Anatomy of Flowering Plants — BIOLOGY STD 11 Science — Question

Distinguish between
i. Grey matter and White matter
ii. A stimulus and An Impulse

Write the precise function of:
Collenchyma.

Mention the distinctive characters of cyanobacteria.

Differentiate between Tricuspid and Bicuspid valve.

Analyse the events during every stage of cell cycle and notice how the following two parameters change.
Amount of DNA content (C) per cell.

Why do we consider blood as a connective tissue?

Why is there no mixing of deoxygenated and oxygenated blood in the human heart normally?

Comment on the statement “living state is a non-equilibrium steadystate to be able to perform work”.

The bulk of a plant is made up of dead tissues so that physical strength can be attained and resources can be utilized in a better way. What lesson can be learnt from this strategy of plants? How does focusing on something help us in our life?

1. We should learn to save money so that it can be utilized for better purposes.
2. Instead of wasting our energy on trivial matters, we should focus on more E productive works.
3. Physical exercise is good for a strong body, while mental exercise is good for a strong mind.

For completion of respiration process, write the given steps in sequential manner.

1. Diffusion of gases (O₂ and CO₂) across alveolar membrane.
2. Transport of gases by blood.
3. Utilisation of O₂ by the cells for catabolic reactions and resultant release of CO₂ .
4. Pulmonary ventilation by which atmos-pheric air is drawn in and CO₂ rich alveolar air is released out.
5. Diffusion of O₂ and CO₂ between blood and tissues.