Fossils are used to determine the ages of rock layers. Index fossils are the most useful for this.
Primary function of Calvin Cycle
Calvin cycle also known as dark reaction. It occurs in stroma of chloroplast. Its main function is to fix CO₂ into glucose molecule with the help of ATP and NADH₂.
Answer:
The Correct Answer is 4.
Explanation:
Between the Rockies and the Appalachians extends a great plains area, In Canada, they are called interior-plains while in the United States they are called the great plains and the central plains of America.
Much of this region has fertile soil and so much productive land, farmers grow crops like corn, soybeans, wheat, and ranchers raise livestock.
