Plant Tropisms Quiz

Imagine planting a garden. What is the term used to describe how the plants' roots grow downwards and the shoots grow upwards, guided by the force of gravity?

• Phototropism

• Hydrotropism

• Geotropism

• Thigmotropism

Imagine you're a gardener noticing that some of your plants are growing in odd directions. You recall a hormone that influences the direction of root and shoot growth in plants. What is this hormone called?

• Ethylene

• Cytokinin

• Gibberellin

• Auxin

When a sunflower turns its head to face the sun, what type of tropism is it exhibiting?

• Negative tropism

• Neutral tropism

• Positive tropism

• Static tropism

Imagine a young plant in a window sill. What role does auxin play in the plant's stem bending towards the sunlight?

• It inhibits growth on the side of the stem facing the window.

• It promotes even growth throughout the stem, regardless of light direction.

• It promotes growth on the side of the stem facing away from the window.

• It has no role in the plant's bending towards the light.

When a plant in your garden bends towards the sunlight coming from the window, what type of tropism is it exhibiting?

• Geotropism

• Phototropism

• Hydrotropism

• Aerotropism

When a plant's roots grow towards a source of water, what is this response called?

• Geotropism

• Phototropism

• Hydrotropism

• Aerotropism

Imagine a gardener notices that a row of carrot plants growing on a slope are bending in a peculiar way. What is the reason for the carrot roots bending in such a manner when they grow sideways?

• The roots will bend upwards towards gravity.

• The roots will grow straight without bending.

• The roots will bend downwards towards gravity.

• The roots will stop growing completely.

When planting a tree, what is the term used to describe how the tree's roots grow downwards into the soil, following gravity?

• Negative geotropism

• Positive phototropism

• Negative phototropism

• Positive geotropism

Imagine a sunflower in a garden that leans towards the sunlight. What happens to the cells on the side of the sunflower's stem that is away from the sunlight, as it exhibits positive phototropism?

• Cells decrease in size due to auxins.

• Cells remain the same size.

• Cells elongate due to auxins.

• Cells stop dividing.

During a sunny day in the garden, which part of the plant is least likely to adjust its position or growth direction in response to sunlight?

• Leaves

• Stems

• Roots

• Flowers