All of the following are characteristic of life in a marine environment except?
a. Many nutrients and gases are dissolved in the water and are readily available.
b. Buoyancy helps to support the organisms.
c. Currents may wash organisms away from suitable habitats.
d. Osmotic balance is very difficult for invertebrates to maintain.
e. Temperatures are relatively stable.
D
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Ribozymes are ____
a. RNA catalysts b. proteins that catalyze RNA synthesis c. RNA molecules that slow the rate of protein synthesis
d. the products of RNA degradation e. amino acids that catalyze RNA synthesis
The only endocrine gland whose secretory function
is under direct control by sympathetic neurons is the a. pancreas. b. thyroid. c. adrenal medulla. d. thymus. e. testis.
Which organisms are classified as archaeplastids? Describe their mode of nutrition.
What will be an ideal response?
A spectrophotometer can be used to measure
A. metabolic activity. B. turbidity. C. dry weight. D. pathogenicity.