It is known as a concentration gradient which in diffusion will always flow from ares of high concentration to areas of low concentrations
So i believe the answer to this is A.
It enables photosynthesis by facilitating primary growth of the plant
Hooks c. streamlined bodies
. tentacles .
The nucleus is responsible for storing dna as well as the instuctions for protein synthesis
Are recessive genes like a dominant gene will all ways be a characteristic of the cell DNA