Data that is collected through taking measurements.

Data that is collected through making observations.

Plant hormones that affect the growth of plants.

A summary of the results of an investigation with data and scientific explanations

The effect of light on the growth of seedlings: practical

Biology

Auxins, phototropism and gravitropism

Pupils will learn about uses of gene technology in medicine, such as for genetic testing, and in agriculture, such as the production of genetically engineered crop plants with desirable characteristics.

Pupils learned about the roles of hormones in human reproduction, including control of the menstrual cycle, and other uses of hormones such as in in contraception.

This unit covers the role of plant hormones like auxins, gibberellins, and ethene in growth and development, including phototropism and gravitropism. It explores their commercial uses and focuses on experiments, data analysis, and presenting scientific explanations.

Plant growth and development

Physical activity and equipment requiring safe use

What is the height of this seedling in mm?

What should you **not** do on a biological drawing?

the seedlings grown in the partial sunlight

After 5 days, which seedlings had increased the most in height?

The seedlings grown in full sunlight were the healthiest.

It is best to grow seedlings in the dark.

The seedlings grown in partial sunlight have smaller leaves.

The seedlings grown in the dark increased the most in height.

Which of the following conclusions can be made from this graph?

What is the plant response to light known as?

the light is coming from the left; auxin has gathered in the left of the shoot

the light is coming from the left; auxin has gathered in the right of the shoot

the light is coming from the right; auxin has gathered in the left of the shoot

the light is coming from the right; auxin has gathered in the right of the shoot

Look at this picture of a shoot. From which direction is the light coming and in which side of the shoot has auxin gathered?

Calculate the mean of these numbers: 40, 50 and 39.

How many millimetres are there in a centimetre?

Which images correctly show phototropism?

Exit Quiz

What is the height of this seedling in mm?