A. There were animals 3 billion years ago; they just weren't fossilized. B. Animals are warm-blooded; the ocean was too cold for animals.
What do you need help with hun
A control group of the experiment is the one in which no treatment or intervention is given. So, in your case, the pea plants in which was not subjected any of the fertilizers, will serve as a control group. This is a negative control. A positive control group is the one in which an established treatment is given, which definitely leads to the production of the desired character. So, in your case, a very good well-known fertilizer which has a positive control on the growth of the pea plant, would serve as a positive control.
Answer:
C. Glucose and oxygen
Explanation:
Photosynthesis takes water, carbon dioxide, and light energy and turns it into cellular energy (glucose) and converts the carbon dioxide into oxygen. Plants are so vital to human life due to this process as they produce both the energy we need and air we breathe to survive.
