Which statements describe functions of antibodies? Check all that apply.

They maintain the cell’s shape.
They regulate cell processes.
They protect the body from infectious agents.
They signal the immune system to destroy pathogens.
They speed up biochemical reactions.
They send electrical signals.

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.

Whay is the following best defines climate

Natural selection changes allele frequencies because some survive and reproduce more successfully than others.