Briefly explain the following terms.

Briefly explain the following terms.

Briefly explain the following terms.

(iv)Diapedesis

64.

Briefly explain the following terms.

(v) Hormones 

State any two harmful effects of noise pollution on human health.

State Mendel's Law of segregation. 

A candidate in order to study the process of osmosis has taken 3 potato cubes and put them in 3 different beakers containing 3 different solutions. After 24 hours, in the first beaker the potato cube increased in size, in the second beaker the potato cube decresed in size and in the third beaker there was no change in the size of the potato cube. The following diagram shows the result of the same experiment:



i. Give the technical terms of the solution used in beaker 1 2 and 3
ii. In beaker 3 the size of the potato cube remains the same. Explain the reason in brief
iii. Write the specific feature of the cell sap of root hair a which helps in absorption of water. 
iv. What is osmosis?
v. How does a cell wall and a cell membrane differ in their permeability?

A candidate in order to study the process of osmosis has taken 3 potato cubes and put them in 3 different beakers containing 3 different solutions. After 24 hours, in the first beaker the potato cube increased in size, in the second beaker the potato cube decresed in size and in the third beaker there was no change in the size of the potato cube. The following diagram shows the result of the same experiment:

i. Give the technical terms of the solution used in beaker 1, 2 and 3. 
ii. In beaker 3 the size of the potato cube remains the same. Explain the reason in brief
iii. Write the specific feature of the cell sap of root hair a which helps in absorption of water.
iv. What is osmosis?
v. How does a cell wall and a cell membrane differ in their permeability?

The figure given below represents an experimental setup with a weighing machine to demonstrate a particular process in plants. The experimental setup was placed in bright sunlight. Study the diagram and answer the following questions:

 (i) Name the process intended for study.

(ii) Define the above mentioned process.

(iii) When the weight of the test tube (A & B) is taken before and after the experiment, what is observed? Give reasons to justify your observation in A & B.

The diagram below represents the simplified pathway of the circulation of blood.

Study the same and answer the questions which follow:

(i) Name the blood vessels labelled 1 and 2.

(ii) State the function of blood vessels labelled 5 and 8.

(iii) What is the importance of the blood vessel labelled 6?

(iv) Which blood vessel will contain a high amount of glucose and amino acids after a meal?

(v) Draw a diagram of the different blood cells as seen in a smear of human blood.