The structure that connects the bones and allows movement is: MCQ with Answer and Explanation

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.

Explanation:
Thyroxine (T₄) and triiodothyronine (T₃) are synthesized by thyroid follicular cells. They regulate basal metabolic rate, growth, and development. Iodine is essential for their synthesis.

Explanation:
Agarose gel electrophoresis separates DNA fragments by size under an electric field; smaller fragments migrate faster. PCR amplifies DNA, sequencing determines base order, cloning produces copies.