Plant Kingdom — BIOLOGY STD 11 Science — Question

Mention key differences between xylem and phloem.

Differentiate between fibrous joints and cartilaginous joints with an example of each.

It is absolutely not necessary to produce amylase in an inactive form in our body, but it is not so in the case of trypsin. Give reason.

Name two hormones which act on the hepatocytes.

With holding of any one nutrient in plant may cause one or another type of deficiency in case of plants. Discuss.

Write any four physiological effects of stress hormone and draw a diagram of arithmetic and geometric growth.

A process is occurring throughout the day, in ‘X’ organism. Cells are participating in this process. During this process ATP, CO and water are evolved. It is not a light dependent process.

1. Name the process.
2. Is it a catabolic or an anabolic process?
3. What could be the raw material of this process?

What makes carbon monoxide more harmful to animals than carbon dioxide?

1. Name the pigment found in the root nodules of legumes.
2. How does this pigment protect the enzyme nitrogenase?

OR
Which substance imparts pink colour to the root nodules of leguminous plants? State its function.

Plants and animals grow by mitotic cells division. What difference do they exhibit bit in their growth?