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Plants and Sustainability Revision

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Plants and Sustainability Revision

Use the information and data on this worksheet to revise plant biology, investigate evidence and suggest ways to care for plant ecosystems. Write in complete sentences where needed.

How plants work

1.A plant uses light energy to make glucose. Which plant cell structure captures most of the light needed for photosynthesis?

Chloroplast
Root hair
Flower petal
Seed coat

2.Complete the photosynthesis word equation: carbon dioxide + water + → glucose + .

3.During a dry summer, a plant loses less water because it has a waxy leaf surface and stomata that can close. Explain how each feature helps conserve water.

4.A seedling has roots, a stem and leaves. Describe how water travels from the soil to the leaves, and name one job of the stem.

Plants, people and ecosystems

A community is planning work near a patch of native forest. Consider both the evidence and the needs of the ecosystem.

5.When forest is cleared, fewer trees remain to take in carbon dioxide through photosynthesis. Explain one way this can affect the carbon cycle and contribute to climate change.

6.A survey found 45 native plant species in a forest before nearby development and 12 afterwards. Calculate the percentage decrease in the number of species. Show your working.

7.Which two actions are most likely to help protect native plant ecosystems over time?

Replant locally appropriate native species and protect remaining habitat
Remove all fallen leaves and woody material from the forest floor
Plant one fast-growing introduced species everywhere
Use pesticides regularly whether or not pests are present

Investigate and decide

Light intensity (lux)

Bubbles per minute

8.Use the results table to describe how light intensity relates to the number of bubbles. What does the result at 20 lux suggest?

9.Plan a fair investigation to test whether light intensity affects the growth of seedlings. State a testable prediction, what you will change, what you will measure, and two things you will keep the same.

10.A council has a limited budget to support native plants. Compare protecting an existing forest patch with planting native seedlings on cleared land. Give one benefit of each and recommend how the council could use both approaches.