Explanation

Samuel Hahnemann

• Birth: 1755
• Death: 1843
• Country: Germany
• Principle: “Similia similibus curentur” (like cures like)
• Famous work: Organon of Medicine

Last verified on 30-03-2026

Explanation

• Cotton grows best in black soil which is rich in nutrients and retains moisture.
• Requires a frost-free climate for proper growth and fiber development.
• Black soil is also called Regur soil in India and Pakistan.

Last verified on 23-03-2026

Explanation

• Feldspar is the most abundant mineral in the Earth’s crust.
• It is found in almost all types of rocks (igneous, sedimentary, metamorphic).
• It makes up about 60% of the Earth’s crust.

Last verified on 23-03-2026

Explanation

• In human comfort terms, temperature above 37°C is generally considered hot weather.
• 37°C is also close to normal human body temperature, so higher values feel uncomfortable.
• In many regions, temperatures above this level indicate heat stress conditions.

Last verified on 23-03-2026

Explanation

• Cat and Dog is/are a secondary consumer.
• Because they eats primary consumers (herbivores).
• Like mice, birds, and rabbits.

Last verified on 19-03-2026

Explanation

• Stomata are tiny pores on the surface of leaves that allow gas exchange (CO₂ in, O₂ out).
• They play a key role in photosynthesis and transpiration.
• Number per leaf: Thousands, varies by plant

Last verified on 19-03-2026

Explanation

• The olfactory bulb is a structure in the brain responsible for processing smells detected by the nose.
• It receives signals from olfactory receptor neurons and sends them to other brain regions for interpretation.
• Location: underside of the frontal lobe of the brain

Last verified on 19-03-2026

Explanation

• The ear canal (external auditory canal) transmits sound waves from the outer ear to the eardrum in the middle ear.
• It acts as a conduit, amplifying sound slightly and protecting the inner structures.
• Ear Canal length: ~2.5 cm in adults

Last verified on 19-03-2026

Explanation

• The iris is the colored part of the eye (blue, brown, green, etc.).
• It controls the size of the pupil, regulating how much light enters the eye.

Additional information:

• Pupil – black opening for light
• Cornea – transparent front layer
• Lens – focuses light
• Retina – receives image

Last verified on 19-03-2026

Explanation

• Animal cells do not have chloroplasts, as they are not capable of photosynthesis.
• Animal cells also do not have a cell wall, unlike plant cells and some other organisms.

The components of an animal cell:

• Cell Membrane
• Cytoplasm
• Small Vacuole
• Nucleus
• Chromosomes

Last verified on 18-03-2026