The main nitrogenous waste of adult amphibians is:
a. ammonia.
b. urea.
c. uric acid.
d. peptides.
e. purines.
B
Biology & Microbiology
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The ____ of the plant refers to the structure and arrangement of its internal parts
a. morphology b. ecology c. anatomy d. distribution e. physiology
Biology & Microbiology
Estimates vary, but reasonable estimations of extinction rates suggest that extinction is occurring at a
rate approximately __________ above the normal background rate. a. 10 b. 100 c. 1000 d. 10,000 e. 1,000,000
Biology & Microbiology
transcription ends when RNA polymerase reaches a
What will be an ideal response?
Biology & Microbiology
The organelle responsible for harvesting light as an energy source for photosynthesis is the ________.
A. centriole B. mitochondrion C. chloroplast D. kinetoplast
Biology & Microbiology