A grizzly bear has a powerful jaws full of a strong teeth that are used by the Bear to capture and consume its prey. when a bear uses a tools it is an example of which of the following two body systems working together?

Plz plz plz quick! 49 points for whoever which of the following statements about greenhouse effect is true? *life on earth is suffering because of greenhouse effect *the greenhouse effect is caused by human activity *all greenhouse gases are harmful *life on earth would not exist without the greenhouse effect

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.

After fertilization, which type of cellular division is responsible for the growth and development of a complex, multicellular organism?