Question

(a) A school investigates variation in one class.

Define the term variation.

(b) A class measures the height of each student.
Table 7.1 shows the results.

(i) Identify the most frequent height range shown in Table 7.1.
……………………………………………………………………………………… cm
(ii) Complete the sentence to describe how Table 7.1 provides evidence that height is an
example of continuous variation.
Choose words from the list.
Each word can be used once, more than once or not at all.
                 genotypes            offspring           phenotypes
               six                  eight               two
The results in Table 7.1 show there are a range of ………………………………… between ………………………………… extremes.
(iii) State one example of discontinuous variation.

(c) Fig. 7.1 is a photograph of a female lion.
The lion has very sharp, pointed teeth suitable for catching and eating other animals.

(i) State the term used to describe an animal that gets its energy from feeding on other animals.

(ii) Circle the correct words shown in bold to complete the sentences to describe how lions may have developed sharp, pointed teeth.
There was a range of different length teeth in the lion population.
The lions with sharp, pointed teeth were better at catching and killing other animals for food.
The lions without sharp, pointed teeth adapted / died / survived.
The lions with sharp, pointed teeth passed on their alleles / cells / sex to their offspring.
This occurred over many days / hours / generations until eventually, all the lions had sharp, pointed teeth.
(iii) State the name used to describe the process in (c)(ii).