Living organisms obtain many of their requirements by diffusion. They also get rid of many of waste materials in this way. For example, Plants need carbon dioxide for photosynthesis. This diffuses from the air into the leaves through the stomata. It does this because there is a lower concentration of carbon dioxide inside the leaf as the cells are using it up. Outside the leaf in the air, there is a higher concentration. Carbon dioxide molecules therefore diffuse into the leaf down this concentration gradient :)
I hope u understood!
Haploid gametes egg/ sperm body cells
Answer:
B
Explanation:
T tubules do not generate ATPs. This is done by mitochondria. T tubules are the invagination of cell membranes into the muscle cells. They allow for rapid actuation of the action potential by the muscle cells. They do this by synchronizing the release of calcium ions that are important in muscle contraction.
Hi there!
The stage after Protostar would be - Sequence Star.
Hope this helps you!
~DL
