What is this phenomenon known by neuroscientists? Peter suffers damage to his left frontal lobe and loses the ability to speak but can still understand speech. Despite the permanance of his damage, he is able to recover some of his speech due to his brains ability to take over the lost function.
A. Flexibility
B. Adaptiveness
C. Plasticity
D. Compensation
E. Homeostasis

The correct answer is - plasticity.

Explanation:

Neuroplasticity, brain plasticity or plasticity of the brain is the ability of brain to develop of change throughout the life. In this case peter suffers damage or injury in his frontal lobe that stores learned ability.

As he lost ability of speak however still can understand the speech and he is still able to recover as brain has neuroplasticity that helps in recovering the lost function.

Thus, the correct answer is - plasticity.

b.

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.