Name two mammalian traits with relatively high heritability (h2 ) values and two with relatively low h2 values
What will be an ideal response?
high h2: tail length in mice, birth weight in cattle; low h2: litter size in mice and conception rate in cattle
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There are no known human diseases that have been linked to prions.
Answer the following statement true (T) or false (F)
The most ancient type of organisms on Earth originated:
A. 4,004 years ago B. 7,200 years ago C. 2 million years ago D. 3.5 billion years ago E. 13 billion years ago
Why doesn't a tapeworm have a mouth on its scolex?
A. The mouth is on the proglottids B. Endoparasites don't need a mouth C. The mouth is located at the end of the pharynx D. Tapeworms use a radula instead of a mouth to feed
The placenta forms from embryonic tissue and
A) bone marrow. B) amniotic fluid. C) the embryonic disk. D) endometrium. E) the yolk sac.