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Plant biology

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Sample exercises

Grades 1–4 · Plant biology

Which structure commonly absorbs water from soil?

  1. Petals only.
  2. Roots.
  3. Seeds only.
Answer and explanation

Roots.

Roots, including root hairs, help absorb water and mineral nutrients.

Grades 1–4 · Plant biology

Which structure commonly supports leaves above the ground?

  1. A stem.
  2. A loose pebble.
  3. A cloud.
Answer and explanation

A stem.

The stem supports and connects plant structures.

Grades 1–4 · Plant biology

Which plant structure is an important photosynthesis site in many plants?

  1. Leaves.
  2. Only the flower's pollen.
  3. Only dry bark.
Answer and explanation

Leaves.

Leaves contain photosynthetic tissues in many plants.

Grades 1–4 · Plant biology

Why should a learner avoid saying that all plants have flowers?

Answer and explanation

Some plants, such as ferns, reproduce without flowers.

A valid nonflowering example is sufficient.

Grades 1–4 · Plant biology

A drawing shows 4 stems, each with 3 leaves. How many leaves are shown?

Answer and explanation

12

4 × 3 = 12 in the stated drawing.

Grades 1–4 · Plant biology

Describe a way to compare two leaves without damaging the plants.

Answer and explanation

Observe or draw their shape, size or edge pattern while leaving them attached.

Accept a careful non-destructive comparison.

Study notes

Germination percentage

Divide germinated seeds by all tested seeds, including those that did not germinate.

Grades 5–9