An amphibian heart is shown in the diagram which statement best describes the three chambers of the heart? a) Y receives oxygen-rich blood, X receives carbon dioxide-rich blood, and Z pumps blood

b) Z receives oxygen-rich blood, X receives carbon dioxide-rich blood and Y pumps blood

c) X receives oxygen-rich blood, Y receives carbon
dioxide-rich blood, and Z pumps blood

d) Y receives oxygen-rich blood, Z receives carbon dioxide-rich blood, and X pumps blood

PLEASE HELP ASAP

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?

Could someone me with number one you

In natural selection, what is actually “selected? ” a) alleles are directly selected b) genotypes are directly selected c) phenotypes are directly selected d) entire populations are directly selected