In meiosis, homologous chromosomes separate during
a)prophase I.
b)prophase II.
c)anaphase I.
d)metaphase I.
e)anaphase II.
c)anaphase I.
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Bone with insufficient or abnormal collagen would __________________ compared with healthy bone
A. fracture more easily B. become demineralized C. contain less hydroxyapaptite D. have less range of motion
The "adaptor" molecule that was hypothesized by Francis Crick to link amino acids to mRNA is actually which type of biomolecule?
A. protein B. DNA C. tRNA D. rRNA
Terrestrial vertebrates and some fish evolved a form of fertilization in which the male gametes are introduced into the female reproductive tract. What is this called?
A. synchronous fertilization B. external fertilization C. internal fertilization D. asexual fertilization
Which of the following is NOT a characteristic
of the arctic tundra? a. a perpetually waterlogged soil b. rapid nutrient recycling c. one of the world's greatest store of carbon d. permafrost e. cool, anaerobic conditions