<span>humans and animals breathe in oxygen and remove carbon dioxide on the other side of the plants breathe in carbon dioxide and release oxygen. The process of making the air in the atmosphere is in equilibrium. Activities of modern humans burn fossil fuel in large quantity that the concentration of CO2 in the air to be very high while production of O2 has not increased</span>
Answer:
A catalyst is a substance that can be added to a reaction to increase the reaction rate without getting consumed in the process. Catalysts typically speed up a reaction by reducing the activation energy or changing the reaction mechanism. Enzymes are proteins that act as catalysts in biochemical reactions
Explanation: I don't know if this will help but hopefully it does
I am not sure but I think the answer would be A. Since where they live caused them to need to adapt.
Answer:
Blood vessels
Explanation:
It is returned to the heart in the veins. The capillaries connect the two types of blood vessel and molecules are exchanged between the blood and the cells across their walls.
Answer:
Shadows are longest in the early morning and late afternoon/early evening when the sun appears low in the sky. As the Earth rotates on its axis, the sun hits each location in the morning at an angle. ... As Earth continues to spin toward sunset, the increasing angle causes shadows to lengthen!
Explanation:
Hope this helps! Have a good day!.....or not...its up to you- <3
