Chronic exposure to cortisol induces physiological changes including __________________.
a. Activation of immune system
b. Elevation of glucose level in blood
c. Reduction of blood pressure
d. Suppression of bone formation
e. b and d
Answer: e. b and d
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What growth conditions would you use to enrich for ammonia-oxidizing bacteria?
A) aerobic mineral media with ammonia and bicarbonate incubated in the dark B) anaerobic mineral media with acetate and ammonia incubated in the dark C) aerobic mineral media with acetate and ammonia, incubated in the dark D) anaerobic mineral media with ammonia and nitrate incubated in the dark
Which of the following techniques involves altering an organism’s DNA by inserting a gene
from a different organism?
a. DNA profiling b. genetic engineering c. therapeutic cloning d. DNA fingerprinting
With sexual reproduction, two genes for the same
trait that are slightly different are called __________. Fill in the blank(s) with the appropriate word(s).
A main function of a plant's root system is to:
a. photosynthesize. b. absorb dissolved nutrients and water. c. absorb atmospheric carbon dioxide. d. capture sunlight. e. bear seed-containing fruits.