Answer:
A and D i think
Oxygen is ONLY released and others are taken in.
Gas exchange during respiration occurs primarily through diffusion. Diffusion is a process in which transport is driven by a concentration gradient. Gas molecules move from a region of high concentration to a region of low concentration.
Answer:
Photosynthesis is the process in which plants materialize the energy from the sun to create food out of carbon dioxide and water. During this same process of Photosynthesis plants release clean oxygen for other living to breath in.
Explanation:
Answer:
nitrogen and h20
Explanation:
protons:7
neutrons: 7
valence electrons: 5
atoms:hydrogen and oxygen
# of each type: H 2 O 1
atomic mass: H 1.00794 O 15.9994
this is all found on the periodic table btw
Answer:
I think it would be some stones are harder or it maybe just it has just crystallized.
Explanation:
Yes. I think that there are some closely related species of organisms that cannot be identified with a dichotomous key.
Dichotomous key is used to classify objects or organisms based on its physical characteristics. Because of that limitation, there are species that may be related according to the dichotomous key but are in fact not or its relation is very minimal whereas there are organisms that may seem unrelated based on their physical characteristics but are actually from the same ancestors.
