Question

14 which of the following can convert nitrogen in the air into a form plants can use?
a bacteria
b fungi
c protists
d animals
15 what condition is caused by carbon dioxide, methane, and water vapor trapping heat in the earth’s atmosphere?
a biomagnification
b greenhouse effect
c photosynthesis
d transpiration

Explanation:

Question 14

Nitrogen fixation is the process of converting atmospheric nitrogen (\(N_2\)) into a form usable by plants. Certain bacteria (like rhizobia in root nodules) perform this. Fungi, protists, and animals don't fix nitrogen from the air for plant use.

The greenhouse effect is caused by gases (CO₂, methane, water vapor) trapping heat in the atmosphere. Biomagnification is toxin accumulation in food chains. Photosynthesis is CO₂ uptake by plants. Transpiration is water loss from plants.

Answer:

a. Bacteria

Question 15