DNA themselves discovered DNA
JK
The molecule now known as DNA was first identified in the 1860s by a Swiss chemist called <span>Johann Friedrich Miescher</span>
Food webs normally start at the bottom and work their way up. Like the plants will be at the bottom, and then each level shows the animals getting bigger while losing energy. You continually lose energy as you work your way up an ecosystem, so normally there are only three or four levels. I hope this helps!
The cerebrum of the brain is responsible for maintaining consciousness, mental processing, and normal speech
Passive membrane processes are those that do not require energy and move substances down a concentration gradient; namely, these are diffusion, facilitated diffusion and osmosis.
