These plants have nitrogen fixing bacteria living on their roots to help convert unusable nitrogen into usable nitrogen:
a. mosses
b. fungi
c. algae
d. legumes

Identify the various levels of atmosphere. troposphere mesosphere exosphere stratosphere thermosphere

Monitor and apply fix up strategies

'which of these statements about the scientific method is not true? all experiments must follow the same number of steps in the procedure. experiments may be repeated several times. some unexpected results can be beneficial. experimental results may or may not support the hypothesis.