Darwin and natural selection Knowledge-Based Download PDF

Questions

1. 1.

   Which condition is a necessary prerequisite for natural selection to produce evolutionary change in a specific phenotypic trait within a population?

   • A) The trait must develop as an acquired characteristic through frequent physical use during an organism's lifetime.
   • B) Every individual within the population must possess an identical physical expression of the trait.
   • C) The surrounding ecosystem must remain completely static and free of selective pressures over time.
   • D) The trait must display variation among individuals in the population, and that variation must be heritable.
2. 2.

   According to Charles Darwin's theory of natural selection, what role do environmental conditions play in the evolutionary adaptation of a population?

   • A) They stimulate individual organisms to develop new anatomical features through purposeful effort during their lifetimes.
   • B) They induce targeted and identical hereditary modifications across all exposed individuals simultaneously.
   • C) They eliminate phenotypic variation by forcing all surviving organisms into a single identical form.
   • D) They determine which preexisting phenotypic variations confer a reproductive advantage, shifting trait frequencies over generations.
3. 3.

   According to Charles Darwin's concept of natural selection, which characteristic best defines an individual organism's evolutionary fitness?

   • A) The physical strength, size, and aggressive dominance it displays within its group
   • B) The total duration of its lifespan compared to the average lifespan of its species
   • C) The number of beneficial traits it acquires through environmental use during its lifetime
   • D) Its relative success in surviving and leaving viable, fertile offspring to the next generation
4. 4.

   Darwin observed that species produce more offspring than can survive on limited environmental resources. Which conclusion did Darwin directly draw from this observation?

   • A) Individuals acquire novel physical traits during their lifetime to adapt to environmental shortages.
   • B) A struggle for existence occurs among individuals, resulting in differential survival.
   • C) Genetic mutations immediately arise in response to resource scarcity to reduce competition.
   • D) Organisms intentionally limit their reproductive output to preserve community resources.
5. 5.

   According to Charles Darwin's theory of evolution by natural selection, which statement describes the primary mechanism that drives evolutionary change in a population?

   • A) Organisms intentionally alter their physical traits during their lifetime to adapt to environmental demands and pass these acquired modifications to offspring.
   • B) Individuals with heritable traits that enhance survival and reproduction leave more offspring, increasing the frequency of those traits over generations.
   • C) Environmental challenges cause directed genetic mutations to occur simultaneously across all individuals to ensure the species survives.
   • D) The strongest and largest individuals invariably survive regardless of local environmental conditions, guaranteeing the continuous perfection of the species.