Darwin's theory of evolution is primarily based on the concept of: MCQ with Answer and Explanation

Explanation:
Genetic drift is a random change in allele frequency, more pronounced in small populations, and can reduce genetic diversity. Natural selection leads to adaptation.

Explanation:
The sternum, or breastbone, is a flat bone located in the center of the chest, to which the ribs attach. The clavicle, commonly known as the collarbone, connects the arm to the body, running horizontally above the first rib. The scapula, or shoulder blade, is a flat, triangular bone located on the upper back, forming the posterior part of the shoulder girdle. All statements are correct.

Explanation:
The Hardy-Weinberg principle states that allele and genotype frequencies in a population will remain constant from generation to generation in the absence of evolutionary influences (like mutation, selection, gene flow, genetic drift, and non-random mating). It describes a theoretical, non-evolving population (genetic equilibrium) and provides a mathematical baseline (p2 + 2pq + q2 = 1) to measure evolutionary change.