Photosynthesis I think im not 100% sure beb
Answer:
oxygen enters blood cells by 'diffusion'
A very steeply sloped seafloor
Answer:
It would contain four electrons.
Explanation:
A neutral atom has equal numbers of protons and electrons. Therefore, a neutral atom with four protons will also have four electrons.
FYI an atom with four protons is an atom of the element beryllium, Be.
