Meiotic cell division replicates a cell's DNA ____________ and then divides ______________.
A. twice once
B. once, twice
C. twice, twice
D. once, once
E. None of the answers are correct
B. once, twice
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Which of the three modes of selection would be most likely to result in speciation? Why?
What will be an ideal response?
Which offspring in the illustration above are homozygous recessive for both traits?
a. PPTT b. ppTT c. PpTt d. pptt e. PPtt
A hormone that prevents release of a different hormone by its target endocrine cells is called a(n) _____ hormone
a. releasing b. inhibiting c. amino acid-derived d. steroid e. peptide
The ecological footprint of cities can be reduced by _____________.
A. using more fertilizers on lawns and public parks B. planting rooftop gardens C. tax incentives to encourage investment in renewable energies D. composting food waste and growing food in community gardens E. B, C, and D are all correct.