What is a characteristic of all living organisms?
Which statement about the binomial naming system is correct?
Scientists discover a new species of animal.
It has a segmented body with two pairs of legs on each segment.
To which group of animals does this new species belong?
In which part of a cell does photosynthesis take place?
The diagram shows some of the blood vessels and other structures in the human body
The blood vessels shown are all parts of the same
A photograph shows a plant cell nucleus measuring 2 mm across.
If the magnification of the cell is x500, what is the actual size of the nucleus?
By which process do oxygen and carbon dioxide move between cells and capillaries?
Some students investigated osmosis.
They placed some dried fruit into a beaker of distilled water. The mass of the fruit was measured at regular intervals during a 24-hour period.
Which graph shows the results?
Which element is found in proteins but not carbohydrates?
Starch is digested by amylase in the mouth, but it is not digested in the stomach.
What is the reason for this?
Which type of molecule are enzymes made of?
A plant with striped leaves was kept in bright light for six hours.
A leaf was taken from the plant and the chlorophyll was removed. The leaf was then tested for starch using iodine solution.
Which diagram shows the result of the test?
Which photomicrograph of the leaf section has been correctly labelled?
In humans, where does most of the absorption of digested food take place?
What is the cause of the start of dental decay?
Which statement correctly identifies the enzyme and the products of fat digestion?
The diagram shows one of the stomata of a leaf, and some of the cells that are near it
During transpiration, what describes the movement of water at X and at Y?
A plant shoot is placed in a solution of dye.
The dye moves up the stem.
Under which conditions will the dye move most slowly?
Through which blood vessels does blood flow into the heart?
1 pulmonary artery
2 pulmonary vein
3 vena cava
4 aorta
The diagram shows a cross-section through a human blood vessel.
Which type of blood vessel does the diagram show?
What is a function of some white blood cells?
The diagrams show the depth and rate of breathing in a person at 12:00 and 13:00.
Which statement applies to respiration?
The table shows some products of respiration.
Which row shows the products of anaerobic respiration in muscles?
A student carried out an experiment to investigate the effect of temperature on the volume of urine produced.
Which row shows the experiment where the environmental temperature was increased from 20 °C to 40 °C but no other changes were made?
A student’s eyes blinked as a ball flew past their head. This is a reflex action.
Which row describes the reaction shown by the student?
What type of cell must an organ contain to detect a stimulus?
The diagram shows the position of the kidneys in a human. Each kidney has an endocrine gland above it.
Which glands are shown?
Why are people advised not to drive a car after drinking an excessive quantity of alcohol?
Which statement about the process of asexual reproduction is correct?
Scientists studied the effect on infant birthweight of mothers smoking tobacco. They compared their findings with the birthweights of infants from non-smoking mothers. The results are shown in the bar chart.
Which statement describes what this bar chart shows?
Changes occur in a boy’s body at puberty; his height increases, more muscle develops and body hair grows.
Which hormone stimulates these changes?
By which process is genetic information transmitted from generation to generation?
Some reptiles can lose and regrow their tails to avoid predation.
Which process occurs to regrow the tail?
What is an adaptive feature of an organism?
The diagram shows the energy flow through part of a biological system.
What should be in the box labelled 1?
Human activities are changing the carbon dioxide concentration in the atmosphere.
Which activities will increase the carbon dioxide concentration in the atmosphere?
1 burning fossil fuels
2 burning cut-down trees
3 fossilisation of cut-down trees
4 planting replacement trees
Which description of a population is correct?
What is an example of genetic engineering?
What happens when deforestation takes place?