Some chemical symbols are listed. What is the equation for photosynthesis?

The diagram shows some of the structures seen in a section through a dicotyledonous leaf. Which two features are missing from this diagram?

The table shows the rates of absorption of two different sugars, arabinose and glucose, in living and dead intestines. The concentrations of the sugars inside the intestines were the same in each case. What are the main methods of absorption of arabinose and glucose in living intestine?

The diagram shows a section of the wall of the small intestine. Into which structure are most of the lipid components of the diet absorbed for transport to the rest of the body?

A plant was placed in water containing black dye. After 24 hours the plant was removed and sections were taken from the root and the stem. Which diagram shows the results?

A gland secretes different types of enzymes into part of the alimentary canal which allows digestion of proteins and starch. It also receives alkaline secretions from another gland and contains muscles that are used in peristalsis. Which part of the alimentary canal is being described?

The diagram shows part of a tree trunk. A ring of bark including the phloem has been removed. The tree will eventually die because removing the bark stops the transport of

The diagrams show an experiment to find the rate of photosynthesis in an aquatic plant in different conditions. Which plant produces the most bubbles per minute?

The following paragraph describes water uptake by roots. Root hair cells have ..1.. cell walls to allow them to absorb water. Cell cytoplasm has a ..2.. water potential than soil water so water moves by ..3.. from the soil to the root hair cell. Which words correctly complete gaps 1, 2 and 3?

The diagram shows the pathway of water molecules through part of a leaf, seen under a microscope, in transverse section. Where does water evaporate?

The diagram shows a section through a plant stem. Which process is responsible for moving substances in region Z?

A student investigates the effect of different colours of light on the rate of photosynthesis. In three separate experiments, he shines red, blue, or green light onto an aquatic plant. The number of oxygen bubbles produced by the plant is counted. Each experiment is carried out three times and the average number of bubbles calculated. What explains the results?

The diagram shows the human alimentary canal. In which part does protein digestion begin?