AP BIOLOGY

Detailed explanation-1: -Phloem transport is bidirectional because sucrose gets accumulated in the phloem tissue and absorbs water creating a high turgor pressure. Other areas have low turgor pressure due to loss of water.

Detailed explanation-2: -Assertion :Movement of materials inside phloem is bidirectional, both upwards and downwards.

Detailed explanation-3: -In bidirectional transport, plus-and minus-end directed motors work together on a single cargo, causing it to switch travel directions incessantly [1].

Detailed explanation-4: -Xylem is unidirectional, whereas, phloem is bidirectional.

Detailed explanation-5: -Bidirectional movement means the movement of molecules in two opposite directions. Phloem is bidirectional in terms of transportation, meaning the flow of food is in both the directions. There are two main reasons due to which the xylem is unidirectional, namely positive root pressure and transpiration pull.