Concept:Sexual reproduction creates more genetic variation in offspring than asexual reproduction, which helps species adapt and survive over long evolutionary time.
Explanation:Sexual reproduction involves the fusion of two different gametes, each carrying a unique set of genetic material.
During meiosis, the chromosomes are shuffled, and crossing‑over creates new combinations of genes.
When two parents contribute DNA, the offspring inherits a mix of traits from both.
This produces a wide range of genetic variation among individuals.
Greater variation leads to several survival advantages:
• In a changing environment, some variants may possess traits that help them survive, such as resistance to new diseases or tolerance to climate shifts.
• The population does not rely on a single genetic type; if one variant is wiped out by a disease or predator, other variants remain.
• This diversity prevents the entire species from being destroyed by a single threat, allowing it to persist over many generations.
In contrast, asexual reproduction creates clones—offspring with nearly identical DNA—making the whole population vulnerable to the same threats.
Therefore, the main advantage of sexual reproduction is that it produces more variation in offspring, not merely more offspring or healthier ones.
Answer:Option D: more variation in offspring.