6. Lion
7.raccoon
8.rat
9. A keystone is a organism that helps define the entire ecosystem, and if the species were to disappear from the ecosystem no other species would be able to fill its ecological niche the ecosystem would be forced to radically change allowing new and possibly invasive species to populate the habitat.
Explanation:
Reflexes do slow with age. Physical changes in nerve fibers slow the speed of conduction. And the parts of the brain involved in motor control lose cells over time.
Researchers found that the brain's response time begins to decline at age 24. The descent is a slow, but nonetheless, steady one.
Needs a better description, but i am happy to help you if you need it !
In animals, a cleavage furrow begins to form between the soon-to-be sister cells. The lipid bilayer is pinched until the cells are finally separated. In plants, the cell walls are made up of cellulose, so they won't bend. Instead, a new wall is grown in between the the two new cells.
Hope this helps. :D
I think it’s A could be wrong though
