AQA GCSE Biology Plant Responses

Question 1

Why are cress seeds used?

Answer 1

They germinate quickly, making it easy to observe and measure plant growth and responses to different conditions.

Question 2

Why are the petri dishes lined with moist filter paper?

Answer 2

Provides water for germination and creates a moist environment that promotes seed growth.

Question 3

What is the independent variable?

Answer 3

Petri dishes

Question 4

What is the dependent variable?

Answer 4

Plant height

Question 5

State two control variables

Answer 5

. Temperature
. Light intensity

Question 6

State two hazards and precautions

Answer 6

. Chemical exposure from fertilizers- Wear gloves, goggles and lab coat
. Bright light- Avoid staring directly into the light

Question 7

State two ways you can improve this investigation

Answer 7

. Increase sample size
. Repeat experiment multiple times

Question 8

What is the purpose of this investigation?

Answer 8

To investigate how plants respond to various environmental factors EG Light