Answer:
D. Gross primary productivity is the total amount of solar energy captured by producers through photosynthesis over time.
Explanation:
The gross primary productivity of an ecosystem represents the rate at which the producers of the system capture the solar energy so that they can perform the process of photosynthesis. Therefore, GPP is the total amount of photosynthetic energy captured per unit area over a given time period. Producers consume the part of the GPP for their own respiration and maintenance. Therefore, gross primary productivity is the sum total of the growth of producers per unit area per unit time and the energy used by them for respiration.
Answer:
an increase in the diameter of the skeletal muscles
Explanation:
The muscle adapts to aerobic exercise by an increase in mitochondrial density to provide enough energy to the cell through respiration, an increase in capillary density to supply nutrients to the tissues and increase blood flow, an increase in the number of oxidative fibers to help in energy regeneration and an increase in the concentration of oxidative enzymes.
Answer:
Some children fall ill more frequently than other living in the same area due to their weak immunity, or slow immune system response.