In 2h2so4, the number of hydrogen atoms is , the number of sulfur atoms is , and the number of oxygen atoms is .

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 of the following situations describes a adaptation for a mole? question 2 options: a mole is blind and cannot see underground. a mole is bright and attracts the attention of predator birds. a mole has a sensitive sense of smell to it find food underground.

Up to what percentage of the world's flora consisted of cycads during the triassic period? 100% 75% 50% 20%