Speciation

Open Ended

Describe how reproductive isolation can lead to the formation of new species.

Multiple Choice

Why is the process of speciation important for biodiversity?

• It increases the variety of life forms on Earth

• It reduces the number of species

• It prevents evolution

• It stops natural selection

Multiple Choice

Which of the following is a requirement for organisms to be considered the same species according to the biological species concept?

• They must share a common chromosome number.

• They must live in the same environment.

• They must have the same color.

• They must eat the same food.

Multiple Select

Which of the following are examples of pre-zygotic isolation barriers?

• Geographic isolation

• Hybrid infertility

• Behavioural isolation

• Temporal isolation

Open Ended

Explain how post-zygotic barriers contribute to the maintenance of species boundaries.

Fill in the Blanks

Mules are sterile because they cannot form a complete set of

pairs.

Multiple Choice

What is adaptive radiation?

• The rapid diversification of a single ancestral line into various species adapted to different niches.

• The extinction of species due to competition.

• The process by which species migrate to new environments.

• The gradual change of a species over time without diversification.

Multiple Choice

Which of the following best distinguishes allopatric speciation from sympatric speciation?

• Allopatric speciation involves geographic isolation, while sympatric speciation does not.

• Allopatric speciation is caused by behavioral isolation only.

• Sympatric speciation requires a physical barrier.

• Sympatric speciation cannot occur in plants.

Multiple Choice

Which of the following statements best explains why polyploidy can cause instant speciation in plants?

• Polyploidy increases the mutation rate in plants.

• Polyploid offspring are not genetically compatible with their parents.

• Polyploidy allows plants to survive in harsh environments.

• Polyploidy reduces the number of chromosomes in offspring.

Multiple Select

Which of the following are true about allopolyploidy?

• It involves two different species.

• It results from hybridisation.

• It always produces infertile offspring.

• Both parents contribute unreduced gametes.

Fill in the Blanks

Polyploid crops typically grow to larger sizes due to

vigour.

Open Ended

Why is the biological species concept difficult to apply to bacteria?

Fill in the Blanks

Dichotomous keys are most commonly used to identify organisms based on

features.

Multiple Choice

Which of the following features is used first to distinguish between Australian mammals in the dichotomous key example?

• Has a tail

• Has wings

• Has a pouch

• Is nocturnal

Multiple Select

Which of the following statements about environmental DNA (eDNA) are correct?

• eDNA is genetic material released by organisms into the environment.

• eDNA can be used to identify species without direct observation.

• eDNA can only be found in water samples.

• eDNA can last for days to weeks in the environment.

Open Ended

Explain how DNA barcoding can be used to monitor habitat biodiversity and why it is advantageous compared to traditional observation methods.

Open Ended

What is one question you still have about the process of speciation or something you would like to learn more about?

Open Ended

How does reproductive isolation contribute to the process of speciation?

Fill in the Blanks

Adaptive radiation occurs when species occupy various

.