I would say that the answer is C, since variations in crop restore the nitrogen in the soil from certain bacteria growing on the root of beans, including legumes.
I would expect the liver cell to have SMOOTH ENDOPLASMIC RETICULUM in abundant.
Smooth endoplasmic reticulum is one the membrane bound organelles found in the cell. The function of smooth endoplasmic reticulum is dependent on the location where it is found in the cell. Generally, it is an organelle which is usually involved in the catabolism and synthesis of some substances. In the liver cell, smooth endoplasmic reticulum is involved in the breaking down of harmful substances, turning them into harmless substance which are not toxic to the cells.
Answer:The polar climate regions are characterized by a lack of warm summers. Every month in a polar climate has an average temperature of less than 10 °C (50 °F). Regions with polar climate cover more than 20% of the Earth's area.
Explanation:
https://en.wikipedia.org/wiki/Polar_climate
you may search this link
Here are the solutions:
A. Questions
B. Experimentation
C. Supported
D. Rejected
E. Related
F. Theory.