A cell wall is a structural layer that surrounds some types of cells, situated outside the cell membrane. It can be tough, flexible, and sometimes rigid. It provides cells with both structural support and protection, and also acts as a filtering mechanism. Cell walls are present in plants, fungi and prokaryotic cells, where a major function is to act as pressure vessels, preventing over-expansion when water enters the cells. Cell walls are absent from mycoplasmas.
<u><em>NAD+ and H+ are not the same. </em></u>
NAD+ is an electron carrier. Reactions in metabolism oxidize food molecules and transfer those electrons (along with H+) to > NAD+ which is what forms NADH. Now, NADH is the reduced form of NAD+ and NAD+ is the oxidized form of NADH.
H+ on the other hand, is a proton. It is a hydrogen atom that lost it's electrons. So when you see NADH + H+, that means that the reaction removed 2 electrons and 2 H+ from the compound.
An organism produced by asexual reproduction would more closely resemble its parent because an organism produced through asexual reproduction is created by the parent duplicating its genetic code and separating into two. Essentially the child is a duplicate.
Hey! they are usually single celled!
hope this helped xoxo
From first to last,
1) Pioneer species like grasses and flowers grow
2) Bushes begin to dominate
3) Trees become common and outcompete other plants for sunlight
4) an intact ecosystem is disrupted by a natural disaster
5) The climax community for the area is established once again
