The different blood vessels; First, Arteries that carry the blood from the heart. Then, the Capillaries which allow an exchange of water and chemicals throughout the blood and the tissues. Finally, Veins that carry blood from the capillaries to the heart.
D. Because experimentation includes a control group. also, independent and dependent variables are part of an experiment they arent a type of research
The cuticle and stomata because both parts function to regulate water absorption and release for the plant.
The answer is A) nucleus acid! 2 weeks ago we just experimented it!
I hope it helps
I think the answer is "the older it is"
Reason: I might be wrong but is something (like a shell) gets buried in something (like sand), overtime many things (like dirt, soil, sand, etc.) will be on top of the original. This will make layers. So, the older rock is on the bottom since it has been there for the longest and it gets covered by other stuff (causing the layers).
Hope this helps! :) (If I'm wrong, sorry :( )
