True/false
Energy and materials follow unidirectional flow.

Energy flow in an ecosystem is unidirectional. Comment.

These questions consist of two statements each printed as Assertoin and Reason. While answering these questions, you are requied to choose any one of the following four responses. If both Assertion and Reason are true and Reason is correct explanation of Assertion If both Assertion and REason are true but Reason is not correct explanation of Assertion If Assertion is true but Reason is false If both Assertion and Reason are false Assertion: Recyling of materials is must for the maintanence of biosphere Reason: Because energy flows unidirectionally in a food chain.

Why it is said that flow of energy is always unidirectional?

Flow of energy through various trophic levels in an ecosystem is unidirectional and non-cyclic . Explain

Choose the correct alternative: Bone shows unidirectional/bidirectional growth.

Movement of substances in xylem is unidirectional. Explain.

Define the following Gene flow

The translocation in phloem is unidirectional whereas in the xylem it is bidirectional.