A cell can only respond to signals from other cells, not from the physical environment. receptor activation. The ability of a specific tissue or organ to respond to the presence of a hormone is dependent on: the presence of the appropriate receptors on the cells of the target tissue or organ.
They are considered to have originated from cyanobacteria through endosymbiosis—when a eukaryotic cell engulfed a photosynthesizing cyanobacterium that became a permanent resident in the cell
Ggbb = gray hair and red eyes
ggBB = white hair and black eyes
GgBb = gray hair and Black eyes
ggbb = white hair and red eyes
That is incorrect your brain has same amount of synapses
