(English Medium) ICSE Class 9 - CISCE Question Bank Solutions

Moist germinated seeds were placed in a thermos flask A, and germinating seeds, which were boiled and then soaked in 5 percent formalin, were placed in thermos flask B. Thermometers were inserted in the flask and the mouth of each flask plugged with moist cotton wool. The two flasks were fixed upside down as shown in the fig. 10.9. The temperature on both thermometers was noted. After about 48 hours, the temperature in flask A was found to be much higher than that in flask B.

(a) State the object of using the apparatus.

(b) Explain, why a rise in temperature occurs in flask A.

(c) If 5 percent formalin was not used after boiling the seeds, the temperature of flask B would have risen considerably. Explain.

What is classification of living organism?

How is the classification of living organisms important?

Explain briefly:
Yeast is used in bakeries and breweries.

Write short notes on:
Economic importance of yeast

Give two examples of bryophyta

Give two examples of pteridophyta

Give the name of the
fungus that gives penicillin

Give the name of the
mould that causes Aspergillosis in human beings.

Give the name of the
mould which is known as Red-ring mould.

Give the name of the
mould that causes lung mycosis.

Fill in the blank:
Fungi which is edible is ______.

How are fungi important as food?

Are fungi useful in medical sciences? How?

Name two plant diseases caused by fungi. Also, mention the causal agents.

The question has four options. Choose the correct answer:
Tasteful food for man is

Name three types of levers found in the human skeleton

Who proposed the five kingdom system of classification and when?

On what facts was the five kingdom system of classification based?

What are the kingdoms in the five kingdom system of classification?