Answer:
trees give oxygen to humans and animals Wich they need to breath in order to survive, by planting many kinds of trees the rare and the species that are going extinct can be preserved and trees also protect the land from salinity and soil degradation, they also protect the land from floods.
A conditioned stimulus when paired with a bell. When the bell was rang food was presented. So upon hearing the bell the dog would salivate because he knew simply put food would then follow. This became known as classical conditioning.
Answer:
both can do sexual offspring
Explanation:
bud that's one of them
This is known as the pericardium
