Question 1

What is homeostasis?

Accepted Answer

Maintenance of a constant internal environment

Answer

Maintenance of a constant external environment

Question 2

What is the function of auxins in flowering plants?

Accepted Answer

Regulating cell elongation and growth patterns

Answer

Transporting nutrients

Answer

Attracting pollinators

Answer

Responding to light changes

Question 3

Which response mechanism allows flowering plants to grow towards a light source?

Accepted Answer

Phototropism

Answer

Hydrotropism

Answer

Geotropism

Answer

Thigmotropism

Question 4

What process allows flowering plants to respond to changes in gravity?

Accepted Answer

Geotropism

Answer

Hydrotropism

Answer

Phototropism

Answer

Thigmotropism

Question 5

What is an effector?

Accepted Answer

Part of the body which brings about a response

Answer

A cell which detects a change in the environment

Answer

A change in the environment

Question 6

What hormone is primarily responsible for the growth response of plants towards light?

Accepted Answer

Auxin

Answer

Abscisic acid

Answer

Cytokinin

Answer

Gibberellin

Question 7

What is the term for the process by which plants respond to the direction of light?

Accepted Answer

Phototropism

Answer

Thigmotropism

Answer

Gravitropism

Answer

Hydrotropism

Question 8

How does auxin lead to the growth of a plant towards light?

Accepted Answer

Auxins move to the shaded part of the plant. Causes cell elongation and cell division. Shaded part grows quickly. Shoot grows towards the light.

Answer

Auxins move to the shaded part of the plant. Prevents cell elongation and cell division. Shaded part grows slowly. Root grows away from the light.

Question 9

How does auxin lead to the growth of a plant towards gravity?

Accepted Answer

If a root is placed horizontally, the bottom side with the auxin will grow less. The rest of the root will grow and so the root will bend downwards.

Answer

In a root, the shaded side contains more auxin and grows less - causing the root to bend away from the light.

Question 10

How does auxin lead to the growth of a root away from light?

Accepted Answer

Auxins move to the shaded part of the plant. Prevents cell elongation and cell division. Shaded part grows slowly. Root grows away from the light.

Answer

Auxins move to the shaded part of the plant. Causes cell elongation and cell division. Shaded part grows quickly. Shoot grows towards the light.

Question 11

What is a stimulus?

Accepted Answer

A change in the environment

Answer

A cell which detects a change in the environment

Answer

Part of the body which brings about a response

Question 12

What is a receptor?

Accepted Answer

A cell which detects a change in the environment

Answer

Part of the body which brings about a response

Answer

A change in the environment

Question 13

What is an effector?

Accepted Answer

Muscle or gland

Answer

Brain

Answer

Spinal cord

Question 14

Auxin

Accepted Answer

prevents growth in roots

Answer

causes growth in roots

Question 15

Auxin

Accepted Answer

causes growth in shoots/stems

Answer

prevents growth in shoots/stems

Question 16

Auxin is produced in the

Accepted Answer

tips of the shoot/root

Answer

sides of the shoot/root

Question 17

Roots are

Accepted Answer

negatively phototropic

Answer

positively phototropic

Question 18

Shoots are

Accepted Answer

positively phototropic

Answer

negatively phototropic

Question 19

Roots are

Accepted Answer

positively geotropic

Answer

negatively geotropic

Question 20

Shoots are

Accepted Answer

negatively geotropic

Answer

positively geotropic

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