An aggregate of cells in an organism that have similar structure and function.
Answer:
D (proteins moving ions from low to high concentration across a cell membrane)
Explanation:
Active transport, by definition, is a type of substance transport that requires energy (typically in the form of ATP). Having said that, we can immediately eliminate B (aka water diffusion throughout the cytoplasm of a cell), as diffusion (osmosis in this case) does not require any expenditure/spending of energy. Next, we can cancel A and C because although they do require energy, there is no transport involved. Thus that leaves us with D. D is not only the answer because of the process of elimination but also b/c the ans. choice says that ions are being moved from low to high concentration, which is against the concentration gradient and thus requires energy. Hope you found this helpful! :)
The water would freeze across the surface of the lake, blocking the dissolving of oxygen and nutrients. <span>Water is actually less dense when frozen, which is why ice cubes and ice bergs all float. This is also why you can ice skate on a lake if the ice gets thick enough on the surface. Many organisms that live in freezing lakes have special adaptations which help them survive.</span>
Sulfur and phosphorus compounds enter bodies of water, such as ponds, lakes, and rivers <span>as run-off containing fertilizers and detergents. And based by this, this would then be runned by sedimentation as the deposition of how the water would work and how it would enter the bodies such as the ponds and lakes and other forms of water areas.</span>
<span>Standard reduction potential is the likelihood that a species will be reduced. It is written in the form of a reduction half reaction.
</span>Lithium <span> has the lowest standard reduction potential.</span>
