What r some facts about gymnosperms

Explain why biological control methods are generally environmentally superior to chemical pest control methods.

Is a measure of the different types of organisms in a community. question options: tertiary secondary primary none of the above

Match the correct terms to their descriptions a system in which only energy but not matter is exchanged frozen water in snow part of geosphere that includes only soil a thin layer between the troposphere and the stratosphere cryosphere tropopause closed system pedosphere