A. social age
b. chronological age
c. psychological age
<span>d. biological age
Its D, biological age.</span>
They contain symbiotic bacteria called rhizobia within nodules in their root systems, producing nitrogen compounds that help the plant to grow and compete with other plants. When the plant dies, the fixed nitrogen is released, making it available to other plants; this helps to fertilize the soil.
Answer:
c. DNA provides the information to make proteins for the cell.
Answer:
D
Explanation:
Population is generalized to all individuals.
