(English Medium) ICSE Class 10 - CISCE Important Questions for Biology

Which one of the following helps in the opening of stomata?

Study the diagram given below and fill in the blanks with suitable words:

In order to prove that carbon dioxide is necessary for

(a) ______, a potted plant is placed in dark for 48 hours to (b) ______ the leaves. A part of a leaf is inserted into a conical flask containing potassium hydroxide solution. This is to absorb (c) ______ from the flask. The plant is then placed in sunlight for a few hours. The experimental leaf is tested for starch. The part of the leaf that was inside the conical flask turns (d) ______, whereas the part of the left outside turns (e) ______ in colour.

Expand the abbreviation - NADP.

Assertion (A): All food chains begin with herbivores.

Reason (R): Green plants are heterotrophs.

Sam observed a slide containing the lower epidermis of a leaf under a microscope. A number of tiny openings between the epidermal cells were present as shown below in the diagram:

What are these tiny openings called?

Sam observed a slide containing the lower epidermis of a leaf under a microscope. A number of tiny openings between the epidermal cells were present as shown below in the diagram:

Name the cells that regulate the opening and closing of the structures.

Sam observed a slide containing the lower epidermis of a leaf under a microscope. A number of tiny openings between the epidermal cells were present as shown below in the diagram:

Which ion is responsible for the opening and closing of the openings?

Mention the significance of the following mineral:

Magnesium for green plants.

Draw a neat, labelled diagram of a chloroplast.

What is Parthenocarpy?

Name the following:

A gaseous plant hormone which promotes the ripening of fruits.

Study the diagram given below and answer the questions that follow:

1. Name the phenomenon depicted by the shoot in the above diagram.
2. Which plant hormone plays an important role in the above movement?
3. Complete and rewrite the given statement by filling in the correct terms:
   Shoots show positive ______ whereas, roots show positive ______.

Read the explanation given below and name the structure:

Food conducting tissue in vascular plants.

Give one example of Parthenocarpy.

The international health organisation which educates people in accident prevention.

Antibiotic and Antibody [Source]

Give biological reasons for the following:

Some women have facial hair like heard and moustache.

The immunity acquired by providing readymade antibodies from outside for treating certain infectious diseases.

Differentiate between Red Cross and WHO (one activity)

Give scientific reasons: Injury to medulla oblongata leads to death.