The correct answer is lipophobic signal messenger.
Lipophobic signal molecules cannot enter cells by simple diffusion through the cell membrane and because of that, these signal molecules bind to receptor proteins on the cell membrane. The response time for pathways linked to membrane receptor proteins is very rapid-within milliseconds to minutes.
The answer is letter C. The distribution of oak trees in an
area.
Population Ecologist would often measure the number
distribution and density of the area. Trees are often measured by plots or by
hectares. This is to know how many trees are situated in that
area.
