What drives the movement of soil water, through a root’s epidermis and cortex, to the vascular cylinder?
a. translocation
b. pressure flow
c. Casparian strip
d. osmosis
e. active transport
ANSWER: d
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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.
What evidence supports the theory of an early "RNA world"?
What will be an ideal response?
The lactose repressor
A. is transcribed with the structural lac genes. B. is inactivated by binding lactose. C. requires lactose for its transcription. D. is activated by binding lactose.
The amplification of recombinant plasmids occurs by:
a. the growth of the plasmid DNA. b. DNA replication of plasmids outside a host cell. c. the process of growth and division of the host cell. d. transformation of bacterial cells. e. the polymerase chain reaction