Males tend to determine the sex of the baby depending on whether sperm is carrying and X or Y chromosome. An X chromosome combines with a mothers X chromosome to make XX (Girl). A Y chromosome from a male will combine with a mothers X chromosome to make an XY (Boy).
Forest ecology is the scientific study of the interrelated patterns, processes, flora, fauna and ecosystems in forests.
A forest ecosystem is a natural woodland unit consisting of all plants, animals and micro-organisms in that area functioning together with all of the non-living physical factors of the environment.