Based on the work of Nicolas de Saussure, what are the two primary sources of mass for
plants

Groups of organisms with low biotic potential, such as gray whales, that produce at most one offspring every other year a) are r-selected b) are k-selected c) are not subject to density-dependent limiting factors d) show the initial stages of the extinction process e) have escaped from the processes of natural selection and adaptation

The body is protected against harmful flu viruses by

What drives the atp synthase reactions that produce atp