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Edexcel A-Level Biology A2 5.14 Core Practical 11 Habitat Ecology Study Questions

Review Core Practical 11 by planning habitat sampling, measuring abiotic variables and selecting reliable quantitative observation methods from marked exam evidence.

Syllabus
First assessment 2019
Course
Biology YBI11
Level
A2

Exam points

  • measure abiotic variables such as temperature, pH and water content when investigating habitat ecology
  • use preliminary trials to choose reliable species-identification, observation-timing, sampling and weather methods
  • plan quantitative habitat observations by comparing sampled locations and recording distances or fruiting status

Edexcel A-Level Biology A2 5.14 Core Practical 11 Habitat Ecology Study Questions question 1

[Maximum number: 2]

The photograph shows part of a desert in Mexico.

Figure for Question Edexcel A-Level Biology A2 5.14 Core Practical 11 Habitat Ecology Study Questions question 1 — Edexcel A-Level Biology A2

A scientist observed that one species of cactus, Neobuxbaumia tetetzo, was often found near a species of tree, Mimosa luisana.

The scientist decided to test the hypothesis that the cactus plants often grow close to mimosa trees.

One hundred locations were selected at random. A 10×10 m10 \times 10 \mathrm{~m} quadrat was placed at each location.

The presence or absence of each species was recorded in each quadrat.

Abiotic variables in the soil cannot be controlled in this investigation. However, these variables can be measured to confirm that these plants are growing in similar conditions.

State two abiotic variables in the soil that could affect this investigation. First variable Second variable

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