Look at the sketches. The sketch on the left is of a fish embryo, and the sketch on the right is of a pig embryo.

Which of the following statements is the best explanation for why the embryos look so similar, considering how different an adult fish and pig are?

Fish and pigs both need gills.

Fish and pigs are both mammals.

Fish and pigs share a common ancestor.

Use the drop-down menu to match the following definitions to the corresponding terms. the total variety of organisms that live in the biosphere a group of organisms that breed and produce offspring that can breed all of the biotic and abiotic factors in an area

Can you identify which of the following groups of organisms are, or are not, populations? a. the american bison (bison bison) and grey wolves (canis lupus) currently living in yellowstone national parkb. all of the rainbow trout (oncorhynchus mykiss that) that have ever lived in lake eriec. the group of american bison (bison bison) currently living in yellowstone national parkd. a group of calliope hummingbirds (selasphorus calliope) and a group of rufous hummingbirds (selasphorus rufus) living in the same new hampshire woodse. the northern cardinals (cardinalis cardinalis) living on opposite shores of lake champlain f. all of the whales currently living in the atlantic ocean off cape cod, massachusetts

Is dna the same in every cell in the human body explain your answer