Question

Two closely related bird species nest in the same trees. They both eat insects. This is an example of: (1 point)
• Mutualism
• Commensalism
• Parasitism
O Interspecific competition
Speciation is the process by which: (1 point)
• Species become extinct
O Species evolve to become more similiar
• Species migrate to new habitats
• New species arise from existing species
Which of the following is an example of reproductive isolation? (1 point)
• Two populations of birds living in different areas
• Gene flow between two populations of fish
O Inability of two different frog species to produce fertile offspring
• Similar mating calls in two populations of crickets
The founder effect is a type of genetic drift that occurs when: (1 point)
• Natural selection favors certain alleles
• A small group of individuals colonizes a new habitat
• There is a high mutation rate in a population
• A population is reduced by a natural disaster

Answer 1

1) Interspecific competition — the two species competing for the same nesting sites and food.
2) New species arise from existing species — that is the definition of speciation.
3) Inability of two different frog species to produce fertile offspring — this is reproductive isolation.
4) A small group of individuals colonizes a new habitat — that describes the founder effect (a form of genetic drift).