Answer:
C
Explanation:
It’s always the right answer
Answer:
The lowest level, which is usually the producers.
Explanation:
This is because on every level of the trophic system, some energy is lost before the next level. So the level with the least lost energy is the lowest
Biological soil crusts<span> are communities of living organisms on the </span>soil<span> surface in arid and semi-arid ecosystems. They are found throughout the world with varying species composition and cover depending on topography, </span>soil<span> characteristics, climate, plant community, microhabitats, and disturbance regimes.</span>
I think that p<span>igments </span>absorb light<span> used in </span>photosynthesis. In photosynthesis<span>, the sun's </span>energy<span> is converted to chemical </span>energy<span> by photosynthetic organisms. ... For instance, </span>plants <span>appear green to us because they contain many chlorophyll a and b molecules, which reflect green </span>light<span>.
I think this is the answer. </span>
Explanation:
1. cell membranes are partialy permeable, only allowing passage to some certain molecules.
2. diffusion is the movement of molecules across partially permeable membrane down concentration gradient.
3. the molecules are too big to pass through partially permeable membrane. the concentration of the molecule might be higher in the cell than in the solution/surroundings.
