Annelids, like the earthworm, and arthropods, like insects or spiders, have three main structures in their nervous systems:
a brain, a dorsal nerve cord, and a ventral nerve cord
a brain, segmented ganglia, and a ventral nerve cord
segmented ganglia, a dorsal nerve cord, and a ventral nerve cord

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?

What is true of all organisms in the kingdoms protista, plantae, fungi, and animalia? a. they are multi-celled. b. they are photosynthetic. c. they have cells that contain membrane-bound organelles. d. they contain cells that lack membrane-bound organelles.

Albinism is an inherited genetic disorder. explain what it is meant by inherited genetic disorder