Northern Hemisphere winters are colder than
Northern Hemisphere summers because
A) Earth is closer to the sun during the sum-
mer.
B) the snow that falls in the northern lati-
tudes cools Earth during the winter.
C) the light from the sun shines more directly
on the Northern Hemisphere during the
summer.
D) the period of sunlight is longer during the
summer than the during the winter.
1. D only
2. C only
3. A only
4. C and D only
5. B only

How is the male reproductive system different from other body systems? it isn’t necessary to vital signs. it monitors other body systems, and adjusts if necessary. it transports items from one system to another. it is the only system that produces hormones in the male.

Chloroplasts and bacteria are in size. a. similar b. at different ends of the size range c. exactly the same d. none of these

Suppose that on a small island off the coast of scotland, 32 percent of the population has blue eyes, which means that these individuals must be homozygous for the blue eye color gene (bb). the only other eye color found on the island is brown, and individuals that are homozygous for the brown eye color gene (bb) or heterozygous (bb) will have brown eyes because brown is the dominant gene. assume this population is in hardy-weinberg equilibrium. if 100 babies are born next year, how many of these would you expect to have brown eyes and be heterozygous? a. 58 b. 49 c. 29 d. 43