The diagram below illustrates a theory on how giraffes may have developed their long necks. Original, short-necked Keeps stretching neck Continues stretching Long-necked
ancestor
to reach leaves higher until neck becomes descendant after
up on tree
longer
many generations
Which of the following questions, if answered, would help us understand whether the theory illustrated in the diagram is supported by genetics?
O A. Do these giraffes reproduce sexually or asexually?
O B. Can a behavior, such as stretching a body part, be part of the giraffe's DNA?

What causes temperature extremes in the desert

Students in biology are studying the macromolecules of life. they used a calorimeter to determine the calories in various types of food. once the lab was completed, the students ate the left over food samples. monica commented that in just 6 or 7 "chews" of the saltine, it was gone; nothing but a sticky paste in her mouth. elaborate on what happened chemically while chewing the saltine. include the macromolecules present.

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