Biotic factors are all of the “alive” factors in the environment which includes all living organisms. Abiotic factors are opposite, are “non alive” factors which may include water,soil,air,rocks,and etc.
The movement in phloem is bidirectional, whereas, in xylem cells, it is unidirectional (upward).
Answer:
plant leaves contain openings called stomata, which allow the diffusion of gas exchange
