Biological Classification — BIOLOGY STD 11 Science — Question

Bring out the differences between primary and secondary metabolites. Write an example for each of them.

Write the names of the bones in the forelimb (hand) of a human being. Mention the respective number of each of them.

Give a brief description of the neural system.

Which products formed during the light reactidn of photosynthesis are used to drive the dark reaction?

Water vascular system is the characteristic of which group of the following:

1. Porifera
2. Ctenophora
3. Echinodermata
4. Chordata

Name the part of the alimentary canal where major absorption of digested food takes place. What are the absorbed forms of different kinds of food materials?

While teaching about the chemistry of life, teacher emphasised that carbohydrates, fats, proteins, vitamins and minerals are important for life in addition to water. Akash was under the impression that fats are not good for body and high cholesterol content generally causes heart related and other problems. Therefore, he asked his father who is a doctor about the role of fats in living organisms.

1. What are fats?
2. What is the average percentage of fats present in a cell?
3. How many fatty acid residues are found in one molecule of fat?
4. What values are indicated from Akash's character?

What are the favourable conditions for seed germination?

Name the type of joint between the following:

1. Altas and axis.
2. Carpal and metacarpal.
3. Public bones in the pelivic giodle.
4. Fernur and Acetabulum.

Eichornia crassipes is called as an exotic species while Rauvolfia serpentine is an endemic species in India. What do these terms exotic and endemic refer to?