Which of the following is a vestigial organ in humans? MCQ with Answer and Explanation

Explanation:
Hydroponics involves growing plants with their roots in a mineral nutrient solution in water, without soil. This allows precise control of nutrients and is used in research and commercial production. Aquaculture is fish farming, tissue culture is in vitro plant propagation, vermiculture is earthworm composting.

Explanation:
Mitosis is equational division producing two genetically identical diploid daughter cells, essential for growth, development, and tissue repair in multicellular organisms. Meiosis produces haploid gametes with variation, binary fission is asexual in prokaryotes, budding in yeast. Mitosis maintains chromosome number.

Explanation:
Polygenic inheritance occurs when a single phenotypic trait is controlled by two or more different genes at different loci, each having an additive effect. Human skin color, height, and eye color are controlled by multiple genes (e.g., at least three genes for skin color). This results in a continuous range of phenotypes, forming a bell-shaped curve in a population.