Human populations living in temperate, northern climates generally have light skin color because it
A. helps to prevent rickets.
B. exists in a balanced polymorphism.
C. helps to prevent sickle-cell anemia.
D. helps to protect against skin cancer.
E. protects against hypervitaminosis.
A
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The supply function for a pack of four Never Die Batteries is QS = (0) + (6 million × P). If the price of a package of four Never Die Batteries increases by $1, how will this change the quantity supplied?
A) increase by 1 million B) increase by 6 million C) decrease by 6 million D) decrease by 1 million
Name two major changes that have occurred to the Inuit people's subsistence strategy during the past few decades
What will be an ideal response?
Researchers agree that the earliest farming cultures in Europe likely resulted from
a. the independent development of domestication b. the migration of farmers from the Americas c. the diffusion of crops and the idea of agriculture d. millet cultivation in northern China e. overexploitation of animals by hunters
When Mendel crossed a true-breeding tall plant with a true-breeding dwarf plant, all of the F1 generation was tall. Therefore, we may conclude that the allele for dwarfism in the plant is:
A. recessive B. codominant C. dominant D. intermediate in expression