6. Examine the specimen in the photograph below. a. Explain the origin of the two circular openings on this specimen. b. Tell what sort of organism most likely made these circular openings, and why they are located in this particular place on the specimen. c. What might have caused the light-colored circular patches near the top edge and on the left side of this specimen

Most scientific questions are based on opinions. hypotheses. observations. experimental data.

Joe is breeding cockroaches in his dorm room. he finds that the average wing length in his population of cockroaches is 4 cm. he chooses the six cockroaches that have the largest wings; the average wing length among these selected cockroaches is 10 cm. joe interbreeds these selected cockroaches. from earlier studies, he knows that the narrow-sense heritability for wing length in his population of cockroaches is 0.6. a. calculate the selection differential and expected response to selection for wing length in these cockroaches. b. what should be the average wing length of the progeny of the selected cockroaches?

Indicate the coat color and the proportion of offspring with that color for each of the following crosses of rabbits. assume all are homozygous. agouti x albino a) 1/2 albino, 1/2 agouti b) all agouti c) 3/4 agouti, 1/4 albino