The bones in a whale’s flipper are the same as the bones in a dog’s front leg. what does this tell you about these two organisms?

they are of the same species
they have a common ancestor
they are both carnivores
they both evolved the same way

Which statements correspond to cellular respiration? co2 diffuses passively into the cell. co2 diffuses passively out of the cell. co2 must be pumped out of the cell. o2 diffuses passively when produced inside the cell. o2 diffuses passively when converted to co2. o2 is pumped in and forces co2 out.

Which ideas did your answer contain? check all that apply. no food for organisms no oxygen in the atmosphere no trees or flowering plants no products based on trees or plants (building materials, medicines, fuels, fibers) no fossil fuels

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above