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

Absorption of water from soil by dry seeds increases _____________, the thus helping seedlings to come out of soil.

Explain briefly the following terms with suitable examples:- protonema

How do you represent the following by symbols in a floral formula?

1. Bisexual.
2. Zygomorphic.
3. Actionomorphic.
4. Superior ovary

What is vital capacity? Compared to the atmosphere, there may be partial pressure of O₂ and CO₂ on various parts involved in diffusion.

What is fermentation? Name any two organic compounds produced in the process.

Bile juice contains no digestive enzymes. Yet, it is essential for digestion. Why?OR
Bile juice has no digestive enzymes, yet, it is important for digestion. Give reason.

Give a brief description of the neural system.

Write any four functions of chromatin and draw a labelled diagram of a chromosome including kinetochore.

Rahul exercises regularly by visiting a gymnasium. Of late he is gaining weight. What could be the reason? Choose the correct answer and elaborate.

1. Rahul has gained weight due to accumulation of fats in body.
2. Rahul has gained weight due to increased muscle and less of fat.
3. Rahul has gained weight because his muscle shape has improved.
4. Rahul has gained weight because he is accumulating water in the body.

Write the name of units of these flower parts.

1. Calyx.
2. Corolla.
3. Androecium.
4. Gynoecium.