Frogs have lungs for breathing, but they also absorb dissolved oxygen directly through their skin. this allows respiration to occur when they are underwater. when they are on land, mucus keeps their skin moist to continue to absorb dissolved oxygen from the air. which statement about water is best illustrated by this example? liquid water can transport nutrients. water breaks down into oxygen molecules for respiration. water is found in every cell of an animal’s body. liquid water is necessary for plants and animals.

Previous pagenext pagepage 3 of 10question 3 (1 point)which of the following consist of cells that do not have a nucleus? of the above

Humans are believed to have evolved in coastal regions in east africa. the region had an abundant supply of fish for early humanoids to eat. when scientists analyze the fads gene they see an interesting pattern. people whose families have lived in this area of east africa for generation show a high level of diversity in alleles for the fads gene. conversely, people whose families had migrated inland a moderate distance from sources of fish showed a much lower diversity for fads gene alleles. additionally, the fads alleles found in people whose family has lived inland for generation are almost all gene alleles which produce fads proteins with a high level of function and activity. how do anthropologists explain this?

Amoeba sisters video recap pedigrees