Plant Growth and Development — BIOLOGY STD 11 Science — Question

Differentiate between obligate categories and intermediate categories. Demonstrate with the help of a flowchart.

Make a simple diagram of a flowering plant and show/ label its different parts.

State the condition in which the flowers are described.

1. Perigynous.
2. Epigynous and.
3. Hypogynous.

Give one example of each plant in whih these flowers are found.

Biology teacher was teaching cell cycle in the class. She taught that cell is the basis from which life exists. Also explained well about cell cycle. Robin who was a bright student was facing difficulties in understanding the topic he reached home and asked her sister who is a student of biology in a college about details of cell cycle and cell theory. She explained him that according to cell theory, cells arise from pre-existing cells and the process involved is cell division. Sexually reproducing organisms start their life from a single cell, called zygote, and cell divisions do not stop with the formation of a mature organism, but continue throughout the life.

1. What is meant by cell cycle?
2. Which is the actual phase of cell division?
3. When (at what phase) do the cell organelles duplicate?
4. What values are reflected from the Robin's concern?

What is photorespiration?

Distinguish between the following:
Glycolysis and Citric acid cycle

What is the general structure of Pteridophytes?

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

The lysosomal enzyme does not destroy the cell's own cytoplasm. Why?

Explain different layers of arteries.