Using only the information provided in the paragraph, which of the following is the best initial hypothesis for how D. santomea descended from D. yakuba?
A) allopolyploidy
B) autopolyploidy
C) habitat differentiation
D) sexual selection
C
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All of the following proteins may be found in the extracellular matrix of animal cells EXCEPT _____
A) collagen B) fibronectin C) actin D) All of the listed proteins are found in the extracellular matrix of animal cells.
What part of our skeleton most resembles an exoskeleton?
What will be an ideal response?
Matching. Choose the one most appropriate answer
for each. 1. ___ biological magnification 2. ___ detritus 3. ___ legumes 4. ___ net primary production 5. ___ primary productivity 6. ___ food chain 7. ___ gross primary production A. rate at which energy becomes stored in organic compounds through photosynthesis B. total amount of solar energy stored in organic compounds during photosynthesis C. a straight-line sequence of steps by which chemical bond energy moves to higher trophic levels D. the potential chemical energy remaining (after aerobic respiration by autotrophs) that can be passed on to other trophic levels E. DDT in the environment F. a kind of plant that increases soil nitrogen content G. particles of organic waste products, dead, or partly decomposed tissues
Production of the iron-storing protein ferritin is regulated by aconitase, which binds to a 30-nucleotide sequence at the beginning of the ferritin mRNA and interferes with ribosome binding. Aconitase must be a
A. transcription repressor protein. B. RNA interference protein. C. translation initiation protein. D. translation repressor protein.