Biological Classification — BIOLOGY STD 11 Science — Question

Draw the following structures of Pisum sativum:

1. Diadelphous androecium.
2. Carpel.
3. TS of ovary.

Photosynthesis not only facilitates production of food but also cleans up the environment. Which of the following is similar to this multipronged effect of photosynthesis? Explain how deforestation affects our environment.

1. An automobile not only carries people but also releases carbon dioxide in the air.
2. A cow not only gives milk but also produces methane which is a greenhouse gas.
3. A cow not only gives milk but also produces cowdung which can be used as kitchen fuel.

What are the main steps in aerobic respiration? Where does it take place?

Two groups (A and B) or bean plants of similar size and same leaf area were placed in identical conditions. Group A was exposed to light of wavelength 400-450nm and Group B to the light of wavelength of 500-550nm. Compare the photosynthetic rate of the two groups by giving reason.

Differentiate between the morphology of stems and roots.

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?

What are the main criteria used for five kingdom system of classification?

List out the functions of a museum.

List out some living features of viruses.

Explain the composition of triglyceride.