Each of the features of our bodies is controlled by a:
During adolescence, boys:
A person of blood group AB has:
When testing a leaf for the presence of starch, the correct sequence of procedures is:
Veins have valves because
Why is testing a leaf for starch a reliable indication that photosynthesis has taken place?
The density of pure water is:
Many leaves are adapted to photosynthesise effectively by having:
Compared to industrialised countries, developing countries:
When we sweat, we lose heat because:
Which one of the following is correct. When we digest our food:
Demersals are fish that are found:
Which one of the following comparisons of inhaled and exhaled air is correct?
Which one of the following best describes hormones?
Breathing in fish involves which two processes?
Some foods contain flavour enhancers. These food additives:
Which of the following statements about anaerobic respiration is true?
When carbon dioxide gas passes through limewater, the limewater:
Three factors that increase the risk of coronary heart disease are:
Hormonal methods of contraception work by:
The workplace should be:
Which one of the following best compares the eye and a camera?
Which of the following nutrients is/are digested in the stomach?
Atherosclerosis is a process in which:
The main parts of the human circulatory system are:
The blood cells that engulf invading microorganisms are:
The wall of the heart is made of:
When focussing on distant objects:
Which one of the following pairs of definitions is correct?
The correct equation for photosynthesis is:
Measuring plant growth by measuring height is convenient, but inaccurate because:
Tooth decay can be caused by:
When something gets hotter, the particles in it gain more:
Excretion is best defined as:
Absolute zero is:
In a simple reflex action:
Some plants reproduce by forming bulbs. The new plants that grow from the bulbs will be genetically identical
Which of the following tests describes the test for glucose?
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