CC Biologia: Speciation

What is a characteristic of the Tuatara?

• It lives for more than 100 years.

• It has jaws that move side to side like a saw.

• It can track the sun's movement with a third eye.

• All of the above.

Why is the Tuatara considered a "living fossil"?

• It is a hybrid species.

• It has remained largely unchanged since the Jurassic period.

• It can reproduce with other species.

• It has a unique third eye.

What defines a species according to the biological concept of species?

• Groups of organisms that look similar.

• Groups of organisms that live in the same area.

• Groups of organisms that can potentially reproduce with each other and produce fertile offspring.

• Groups of organisms that share a common ancestor.

Which of the following is a prezygotic barrier that prevents two species from reproducing?

• Producing infertile hybrid offspring.

• Having different numbers of chromosomes.

• Mating seasons that do not overlap.

• Hybrid offspring that fail to develop.

What is a postzygotic reproductive barrier?

• A barrier that prevents fertilization from occurring.

• A barrier where fertilization occurs, but the hybrid offspring does not survive or is sterile.

• A barrier where two populations are geographically isolated.

• A barrier caused by differences in mating rituals.

What is the primary factor that leads to allopatric speciation?

• Differences in mating behaviors.

• Geographic isolation between populations.

• Sexual selection for specific traits.

• Polyploidy leading to extra chromosomes.

How can sexual selection contribute to sympatric speciation, as seen in cichlid fish?

• Geographic barriers prevent different colored fish from mating.

• Females prefer males with specific color patterns, leading to reproductive isolation.

• Pollution causes fish to develop extra chromosomes, preventing interbreeding.

• Different fish populations adapt to different depths, preventing them from encountering each other.

Which process can lead to the rapid formation of new species, sometimes in a single generation, due to offspring inheriting more than two pairs of chromosomes?

• Allopatric speciation.

• Sexual selection.

• Polyploidy.

• Habitat differentiation.