Two atoms interact with each other as shown by the equation. Complete the equation by filling in the missing parts.

The concept of keystone species is controversial among ecologists because most organisms are highly interdependent. if each of the trophic levels is dependant on all others how can we say one is most important

Multicellular organisms use cell division, mitosis, for growth and the maintenance and repair of cells and tissues. single-celled organisms may use cell division as their method of reproduction. regardless of the reason for mitosis, the process ensures genetic continuity. what is the step in the cell cycle that ensure genetic continuity?

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?