Which hormone is responsible for the enlargement of the mammary glands during pregnancy?
a. estrogen
b. luteinizing hormone
c. oxytocin
d. progesterone
e. prolactin
ANSWER: e
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A major biological paradox is that genes are generally highly conserved and yet
A. there is very little difference among life forms existing today. B. there is so much diversity among life forms existing today. C. there are a huge number of ancestral genomes no matter how far back we look. D. there are essentially identical development patterns in all species. E. there is very little research into genomic sequences.
Two genes are on the same chromosome, yet crossing over occurs between them every time meiosis occurs. Are these
genes linked or unlinked and why?
What will be an ideal response?What organ aids in the camouflage of a fish by making the ventral surface light?
a. Chromatophores b. Epiphores c. Photophores d. Mesophores
Open (compound)
What will be an ideal response?