Animal Kingdom — BIOLOGY STD 11 Science — Question

Name the categories of plant hormones concerned with each of the following and describe one other function of each of the three categories of plant hormones.

1. Inhibition of seed germination.
2. Promote flowering.
3. Cell division promoting activity.

During a painting class, the teacher asked students to draw a sketch and paint it by using only green colour. Ravi could not find green colour in his colour box and was scolded by the teacher who could easily see the green colour in the box. Suddenly teacher realised that Ravi was not able to identify the green colour and he could realise the fact that Ravi may be lacking the ability to differentiate colours. After school was over, teacher reported this matter to Ravi's parents.

1. Did Ravi lack knowledge of colours?
2. How do you perceive the colour of an object?
3. Discuss the function of cones.
4. What values did teacher possess?

The two kingdom classification system placed bacteria, algae, blue-green algae, fungi, mosses, ferns, gymnosperm, and angiosperms, together under one single kingdoms-Plantae. According to you, what could have been the basis of such classification.

Show the structure of a renal corpuscle with the help of a diagram.

How is the mycorrhizal association helpful in absorption of water and minerals in plants?

Draw a diagram showing comparison of diploblastic and triploblastic organization.

Draw a neat diagram of skeletal and smooth muscular tissue.

Hairs in the inner lining of the nasal cavity prevent dust from getting inside the lungs. This is similar to which of the following? Why should we avoid breathing through mouth?

1. Air filters in automobiles prevent dust from getting into the carburetor
2. A sieve is used to filter out impurities from a substance

Answer the following questions in respect of cockroach:

1. What is meant by paurometabolous?
2. What is the function of gizzard and malpighian tubules?
3. Write the scientific name of cockroach.

Find out how much cellulose is made by all the plants in the biosphere and compare it with how much of paper is manufactured by man and hence what is the consumption of plant material by man annually. What a loss of vegetation!