Answer:
For early earth, it was filled with loads of oxygen and could kill humans if they breathed the oxygen that was in the air about 100 million years ago. This massive amount of oxygen cause massive creatures like the dinosaurs to exist. Current earth has an atmosphere with not too much oxygen.
Explanation:
brainliest
Xylem and phloem fiber cells
Answer:
crab and lobster
Explanation:
they have the most similar genetic background
Sensory processes are responsible for converting sensory messages into neural impulses