EXPLAIN Complete the statement by coloring, bolding, or highlighting the correct terms. Before the reaction, there are two | four | eight | oxygen atoms, and after the reaction, there are (two | four | eight |) oxygen atoms. The same is true for hydrogen atoms. So, atoms are | are not created or destroyed. This supports | refutes the claim that matter is conserved during a chemical reaction.

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.

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.

Hedgerows have created a new ecosystem within britain’s a. farms b. cities c. forests d. industrial areas