Please help me!! I need your help. 1. I am present at the end of each bronchiole

2. I control the flow of blood in the heart.

III. Correct and rewrite the following sentences :-

1. Cranium is the only part of the skull which is movable

2. Pulmonary vein carries deoxygenated blood from lungs to heart

the electromagnetic energy from the sun arrives in the form of visible and invisible light.

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.