Answer:
c. A piece of mesh, keeping some things out and letting some things in
Explanation:
The cell membrane of a cell is described as "selectively permeable". Permeable means things can go through it, but the word selectively is the important part. It lets things in, but it also keeps things out. This way it can regulate the different things that go in and out of the cell. It allows certain molecules that provide the cell nourishment and other things that help it function, and at the same time, it allows waste to move out of the cell. Not all needed molecules can go through the "mesh-like" membrane, that why some of them need help.
Often, we can cause the exchange of electrons, which creates charge.
For example, rubbing a rubber comb with a wool cloth will create charge on the comb, and it will attract small bits of paper.
Answer:
DNA and RNA are both molecules that contain genetic information and are made up of nucleotides.
Answer: 1. Fur on mammals. 2. Claws on feline creatures.
Answer:
it causes earthquakes and rifts
Explanation:
when the plate moves they brush past each other causing earthquakes
and when they move away from each other they make rifts and when they collide and make mountains
