Urea is made from surplus proteins in:
Absolute zero is:
Transpiration is:
Which one of the following best compares the eye and a camera?
The blood cells that engulf invading microorganisms are:
We lose water mainly in:
When testing a leaf for the presence of starch, the correct sequence of procedures is:
All gas exchange surfaces in vertebrate animals have:
The correct equation for photosynthesis is:
When something gets hotter, the particles in it gain more:
The main parts of the human circulatory system are:
When we are too hot, more blood flows through the capillaries near the surface of the skin. This helps us to cool down because the blood loses heat by:
During adolescence, boys:
Water passes out of leaves through the:
Breathing in fish involves which two processes?
Each of the features of our bodies is controlled by a:
The particles in a liquid:
Hormonal methods of contraception work by:
Why is testing a leaf for starch a reliable indication that photosynthesis has taken place?
Which of the following can cross the placenta from mother to fetus?
The wall of the heart is made of:
Which of the following statements about anaerobic respiration is true?
Which of the following are all secondary sex characteristics in females?
Many leaves are adapted to photosynthesise effectively by having:
Which one of the following pairs of definitions is correct?
Which of the following tests describes the test for glucose?
Which of the following nutrients is/are digested in the stomach?
Which of the following properties of water is not important to the survival of living things?
The density of seawater is:
Which statement is not true of sperm and ova?
Excretion is best defined as:
Which of the following are all deficiency diseases?
When carbon dioxide gas passes through limewater, the limewater:
In a simple reflex action:
Overfishing means:
Three factors that increase the risk of coronary heart disease are:
Compared to industrialised countries, developing countries:
Photosynthesis is important because:
We do not see an object if rays of light from it are focussed on the blind spot because:
Which one of the following best describes hormones?
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