, shown in the accompanying figure
If the blue triangles represent fitness levels for the quantified parameters, then the birds showing the greatest fitness should have ________. A) deep, wide beaks B) deep, narrow beaks C) shallow, wide beaks D) shallow, narrow beaks
Most flowering plants grow throughout their lives. This type of growth is known as
A) indeterminate growth. B) secondary growth. C) primary growth. D) exponential growth. E) determinate growth.