Which is not needed for facilitated diffusion? 1 ATP
2 protein channels
3 concentration gradient

Identify the terms using the following picture. principle of dominance item 1 can be described as the . item 2 can be described as the . the "p" represents from one parent.

Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation

The fruit of a certain plant is sweet and fleshy. the seeds of this plant have a seed coat that is fairly tough. the seeds germinate better if they are exposed to acid, or scarification. what is the most likely type of dispersal for this seed? water animal wind