Morphology of Flowering Plants — BIOLOGY STD 11 Science — Question

Describe the endocrine functions of thymus. (Any four)

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 is refered to as satellite chromosome?

How do lichens exhibit symbiosis?

Match Column I with Column II.

S. No	Column I	S. No	Column II
(a)	Basophils	1.	6-8%
(b)	Lymphocytes	2.	60-65%
(c)	Neutrophils	3.	0.5-1.0%
(d)	Monocytes	4.	20-25%

How does haemoglobin help in the transport of oxygen from lung to tissues?

State what will happen if plants are supplied with,

1. Low content of nitrogen.
2. Excess of sulphur.

Write the name of sex organs in pteridophytes and briefly describe them.

Differentiate between pith in dicot root and monocot root.