Question of Exercise 2

# Question A high concentration of synthetic auxins is generally used for :

Option 1 Control of cell enlargement

Option 2 Weed control

Option 3 Preventing the growth of lateral buds

Option 4 Enhancing root inhibition

Define RQ What is RQ value for fats

Solution:

The ratio of the volume of carbon dioxide released to the volume of oxygen consumed in respiration in a specific length of time under standard temperature and pressure is known as the respiratory quotient (R. Q).

When fats are used as respiratory substrates, they are hydrolyzed into fatty acids and glycerol during seed germination.

The RQ of glycerol after complete oxidation is 0.86.

Because fatty acids have a lower oxygen content than CO2, they require more oxygen to complete oxidation. As a result, O2 absorption is greater than CO2 liberation, and RQ falls below unity.

Final Answer : The ratio of the volume of carbon dioxide released to the volume of oxygen consumed in respiration in a specific length of time under standard temperature and pressure is known as the respiratory quotient (R.Q).

Flexibility in plants is due to

A: Collenchyma

B: Sclerenchyma

C: Parenchyma

D: Chlorenchyma

Solution:

Explanation:

The presence of collenchyma gives plants their flexibility.

Collenchyma tissue is found beneath the epidermis of the leaf stalk and offers mechanical support to the plant.

The correct Option is (A) : Collenchyma.

Define the following Biopatent

Solution:

Explanation:-

Biopatent is a patent granted to an inventor in the sector of biology for his biological products, biological processes and biological concept or design.

It is granted by the government.

Biopatent provides the right to the individual to stop commercial use of his invention.

For example - Neem based products, turmeric etc.

Hence, this is the definition for biopatent.

Describe the important characteristics of gymnosperms

Solution:

Explanation :-

Gymnosperms are seed producing vascular plants.

Gymnos - naked, and sperma - seeds, i.e seeds are not produced inside the fruits.

The important characteristics of gymnosperms are as follows :-

• Gymnosperms means plants with naked seeds.
• They are mainly perennial or woody.
• Their stem can be branched or unbranched.
• Tap root system present.
• Flowerless plants.
• Pollination mainly occurs through wind.
• They produce two different kinds of spores i.e microspore and megaspore.
• They have needle-like leaves.
• Xylem does not have vessels.
• Phloem does not have sieve tube and companion cells.

Hence, these are the features and importance for gymnosperms.

Tissue that transports food in plants

Solution:

Explanation :-

Plants store their food in the form of starch. This starch is stored in a simple permanent tissue known as parenchyma.

Cells of parenchyma are loosely packed.

Its cells are living.

Intercellular space is present between the cells.

Cells may be round or oval, and the cell wall is made up of cellulose.