Question

Q2 Define the following.


1. Combustion
3. Red Data Book

2. Cell
4. Migration​

Answer 1

Answer:

1.A chemical process in which a substance reacts with oxygen to give off heat is called combustion.

2. A cell is defined as the smallest unit of an organism with a nucleus. An example of a cell is a unit in the tissue of an animal muscle.

3 . Red Data Book is the book which keeps a record of all endangered animals, plants and species. It contains a list of species which are in danger of becoming extinct.

4.Migration is the process or act of migrating, i.e. the movement from one region or place of habitat to another.

Explanation:

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Answer 2

Answer:

1. Combustion - the process of burning something.

2. Cell - In biology, the smallest unit that can live on its own and that makes up all living organisms and the tissues of the body.

3. Red Data Book - A Red Data Book is a document that keeps a record of all the endangered species of animals, plants, and fungi in a country or a state.  

4. Migration​ - Migration is the movement of either people or animals from one area to another.

Explanation:

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