Question

The ultimate source of continuous variations is

• A. Natural selection
• B. Sexual reproduction
• C. Hormonal action
• D. Mutations

Answer 1

The correct option is B Sexual reproduction

Sexual reproduction involves gamete formation and fertilisation. During fertilisation, 1 gamete from each parent combines to form a zygote. Because of recombination and independent assortment in meiosis, each gamete contains a different set of DNA. This produces a unique combination of genes in the resulting zygote and ultimately within the organism.

As reproduction takes place continuously throughout the generation as well as these variations are inheritable, it is the ultimate source of continuous variations.

So, the correct option is 'Sexual reproduction.'