B11 - plant responses RP

Question 1

what is the purpose of the plant responses required practical

Answer 1

gravity, light intensity and direction of light are factors that can affect the growth of newly germinated seedlings

Question 2

what is the independent variable in the plant responses required practical

Answer 2

light direction

Question 3

what is the dependent variable in the plant responses required practical

Answer 3

direction of growth

Question 4

what are the control variables in the plant responses required practical

Answer 4

type of seed, volume of water added, temperature, number of seeds

Question 5

what are the results of the plant responses required practical

Answer 5

you should expect to see shoots grow towards the light due to auxins collecting on the shaded side and causing cells to grow more quickly

Question 6

what is the method of the plant responses required practical

Answer 6

• take a number of small plastic containers and make a hole on one side, all the holes must be the same size
• put some soil in the containers and put in 10 cress seeds
• put a lid on the containers in even lighting with the holes pointing in different directions
• water the soil and leave for several days
• measure length of shoots and record the direction they grow in used labelled scientific drawings