If a sieve tube in a plant becomes blocked, the plant
will experience difficulty in
a. carrying on transpiration.
b. transporting minerals.
c. translocating food throughout the plant.
d. completing cell division and experiencing
normal growth.
e. healing wounds.
Answer: c
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Stress hormones have been shown to interact with drugs of abuse in that
a. stressors enhance the responses of rodents to psychostimulants like amphetamine. b. humans may relapse to drug use behaviors when under stress. c. they may alter the responsiveness of brain dopamine systems. d. All of the above
Helena’s doctor has advised her to take calcium supplements to help prevent:a
osteitis. b. osteoporosis. c. osteopenia. d. osteoarthritis
e. osteon disease.A "shotgun" approach to antimicrobial therapy involves
A. using a broad-spectrum drug so that the chance of killing the pathogen is greater. B. performing the disk diffusion assay. C. using antiviral and antibiotic drugs in combination. D. giving a narrow-spectrum drug. E. culturing the pathogen and identifying it.
Pathogenic microorganisms and their hosts live in a close association with one another known as:
A. sociality B. commensalism C. biofilms D. parasitism E. mutualism