The closest living relatives of birds are ____
a. mammals
b. lizards
c. turtles
d. crocodiles
e. amphibians
ANSWER: d
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Which of the following can serve as reservoirs for pathogens?
a. water b. soil c. animals d. humans e. fomites f. food
Liquids must absorb energy
What will be an ideal response?
Why might a racial group have fairly consistent skin colors but inconsistent alleles for the skin colors?
A. Few allele variations between groups are expected if races were genealogical species. B. Analysis of the single gene involved in skin color shows a long separation between groups. C. Skin color is polygenic and the same skin color may be produced by different gene pools. D. No relationship exists between alleles and skin color.
We do not have any fossils of unicellular prokaryotes. The first organisms to appear in the fossil record are unicellular eukaryotes.
Answer the following statement true (T) or false (F)