Plant and animal responses

Question 1

Define abiotic

Answer 1

Non-living components of the environment

Question 2

Define biotic

Answer 2

Living components of the environment

Question 3

What is tropism?

Answer 3

A growth of a part of a plant in response to a directional stimulus

Question 4

What is the term for when tropisms are towards a stimulus?

Answer 4

Positive stimulus

Question 5

What is the term for when tropisms are away from the stimulus?

Answer 5

Negative tropisms

Question 6

What is phototropism in response to and what type of stimulus is it?

Answer 6

Light and abiotic

Question 7

What is geotropism in response to and what type of stimulus is it?

Answer 7

Gravity and abiotic

Question 8

What is hydrotropism in response to and what type of stimulus is it?

Answer 8

Moisture and abiotic

Question 9

What is thigmotropism in response to and what type of stimulus is it?

Answer 9

Touch and abiotic or biotic

Question 10

What is chemotropism in response to and what type of stimulus is it?

Answer 10

Chemicals and abiotic/biotic

Question 11

Advantages of phototropism

Answer 11

• Ensures plant gets access to as much light as possible, maximising photosynthesis

Question 12

Advantages of geotropsim

Answer 12

• Ensures shoots and roots from germinating seeds grow in the right direction, regardless of the orientation of the seed

Question 13

What do shoots and roots show in geotropism?

Answer 13

Shoots show negative geotropism and roots show positive geotropism

Question 14

Advantages of hydrotropism

Answer 14

• Root tips normally grow towards damper areas of soil, increasing their access to water

Question 15

Advantages of thigmotropism

Answer 15

• Allows plants to detect abiotic or biotic support and curl around

Question 16

Advantages of chemotropism

Answer 16

• Some plants show a tropic response to certain chemicals