Explanation

• Carbon dioxide (CO₂) and oxygen (O₂) move in plants through stomata.
• Stomata are tiny pores present on leaves.
• These gases move by diffusion, not active transport.
• They are essential for photosynthesis and respiration.

Last verified on 25-06-2026

Explanation

• The Sun is the ultimate and main source of energy on Earth.
• It provides energy through solar radiation (light and heat).
• All forms of energy on Earth directly or indirectly come from the Sun.
• It supports life, climate, and ecosystems on Earth.

This energy is then converted into various forms, such as:

• Thermal energy (heat)
• Kinetic energy (wind, water currents)
• Electrical energy (generated from solar panels)
• Chemical energy (fossil fuels, biomass)
• Biological energy (food chains, ecosystems)

Last verified on 16-06-2026

Explanation

• Ocean water is not drinkable due to a high amount of sodium chloride (common salt).
• This salt makes water too salty for human consumption.
• Seawater also contains small amounts of other dissolved minerals.
• High salt concentration causes dehydration in the human body.

Last verified on 25-06-2026

Explanation

• GMO stands for Genetically Modified Organism.
• It refers to an organism whose genetic material (DNA) has been changed using genetic engineering techniques.
• GMOs are developed to improve traits such as disease resistance, increased production, or better quality.

Last verified on 16-06-2026

Explanation

• Omnivores are NOT an abiotic factor; they are a biotic (living) factor.
• Abiotic factors are non-living components of the environment such as soil, temperature, and sunlight.
• Omnivores are organisms that eat both plants and animals.
• Environmental factors are divided into biotic and abiotic components.

Last verified on 25-06-2026