Question 70 – Analysis - OCR A A Level Biology Questions

Biologists studied the shell diameters of two species of land snails living in different microhabitats: Cepaea hortensis and Cepaea nemoralis. Shell diameter is a highly heritable phenotypic trait linked to thermoregulation and hydration.

Some of the results are shown in the chart below.

The recorded shell diameters represented by each bar in the dataset are:

Cepaea hortensis (patterned bars): $mm11.7\text{ mm}$ , $mm12.8\text{ mm}$ , $mm14.1\text{ mm}$ , $mm15.2\text{ mm}$ , $mm16.3\text{ mm}$ , and $mm17.5\text{ mm}$ .
Cepaea nemoralis (solid bars): $mm15.5\text{ mm}$ , $mm17.1\text{ mm}$ , $mm18.3\text{ mm}$ , $mm19.7\text{ mm}$ , $mm21.1\text{ mm}$ , $mm22.4\text{ mm}$ , and $mm24.0\text{ mm}$ .

A scientific bar chart showing the frequency distribution of shell diameters for two land snail species: Cepaea hortensis (patterned bars) and Cepaea nemoralis (solid bars).

Some of the results are shown in the chart below.

The recorded shell diameters represented by each bar in the dataset are:

Cepaea hortensis (patterned bars): $mm11.7\text{ mm}$ , $mm12.8\text{ mm}$ , $mm14.1\text{ mm}$ , $mm15.2\text{ mm}$ , $mm16.3\text{ mm}$ , and $mm17.5\text{ mm}$ .
Cepaea nemoralis (solid bars): $mm15.5\text{ mm}$ , $mm17.1\text{ mm}$ , $mm18.3\text{ mm}$ , $mm19.7\text{ mm}$ , $mm21.1\text{ mm}$ , $mm22.4\text{ mm}$ , and $mm24.0\text{ mm}$ .

A scientific bar chart showing the frequency distribution of shell diameters for two land snail species: Cepaea hortensis (patterned bars) and Cepaea nemoralis (solid bars).

Analysis

Question 48

Analysis

Question 48

Analysis

Question 48

Analysis Questions

Analysis

Question 48

Analysis Questions