ESAT (Engineering and Science Admissions Test) · Biology

Variation and evolution

6 practice questions, each with the answer and an explanation.

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Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.

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Which example shows continuous variation?
Which sequence best describes natural selection?
The mean height of a sample is $170 cm$ with a standard deviation of $6 cm$ . Assuming a normal distribution, roughly what range contains $95%$ of the sample?
In a population in Hardy-Weinberg equilibrium, $4%$ of individuals show a recessive condition ( $q^{2} = 0.04$ ). What proportion are heterozygous carriers?
Two populations of a species are separated by a mountain range. Over time they can no longer interbreed. What is this type of speciation called?
A bacterial culture starts with $1.0 \times 1 0^{3}$ cells and grows to $1.6 \times 1 0^{4}$ cells in $2.0$ hours, dividing at a constant rate. What is the generation time?

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