The CRISPR system
A) facilitates homologous recombination through a complex system of proteins and clustered repeats.
B) recognizes foreign DNA sequences that have previously entered the cell and directs the Cas proteins to destroy them.
C) repairs DNA and increases DNA damage tolerance during times of stress.
D) synthesizes gene transfer agents during stationary phase.
Answer: B
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Wastes and excess ions are moved from the blood into the filtrate in the process of ____________________. Fill in the blank(s) with the appropriate word(s)
The E horizon of soils is characterized by the maximum amount of
A) biological activity. B) decomposition. C) leaching of mineral particles. D) accumulation of leached mineral particles.
The innermost layer of the cortex of a plant root is the
A. epidermis. B. stoma. C. guard cell. D. endodermis. E. petiole.
Figure 32.7
The transporter indicated by the letter "A" in the above figure represents a(n) ____.
A. active Br transporter B. sodium-potassium cotransporter C. passive potassium transporter D. calcium-phosphorus transporter E. sodium-calcium transporter