If a plant has 18 chromosomes how many would be present in each of its gametes

What does natural resource management aim at ?

This is collection of data made by comparing objects in standard units. in science, the units are metric.

What is point source pollution of an aquatic ecosystem? a) pollution of freshwater sources b) pollution from many sources that combine into one c) pollution that occurs over a wide area; water that runs off from fields, parking lots, and other land surfaces d) pollution that can easily be identified with a single discharge source, such as an open pipe which drains into a body of water