The stem of a plant contains xylem tubes. Name two substances transported in the xylem.
Important Questions on Respiration and Circulation
Carlos has a celery stalk with leaves. He cuts the bottom off the stalk. Then he puts the stalk in a glass of water mixed with blue food colouring.
The next morning, the celery leaves are blue. Carlos cuts the stalk halfway up and sees small blue circles within the stalk.
Carlos's friend says that if you cut the leaves off a celery stalk, less water will be taken in by the stalk.
Plan an investigation method to find out if this might be true.
The diagram shows the ribcage.
Name an organ protected by the ribcage that pumps blood.
The diagram shows the ribcage.
Name an organ found in the ribcage that is the site of gaseous exchange.
The diagram shows the ribcage.
The diagram shows two blood vessels.
Explain why vessel A has thick elastic walls.
Hussain is growing plants. He waters them every day. Once a week he adds fertiliser to the soil.
Name the specialised cells in the plants that absorb water and minerals.
Name the specialised cells in the plants that transport water and minerals up the stem to the leaves.
