Which of the following statements are true of xylem?
A. It contains specialized cells known as tracheids.
B. It is found in the gametophyte generation, but not in the sporophyte.
C. It provides structural support to the plant.
D. It is found in all land plants.
E. It assists in conducting materials, such as water and minerals, throughout the plant.
Answer: E
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Which bacterial genus is LEAST related to the others listed?
A) Actinomyces B) Mycobacterium C) Nocardia D) Streptomyces
Products of carbon reactions The carbon reactions produce ATP and NADPH.
a. true b. false
The response initiated by protein kinase A is terminated by
a. inactivation of the initial receptor. b. inactivation of the stimulatory G protein. c. degradation of cAMP. d. dephosphorylation of phosphoproteins by protein phosphatase 1.
A _________ microscope converts slight differences in light refraction to much larger differences in contrast.
A) phase-contrast B) brightfield C) darkfield D) fluorescent