1. mother to fetus 2. through exposure to the antigen (virus, toxins, or cancer cells).
Answer:
How plants work and about plants, so agriculture?
Explanation:
P.S.
Hope this helps :)
Also tell me if this is wrong*
Answer:the decline of lichens is an important indicator of an imbalance in the ecosystem. this research can help system ecologists predict how pollution will affect the entire ecosystem
Explanation:
Most of the water is salt water
