Which describes an object in projectile motion? Gravity acts to push the object sideways. The object moves in a straight path. The forward velocity of the object is 0 m/s. The object’s inertia carries it forward.

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.

they use sunlight, water, and carbon dioxide to make sugars - c.