Consider the following statements,

1. Litmus solution is a purple dye that is extracted from lichen and is commonly used as an indicator.

2. Red cabbage leaves, turmeric, coloured petals of some flowers, etc., indicate the presence of acid or base in a solution.

3. Some substances whose odour changes in acidic or basic medium, are called olfactory indicators.

Which of the statements given above are correct?

Consider the following statements:

$1$. Carl Linnaeus is the Father of the Binomial Nomenclature of organisms.

$2$. Linnaeus is also known as the Father of Indian Systematic Botany.

$3$. De Candolle coined the word ‘Taxonomy.’

Which of the statements given above are correct?

The advantage of using a fuel cell in a motor car could be:

1. Low initial cost.

2. Emission less operation.

3. Lightweight

4. Freedom from refueling.

Select the correct option.

Consider the following statements about the sound passing through a gas,

$1$. The pressure of the gas at a point oscillates in time.

$2$. The position of a small layer of the gas oscillates in time.

Which of the statements given above is/are correct?

Consider the following statements about the cell organelles of the organisms,

$1$. A mitochondrion contains outer and inner membranes composed of phospholipid bilayers and proteins.

$2$. Chloroplasts are the food producers of the cell.

$3$. The chloroplasts help in the synthesis of the fatty acid.

Which of the statements given above is/are correct?

Medicines are more effective if they are used in:

1. Gaseous state

2. Colloidal state

3. Solid-state

4. Solution state

Select the correct option:

Consider the following functions of xylem:
1. Conduction of water.
2. Conduction of minerals.
3. Mechanical support.

Which of the function(s) of xylem given above is/are correct?