In the biological sense, how is fitness determined?

• A. By the number of offspring an organism produces that survive to reproduce
• B. By the physical strength and size of an organism
• C. By the lifespan of an organism
• D. By the ability of an organism to find food

Answer: (A)

Verified step by step guidance

1. Understand the concept of biological fitness: In biology, fitness refers to an organism's ability to survive and reproduce in its environment. It is not solely about physical strength or size.
2. Consider the role of reproduction: Biological fitness is often measured by the number of offspring an organism produces that survive to reproduce themselves. This is because the ultimate goal of an organism is to pass on its genes to the next generation.
3. Evaluate survival and reproduction: An organism's fitness is determined by its ability to produce viable offspring that can also reproduce. This involves both survival and successful reproduction.
4. Analyze the options: Compare the given options with the concept of biological fitness. The correct answer should align with the idea that fitness is about reproductive success and the survival of offspring.
5. Conclude with the correct understanding: The option that best fits the definition of biological fitness is the one that emphasizes the number of offspring that survive to reproduce, as this directly impacts the genetic contribution to future generations.