What is modification of plant ? why are different types of plants modified?
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Hope it help

In some plants, the roots change their shape and get modified to absorb and transport water and minerals from the soil to different parts of the plant. They are also modified for support, food storage, and respiration. The root modifications perform two major functions- Physiological and Mechanical.

Explanation:

Some plants modify its stem to absorb the food from another plant. Plants growing in the marshy region has its roots extended outside to support respiration.

it is a learned trait

explanation:

i think that is new experiments yield untrustworthy data and should be carefully considered, because you don't know what will happen with the experiments.