One: The cell is able to move material in and out of the cell
Two: It helps the cell maintain necessary conditions for life
I'm pretty sure it's all of the above but i'd have to say body fluid has the most water
Answer:
Oxygen levels stay above 15 percent starting 200 million years ago
Explanation:
Atmospheric oxygen levels are related to the evolution on Earth and changes in geochemical cycles that involve climate variations.
The presence of O
2 and evolution of oxygen gave new opportunities to the life on Earth. Oxygen levels in atmosphere have fluctuated between 15% and 35% of atmospheric volume, since the start of the Cambrian period.
So, form the starting 200 million years ago, oxygen level stay above 15 percent and the correct option is "B".
Smoking and severe sunburn are linked to cancer.Getting a severe sunburn could lead to <span>melanoma skin </span><span>cancer and smoking could lead to lung cancer.
So the answer you are looking for is A. Cancer
I hope this helps!</span>
