They also need energy to move and to stay alive
embryonic stem cells could serve as a model to evaluate the physiological effects of environmental pollutants efficiently and cost-effectively.
B.
Passive transport doesn't requireenergy (ATP), active transport doesrequire energy. Passive transport moves molecules WITH the concentration gradient (high to low), while active transport moves molecules AGAINST the concentration gradient (Low to High).
If u mean what it was originally called for then
Answer:
it was originally and officially called for to revise the articles of confederation, and unofficially called for to decide how America should be governed.
The amount of energy<span> at each </span>trophic level<span> decreases as it moves through an ecosystem. As little as 10 percent of the </span>energy<span> at any </span>trophic level<span> is transferred to the </span>next level<span>; the rest is lost largely through metabolic processes as heat.
Hope this helps. </span><span />
