Nitrogen Fixation: Root and Bacteria Interactions. Nitrogen is an important macronutrient because it is part of nucleic acids and proteins. ... The most important source of BNF is the symbiotic interaction between soil bacteria and legume plants, including many crops important to humans.
Answer:
down syndrome
Explanation:
people with down syndrome have an extra chromosome in the twenty-first pair
Answer:
Option A
Explanation:
Chloroplasts are always located in the cytoplasm of the cell.
