10 Questions
What kind of phenomenon is likely to be responsible for the size difference between males and females in the unknown species of deer?
Sexual dimorphism
What group of organisms commonly speciates by sympatric speciation? How do they do this?
Insects - through specialization on different host plants
Why is hybridization a challenge to the Biological Species Concept (BSC)?
It blurs the distinction between species
What is sexual selection?
The process of natural selection acting on traits that affect an organism's ability to obtain or successfully copulate with a mate
What is intersexual selection?
Choice by one sex, usually females, for certain traits in the other sex, usually males
Does sexual selection exist because it leads to perfectly adapted organisms?
No, sexual selection exists primarily because different sexes have different reproductive strategies
What are the consequences of inbreeding on the genetic structure of a population?
Decrease in homozygosity
What is evolutionary fitness and how is it measured?
It is the number of offspring produced, measured by their quality and quantity.
What is genetic drift and in what sized populations does it occur most readily?
It is the random change in allele frequency, and it occurs most readily in small populations.
What is sexual selection and how does it contribute to evolution?
It is the selection for traits that improve reproductive success.
Test your knowledge about natural selection and sexual selection. Learn about the different modes of natural selection, examples of each, sexual selection theory, intersexual selection, intrasexual selection, and the impact of natural selection on the adaptation of organisms.
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