Question

Assertion: Biological evolution, defined by Charles Darwin in his Origin of Species (1859) as "descent with modification,"

Reason: During reproduction, parental genomes are replicated to produce new copies for the offspring, but replication is not perfect, and heritable mutations continuously introduce genetic novelties.

• A. Both assertion and reason are true
• B. Only assertion is true
• C. Only reason is true
• D. Both assertion and reason are false

Answer 1

The correct option is A Both assertion and reason are true

Biological evolution, defined by Charles Darwin in his Origin of Species (1859) as "descent with modification," is a very simple yet meaningful phrase to describe evolution. Organinsms reproduce, exchange information and during replication, the parental genomes are replicated to produce offspring. But this replication is not always completely errorless. There are heritable mutations that may be introduced that lead to new genes. Furthermore, sexual reproduction causes the re-shuffling of chromosomes into different combinations, so individuals acquire variant genomes, thus giving them different traits (or trait values).