Assertion (A): Collenchyma is composed of long and narrow cells. These cells have very thick walls due to the deposition of lignin.

Reason (R): Collenchyma stores food and provides temporary support to the parts of a plant.

1. A is True and R is False.
2. A is False and R is True.
3. Both A and R are True.
4. Both A and R are False.

Assertion (A): Tracheids are made up of elongated dead cells with large cavities without any contents.

Reason (R) : Tracheids help in the conduction of prepared food from the leaves to other parts of a plant.

1. A is True and R is False.
2. A is False and R is True.
3. Both A and R are True.
4. Both A and R are False.

Assertion (A): Cardiac muscles are striated, uninucleated and branched. Cells are relatively short and located in the muscles of the heart.

Reason (R): Cardiac muscles can contract without outside stimulation and do not get tired easily.

1. A is True and R is False.
2. A is False and R is True.
3. Both A and R are True.
4. Both A and R are False.

Given below is the structure of a specific cell found in the body of animals and humans. Read the information below the diagram and fill in the blanks:

The above mentioned cell is found in all the part of body but richly located in the brain and spinal cord. The tissue formed by these cells is concerned with the perception and responses of animals.

The cell shown above is the basic structural and functional unit of the (a) …………… . Each cell consists of a round or oval body, called (b) …………… containing the nucleus. It has one or more elongated hair-like extensions called (c) …………… or …………… . One of these extensions is very long and is termed as (d) …………… . Many of these extensions are bundled together to form a (e) …………… .