The first viroid was found in plants and was a
a. circular DNA surrounded by protein.
b. circular RNA surrounded by protein.
c. circular DNA with no protein coat.
d. circular RNA with no protein coat.
e. none of the above.
Answer: d
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A. ascomycetes B. basidiomycetes C. chytrids D. glomeromycetes E. zygomycetes
At high population density, __________ is favored, investing more time and energy in fewer, higher
quality offspring. Fill in the blank(s) with the appropriate word(s).
Which layer lacks blood vessels?
A) hypodermis B) subcutaneous C) epidermis D) dermis
Dehydration is generally a more serious concern in older adults than in younger adults because:
A) older adults lose significantly more water through perspiration. B) total body water constitutes only 45% of body weight in older adults. C) renal function increases significantly in patients over 60 years of age. D) a person's total body water increases by 10% for each 10 years of life.