They wondered how the insides of the single-celled organisms compared to the insides of animals. This is what they said: Lanny: “I don’t think they have any of the organs animals have.”
Dorothy: “I think they have a few of the organs most animals have.”
Seamus: “I think they have a few of the organs simple animals, like worms, have.”
Nick: “I think the only organs they have that animals also have are the digestive organs.”
Valynda: “I think the only organs they have that animals also have are the organs they use for breathing.”
Brian: “I think they have all of the organs that most animals have, they are just a lot smaller.”
Which person do you agree with the most?

Explain why you agree with that perosn

Examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. polyploidy is creating new species. the two populations are not interbreeding freely. hybrid offspring of the two populations begin to appear. one species will increase into a population size twice as large as the other species.

Once an egg cell is fertilized by sperm, the cell then, as the embryo develops, it receives nourishment and eliminates wastes by transferring substances from its blood to its mother's blood. a. becomes a fetus immediately and exits the womb b. begins to divide and implants itself in the wall of the uterus c. remains in the uterus without dividing for several months d. travels back to the ovaries until the fetus is developed

Choose the best definition of allele. a. one of several possible versions of a gene, which each produce a different phenotype b. an organism that's purebred for a given trait c. the process of fertilizing a plant with pollen from another plant d. a set of genes that are located on the same chromosome and so are tightly linked