In humans, the blastocyst develops about ___
days after fertilization.
a. 1
b. 3
c. 5
d. 7
e. 9
C
Biology & Microbiology
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Gymnosperms lack which structure found in angiosperms?
a. independent gametophytes b. pollen grains c. fruits d. roots e. leaves
Biology & Microbiology
Conversion of ammonia to ____ takes a lot of energy but conserves water
a. urine b. urea c. uric acid d. carbon dioxide e. hemolymph
Biology & Microbiology
Soil formation is due to
A. decomposition of organic matter. B. chemical weathering of rock. C. mechanical weathering of bedrock. D. All of the choices are correct.
Biology & Microbiology
There are several properties that are characteristic of a soil in which typical plants would grow well. Of the following, which would be the least conducive to plant growth?
A) abundant humus B) numerous soil organisms C) compacted soil D) high cation exchange capacity
Biology & Microbiology