Explanation

• An ecosystem consists of living organisms (biotic components) and non-living factors (abiotic components).
• Biotic components include plants, animals and microorganisms.
• Abiotic components include air, water, soil, sunlight and temperature.

Last verified on 08-11-2026

Explanation

• Seafood, especially sea fish and seaweed, are rich in iodine, a mineral vital for thyroid function.
• Iodine is naturally present in the ocean, making marine foods the best dietary source.

Last updated 07 Nov 2026 by NA

Explanation

• Cartography is the science and art of creating maps to represent geographical areas.
• It includes designing, drawing, and interpreting maps for navigation and study.

Last updated 06 Nov 2026 by NA

Explanation

• A locus is the specific physical position of a gene on a chromosome.
• Each gene occupies a particular locus on a chromosome.
• The plural of locus is loci.
• Different forms of the same gene, called alleles, occupy the same locus on homologous chromosomes.

Last verified on 07-11-2026

Explanation

• Plants need gas exchange for photosynthesis and respiration.
• Exchange of CO₂, O₂, and water vapor occurs through stomata on leaves.
• Stomata are tiny pores controlled by guard cells.

Additional information:

• Helps maintain internal water balance and gas diffusion.
• Essential for growth, energy production, and transpiration.

Last verified on 22-01-2026