M4 TROPISMS AND HORMONES

The shoot of this plant growing upwards can be attributed to which of the following?

• Positive geotropism

• Negative geotropism

• Negative phototropism

• Hydrotropism

The root of this plant growing downwards can be attributed to which of the following?

• Positive geotropism

• Negative geotropism

• Positive phototropism

• Positive hydrotropism

When planted in the dark how will a young shoot behave?

• It will stop growing

• It will grow straight up

• It will stop producing auxin

• It will grow across the ground

A cut shoot was treated in the following way by an agar block containing auxin. What will be the response?

• Not grow

• Bend to the left

• Bend to right

• Grow straight up

A cut root was treated in the following way by an agar block containing a high concentration of auxin. What will be the response?

• Not grow

• Bend to the left

• Bend to right

• Grow straight up

A capped shoot is exposed to light in the following way, how will it respond?

• Bend to the left

• Bend to the right

• Grow straight up

• Not grow at all

Which of the following options lists plant parts in order of lowest to highest auxin content?

• Unlit side of shoot tip, sunlit side of shoot tip, stem, root

• Sunlit side of shoot tip, unlit side of shoot tip, stem, root

• Root, stem, sunlit side of shoot tip, unlit side of shoot tip

• Root, stem, unlit side of shoot tip, sunlit side of shoot tip

Which of the following plant hormones are associated with plant growth?

• Auxins

• Gibberellins

• Abscisic acid

• Cytokinins

• Ethylene

Which of the following tropisms is depicted in the image?

• Positive thigmotropism

• Negative thigmotropism

• Gravitotropism

• Hydrotroptism

Which plant hormone is a simple hydrocarbon gas?

• auxin

• gibberellin

• ethylene

• cytokinin