What is speciation?
The process by which new species arise from existing species.
True or False: Speciation can occur through both gradual and rapid processes.
True
Fill in the blank: The two main types of speciation are ______ and ______.
allopatric, sympatric
What is allopatric speciation?
Speciation that occurs when populations are geographically isolated.
What is sympatric speciation?
Speciation that occurs without geographical separation, often through reproductive isolation.
Multiple choice: What can lead to reproductive isolation? A) Geographic barriers B) Behavioral differences C) Temporal differences D) All of the above
D) All of the above
What is a key factor in the process of allopatric speciation?
Geographic isolation of populations.
True or False: Hybridization can lead to the formation of new species.
True
What is the role of genetic drift in speciation?
Genetic drift can lead to changes in allele frequencies that contribute to speciation.
Fill in the blank: Speciation can result from ______ barriers and ______ barriers.
prezygotic, postzygotic
What are prezygotic barriers?
Factors that prevent fertilization from occurring.
What are postzygotic barriers?
Factors that reduce the viability or reproductive capacity of hybrid offspring.
Multiple choice: Which of the following is NOT a prezygotic barrier? A) Temporal isolation B) Habitat isolation C) Hybrid sterility D) Behavioral isolation
C) Hybrid sterility
What is temporal isolation?
A prezygotic barrier where species breed at different times.
What is habitat isolation?
A prezygotic barrier where species live in different habitats and do not meet.
True or False: Speciation is always a slow and gradual process.
False
What is adaptive radiation?
The rapid diversification of a group of organisms into forms filling different ecological niches.
Fill in the blank: The formation of new species in response to environmental changes is known as ______.
adaptive radiation
What is a common example of allopatric speciation?
Darwin’s finches on the Galápagos Islands.
Multiple choice: Which process can drive sympatric speciation? A) Polyploidy B) Genetic drift C) Natural selection D) Both A and C
D) Both A and C
What is polyploidy?
A condition in which an organism has extra sets of chromosomes, often leading to speciation in plants.
True or False: All species are capable of interbreeding.
False
What is the biological species concept?
Definition of a species as a group of organisms that can interbreed and produce fertile offspring.
