Archaea which live in environments with very high salt concentrations are known as:
a. Methanogens
b. Halogens
c. Halophiles
d. Hermaphrodites
Ans: c. Halophiles
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You notice that your houseplants are all growing toward the light from your window. This indicates that their stems display:
A. positive gravitropism. B. positive thermotropism. C. positive phototropism. D. negative phototropism. E. negative gravitropism.
____ is produced by the ____, which influences biological rhythms and the onset of sleep
a. Cortisol; pineal gland b. Melatonin; pituitary gland c. Parathyroid hormone; parathyroid gland d. Melatonin; pineal gland e. Aldosterone; adrenal gland
Which of the following are water-conducting cells that are dead at functional maturity?
A) parenchyma cells B) collenchyma cells C) tracheids and vessel elements D) sieve-tube elements
Which hypothesis is most likely to be productive for their initial investigation?
A) The nucleotide chain of the enzymes may be incorrectly formed. B) The dye in the fabric may have hydrolyzed the fatty acids in the enzymes. C) The three-dimensional structure of the proteins may have been altered. D) There may not have been enough phospholipids for the volume of fabric.