(English Medium) ICSE Class 10 - CISCE Question Bank Solutions for Biology

Give reason for the following:

It is better to transplant seedlings in a flower-bed in the evening and not in the morning.

Give reason for the following:

A plant cell, when kept in a hypertonic salt solution for about 30 minutes, turns flaccid.

A leaf cell of a water plant was placed in a liquid other than pond water. After sometime, it assumed a shape as shown below:

1. Give the term for the state of the cell it has acquired.
2. Name the structure which acts as a selectively permeable membrane.
3. Comment on the nature (tonicity) of the liquid surrounding the cell.
4. Name any one feature of this plant cell which is not present in an animal cell.
5. Redraw in the space provided, the diagram of the cell if it is soon placed in ordinary water for some time.

Guttation takes place through:

Name the following: 

The process by which the intact plant loses water in the form of droplets. 

Name the following:

The structure in a leaf that allows guttation.

Name the following:

Loss of water as droplets from the margins of certain leaves. 

Given below is an example of a certain structure and its special functional activity:

Chloroplasts and Photosynthesis

In a similar way, write the functional activity against the following:

Hydathodes and ______

The diagram below represents a stage during cell division. Study the same and then answer the questions that follow: 

1. Name the parts labelled 1, 2, and 3.
2. Identify the above stage and give a reason to support your answer.
3. Mention where in the body this type of cell division occurs.
4. Name the stage prior to this stage and draw a diagram to represent the same.

Given below is a diagram representing a stage during mitotic cell division in an animal cell Examine it carefully and answer the questions which follow.

1. Identify the stage. Give one reason in support of your answer.
2. Name the cell organelle that forms the ‘aster’.
3. Name the parts labelled 1, 2 and 3.
4. Name the stage that follows the one shown above; how is that stage identified?
5. Mention two differences between mitosis and meiosis with regards to:
   1. The number of daughter cells produced.
   2. The chromosome number in the daughter cells.

 Give suitable biological reasons for the following statement: 
Root hairs become flaccid and droop when excess fertilizers are added to the moist soil around them. 

Describe anaphase in mitosis.

Define the following:

Karyokinesis

Fill in the blank:

______ takes place in body cells resulting in growth and development.