Answer:
Gaseous exchange
Explanation:
In terrestrial plants, gaseous exchange occurs mainly in leaves and to a lesser extent in the roots and stems. In leaves, the structures involved in gaseous exchange are stomata and spongy mesophyll tissues.
The stoma comprises of a stomatal pore and two specialized guard cells. The guard cells are structurally adapted by having chloroplasts, thicker, inelastic inner walls and thinner and elastic outer walls.
The stomata mostly opens during the day. They open when the guard cells are turgid.When the guard cells are flaccid, the thinner outer wall shrinks. The inner thicker walls curvature reduces causing the stomata to close.
Answer:
1. new evidence is constantly being dug up which makes it difficult to confirm
Explanation:
2. some people believe in creation, meaning someone/something made us how we are and have always been
I have answered the ones I can, I honestly don't know what to tell you for 3 but I hope this helps!
Cell Membrane is a thin external covering.
Cytoplasm is a jello-like substance holding cell parts in place. Ribosomes are tiny circle attached to rough ER or separate in the cytoplasm.
