Answer:
D. By blocking fish migration.
Explanation:
The pictured waterfalls are artificial.
The construction of the wall to raise water level for the falls to be created cuts the contact between marine organisms.
The fish on the other end of the fall cannot freely migrate to the other side.
This is because the falls are too dangerous for them and can lead to their death.
This means that the pictured method of power generation is not environmental friendly.
Four conditions are needed for natural selection to occur: reproduction, heredity, variation in fitness or organisms, variation in individual characters among members of the population. If they are met, natural selection automatically results.
The answer is no cell wall. plant cells have cell walls and if animal cells had cell walls, we wouldn't be able to move as freely as we do.
If you ate a hamburger, you would probably only get about 1 % of the original energy from the sun.
First of all, we know that we only get 10% of energy during energy Transfer.
Sun - Grass - Cow - Human
100% 10 % 1 %
hope this helps
