17=3
18=4
I'm not that sure about 17, but I think it's right
Answer:
Development is largely under the control of genes. Mature cell types of the body, like neurons and liver cells, express different sets of genes, which give them their unique properties and functions.
Explanation:
Hope it helps!
If not, I'm sorry I couldn't help :(
Answer:
Well, I'd assume the heart
Explanation:
because it pumps blood and oxygen and everything really relies on it.
it could also be other important organs such as the brain, heart, kidneys, liver and lungs, but the heart is the root of all the bodies functions working properly.
The Fossil record is the history of life as documented by fossils, the remains or imprints of the organisms from earlier geological periods preserved in sedimentary rock.
Eukaryotes are single cellular organisms so A D C
