A bacterium reproduces by dividing in two. This is an example of

1.   ?    asexual reproduction
2.   ?    fertilisation
3.   ?    mutation
4.   ?    sexual reproduction

Sexual reproduction leads to more variation than asexual reproduction because

1.   ?    genes pair up in new ways during fertilisation
2.   ?    mutations only occurn during sexual reproduction
3.   ?    natural selection takes place
4.   ?    only males have Y chroomosomes

If there is a leak of radioactive materials from a nuclear power station

1.   ?    mutation rates will rise
2.   ?    ricers will have less oxygen
3.   ?    the atmosphere will get warmer
4.   ?    the rain will become more acidic

A disease is caused by the recessive allele c. A man and his wife both have the genotype Cc. What is the chance of their first child having the disease?

1.   ?    Nil
2.   ?    1 in 2
3.   ?    1 in 3
4.   ?    1 in 4

Some types of disease-causing bacteria have become resistant to soem antibiotics. This is the result of

1.   ?    the antibiotics causing mutations in the bacteria
2.   ?    the antibiotics not being strong enough
3.   ?    the bacteria becoming using to the antibiotics
4.   ?    the survival of varieties of bacteria which are not affected by the antibiotic

Penguins use their wings for swimming instead of flying. This is an example of

1.   ?    adaptation
2.   ?    competition
3.   ?    continuous variation
4.   ?    mutation

Which of the following is due to one allele of a gene producing features which favour survival more than the other allele of the gene?

1.   ?    Continuous variation
2.   ?    Discontinuous variation
3.   ?    Mutation
4.   ?    Natural selection

Which energy source is non-renewable?

1.   ?    Coal
2.   ?    Waves
3.   ?    Wood
4.   ?    Wind

A solar panel can be used to heat water. The energy that heats the water comes from

1.   ?    electricity
2.   ?    gas
3.   ?    the Moon
4.   ?    the Sun

Radioactivity can be measured by

1.   ?    an ammeter
2.   ?    a Geiger-Muller tube
3.   ?    a voltmeter
4.   ?    an X-ray tube

Domestic smoke alarms contain radioactive sources that emit alpha particles. They do not present a hazard to humans because

1.   ?    alpha particles do not affect human tissue
2.   ?    alpha particles are electromagnetic waves
3.   ?    alpha particles cannot penetrate the casing of the smoke alarm
4.   ?    alpha particles are not charged

Radon is a gas with a half-life of 55s. The activity of a sample of radon is measured to be 80 counts/s. Atfer 100 seconds the activity is likely to be

1.   ?    0 count/s
2.   ?    10 count/s
3.   ?    20 count/s
4.   ?    40 count/s

A patient is to be injected with a radioactive tracer isotope to show the blood flow through the liver. Which isotope is most suitable?

1.   ?    An alpha emitter with a half-life of 6 hours
2.   ?    A beta emitter with a half-life of 6 days
3.   ?    A gamma emitter with a half-life of 6 hours
4.   ?    A gamma emitter with a half-life of 6 days

What is the name of the white blood cell that 'remembers' the shape of antibody to make?

1.   ?    memory cell
2.   ?    lymphocyte
3.   ?    antigen
4.   ?    antibiotic

Which one of the following is LEAST likely to bring about evolution?

1.   ?    artifical selection
2.   ?    mutation of genes
3.   ?    temporary changes in the environment
4.   ?    naturally occuring radiation

What is meant by genetic mutation? Choose the best answer

1.   ?    changes in the gene
2.   ?    changes in the number of arms or legs
3.   ?    changes in the nucleus
4.   ?    changes in the organism