There are four major classes of biological macromolecules:
carbohydrates.
lipids.
proteins.
nucleic acids.
The double membrane. It's theorized that chloroplasts used to be their own single-celled organism in the environment (and therefore with its own membrane). Then, the theory states, a larger cell took in the chloroplast by endocytosis, which involves surrounding the chloroplast in the large cell's own membrane. The chloroplast would then have two membranes surrounding it. This is similar to the thinking for mitochondria becoming an organelle as well. Hope this helps! :)
The cerebellum which is a part of the brain would be responsible for the motor control,sensory perception,human movement and coordination. If there is then a damage the person may have problems in coordination as well as the senses would be loss.
All three genes are linked,and gene 2 and 3 area are strongly linked
