Cell Cycle and Cell Division — BIOLOGY STD 11 Science — Question

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?

Cyanobacteria and heterotrophic bacteria have been clubbed together in Eubacteria of kingdom Monera as per the “Five Kingdom Classification” even though the two are vastly different from each other. Is this grouping of the two types of taxa in the same kingdom justified? If so, why?

Rearrange the following in the correct order of involvement in electrical impulse movement- Synaptic knob, dendrites, cell body, Axon terminal, Axon.

List out the differences between Monera and Protista.

Describe the three types of neurons based on the number of axons and dendrons, and their locations in human body.

Define water potential and solute potential.

Differentiate between:
a. Open and closed circulatory system
b. Oviparity and viviparity
c. Direct and indirect development

Describe the structure of contractile proteins.