Biology 1st Paper CQ-Barishal Board-2021

What are limiting factors?

What do you mean by Kranz anatony?

Describe the steps in the 'P' process mentioned in the stem.

'Q' process mentioned in the stem is important in the industry - Analyse it.

What is perianth?

Why is Cycas a dioecious plant?

The coral like roots are cxamples of symbiosis of that plant which is mentioned in tigure ' $A$ ' of the stem-Explain.

The flowers, fruits and fertilization process of the plant group in figure ' $\Lambda$ ' and ' $B$ ' of the stem are different - Analyse.

What is syngamy?

Why is emusculation done in artificial hybridization?

Explain why the ' $\mathrm{M}$ ' process of the stern is important.

Fruits having the quality of mother plant are available the 'N' process of the stem- Analyse.

What is aestivation?

Why is Cycas called heterosporic plant?

Explain the intemal structure of the root of the second plant with labelled diagram mentioned in the stem.

According to the first plant of the stem there are different types of meristematic tissues are shown in the stem of plant - Analyze.

What is mitotic index?

Why is the cell-cycle important in the life of an organism?

Grouth of the body is not possible without the first type of cell division of the stem; again, problems arise even if this division is uncontrolled- Explain.

For the continuity and diversity of life requires the second kind of division - Analyse.