Take this Exam: A-Level Biology: Inheritance, Populations and Evolution | Zestly

Question 1

Which of the following are examples of pre-zygotic reproductive isolation mechanisms that can lead to sympatric speciation? Select all that apply.

Accepted Answer

Temporal isolation, where species breed at different times of the year.

Question 2

In the ABO blood group system, which genotypes result in the AB phenotype?

Accepted Answer

I$^A$I$^B$

Question 3

Which of the following statements correctly distinguish between allopatric and sympatric speciation? Select all that apply.

Accepted Answer

Allopatric speciation requires a geographical barrier to gene flow.

Question 4

A chi-squared test is performed to compare observed and expected offspring ratios. If the calculated chi-squared value is greater than the critical value at the 0.05 probability level, what does this indicate?

Answer

The difference is due to chance.

Answer

The difference is statistically significant and the null hypothesis should be rejected.

Answer

The observed data perfectly matches the expected data.

Answer

The sample size was too small to be valid.

Question 5

Which type of natural selection favors individuals at both extremes of a phenotypic range, potentially leading to speciation?

Answer

Stabilising selection

Answer

Directional selection

Answer

Disruptive selection

Answer

Artificial selection