Explanation

• Inflorescence refers to the arrangement of flowers on a plant.
• Safflower (Carthamus tinctorius) belongs to the family Asteraceae.
• Plants of this family typically bear flowers in a capitulum (head) type inflorescence.

Additional information:

• Capitulum is also called a head inflorescence.
• Common examples: sunflower, marigold, and safflower.

Last verified on 23-01-2026

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 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

Explanation

• Honeybees have a unique sex-determination system called haplodiploidy.
• Queen and worker bees develop from fertilized eggs, making them diploid.

Additional information:

• Drones (male bees) develop from unfertilized eggs and are haploid.
• This system helps maintain colony structure and division of labor.

Last verified on 22-01-2026

Explanation

• Plants are classified based on shared characteristics and natural environment.
• A plant species is the basic unit of classification where plants can reproduce among themselves.

Additional information:

• A species is capable of natural reproduction within its group.
• Example: Triticum aestivum (common wheat) is a plant species.

Last verified on 22-01-2026

Explanation

• The study of humans has multiple branches focusing on biology, culture, and history.
• Anthropology specifically studies the evolution and biological development of humans.
• It examines humans as part of the animal kingdom and their physical, social, and cultural traits.

Last verified on 22-01-2026

Explanation

• The process of converting double-stranded DNA into single-stranded DNA is called denaturation.
• It occurs when hydrogen bonds between base pairs break due to heat, extreme pH, or chemicals.
• Denaturation is essential in molecular biology techniques like PCR to separate DNA strands.

Last verified on 22-01-2026

Explanation

• The endosperm is the main storage tissue in maize seeds.
• It containing nutrients like starch, proteins, and oils.
• It support the growth of the embryo during germination.

Last verified on 22-01-2026