Hydrogen peroxide (H₂O₂) is a water molecule with an extra oxygen atom. It is very unstable and breaks down readily into water and a single oxygen molecule. So in nutshell, when Hydrogen peroxide readily loses active oxygen, Water is formed.

Correct Option: B

Hydrogen peroxide (H₂O₂) is a water molecule with an extra oxygen atom. It is very unstable and breaks down readily into water and a single oxygen molecule. So in nutshell, when Hydrogen peroxide readily loses active oxygen, Water is formed.

Since alpha particles are high in ionizing power, it is difficult for them to penetrate matter thoroughly. This is because alpha particles are likely to ionize the first thing they come into contact with; thus, they hold a small range of penetrating power. Beta rays have intermediate; while, Gamma Rays and X Rays have maximum penetrating power.

Correct Option: B

Since alpha particles are high in ionizing power, it is difficult for them to penetrate matter thoroughly. This is because alpha particles are likely to ionize the first thing they come into contact with; thus, they hold a small range of penetrating power. Beta rays have intermediate; while, Gamma Rays and X Rays have maximum penetrating power.

Ascorbic acid: also known as vitamin C; Chlorophyll: green photosynthetic pigment found in plants, algae, and cyanobacteria; Carotenoids: known to be potent quenchers of singlet molecular oxygen; Superoxide dismutase: an enzyme found in all living cells.

Correct Option: A

Ascorbic acid: also known as vitamin C; Chlorophyll: green photosynthetic pigment found in plants, algae, and cyanobacteria; Carotenoids: known to be potent quenchers of singlet molecular oxygen; Superoxide dismutase: an enzyme found in all living cells.

Photoperiodism is the developmental responses of plants to the relative lengths of light and dark periods. It affects the vegetative growth as well as the time of flowering and fruiting in plants. For example, some annual plants may be made to complete their life cycle twice in a year, while others can be made to take on characteristics of everlasting flowering species and continue to produce flowers and fruits on an indefinite period, while in yet other species the plant may continue vegetative development indefinitely without flowering.

Correct Option: A

Photoperiodism is the developmental responses of plants to the relative lengths of light and dark periods. It affects the vegetative growth as well as the time of flowering and fruiting in plants. For example, some annual plants may be made to complete their life cycle twice in a year, while others can be made to take on characteristics of everlasting flowering species and continue to produce flowers and fruits on an indefinite period, while in yet other species the plant may continue vegetative development indefinitely without flowering.

Proteins from animals are called ‘first class’ proteins – they provide all the essential amino acids, including those that the body can’t make. Proteins from plants are ‘second class’ proteins.

Correct Option: D

Proteins from animals are called ‘first class’ proteins – they provide all the essential amino acids, including those that the body can’t make. Proteins from plants are ‘second class’ proteins.