In humans, the stem cells from which all blood cells arise are found in the
A. peripheral circulation.
B. lymphatic vessels.
C. lymph nodes.
D. bone marrow.
D
Biology & Microbiology
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If goats are crossed with sheep, embryos will form but cease development and spontaneously abort. This is an example of
A. a prezygotic mechanism. B. hybrid inviability. C. hybrid sterility. D. hybrid breakdown. E. spermatic behavior.
Biology & Microbiology
Atmospheric pressure
What will be an ideal response?
Biology & Microbiology
Nucleic acids, proteins, and complex carbohydrates are all produced by
A) hydrolytic reactions. B) dehydration synthesis. C) exchange reactions. D) hydrogen bonding. E) catabolic reactions.
Biology & Microbiology
The majority of prokaryotes are capable of forming endospores
Indicate whether the statement is true or false
Biology & Microbiology