Explanation

• The cell cycle is the sequence of stages a cell goes through to grow and divide.
• DNA synthesis (replication) occurs during the S Phase (Synthesis Phase).

Additional information:

1. G₁ Phase – cell growth before DNA replication
2. G₂ Phase – preparation for cell division after DNA replication
3. M Phase – actual mitosis/cell division

Last verified on 22-01-2026

Explanation

• Soil is home to a wide variety of living organisms that maintain soil fertility.
• Nematodes make up 80–90% of the living animals in soil.

Additional information:

• Nematodes are microscopic roundworms found in almost all soils.
• They help control pests and recycle nutrients for plants.

Last verified on 22-01-2026

Explanation

• Plants absorb light for photosynthesis mainly using chlorophyll pigments.
• The effective range of light absorbed is the visible spectrum that drives photosynthesis.
• Light outside this range is less effective for producing energy in plants.

Last verified on 22-01-2026

Explanation

• Chlorophyll is the green pigment responsible for photosynthesis in plants.
• It captures sunlight and converts it into chemical energy to make food.

• Plants use chlorophyll to produce glucose and oxygen through photosynthesis.
• Chloroplasts contain chlorophyll a and b, which absorb sunlight.

Last verified on 22-01-2026

Explanation

• Chlorophyll is a compound that is called a Chelate.
• Photosynthesis depends on the presence of chlorophyll for the absorption of light.

Additional information:

There are about six closely related chlorophylls:

1. chlorophyll a
2. chlorophyll b
3. chlorophyll c
4. chlorophyll d
5. chlorophyll e
6. chlorophyll f

Last verified on 22-01-2026