2019 years have humans been on earth
atom, molecule, cells, tissues, organ, organ system, organism
The substrate is the part that sticks into the active site of an enzyme.
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.
