Active transport.
Passive transport, being its opposite, requires no energy at all. Therefore, active transport would require energy or ATP in order to move across.
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Answer:
The cyclins activate the CDKs, which affect the cell cycle at three important checkpoints: Late in the G1 stage of the cell cycle, triggering the cell to move into the S phase.
Explanation:
Fire naturally occurs in a grassland ecosystem and it helps the environment stay healthy and strong. I promotes richer soil as well as gets rid of excess leaves scattered around. After a fire, grassland ecosystems can grow again and be better than they were before.
The correct answer is letter B. the closer the star, the larger the Parallax angle. This is an illusion that is made through visual perspectives of observers of stars. A parallax can also be used to find the distance to the stars that are relatively close.
<span>Humans have pores in their skin to sweat and cool off the body. Plants have similar structures called stomata. Through these structures, plants can do the same things humans can through their pores, such as release the heat from them, as well as unnecessary chemicals through "sweating." Tendrils are stems, pores are called stomata, and not pores when it comes to plants, and receptacles are parts of the stem where flower organs grow.</span>
