National 5 (Scotland) · National 5 Biology
Multicellular Organisms and Life on Earth
31 practice questions, each with the answer and an explanation.
Practise Multicellular Organisms and Life on Earth now
Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.
All 31 questions
- What is the function of the xylem in a plant?
- Which statement describes translocation?
- Water vapour escapes from a leaf through tiny pores. What are these pores called?
- Which pair of cells controls the opening and closing of a stoma?
- On a hot, windy day a plant loses water faster. Which process has increased?
- Which blood vessel carries blood away from the heart at high pressure?
- Which structure in a vein prevents the backflow of blood?
- Which component of blood carries oxygen?
- What is the function of white blood cells?
- The small intestine is well adapted to absorb food. Which feature increases its surface area?
- What type of food molecules are broken down by the enzyme amylase?
- Which products form when lipase breaks down fats?
- Red-green colour blindness is caused by a recessive allele on the X chromosome. Why does the condition appear more often in males?
- Which row correctly describes the sex chromosomes of a human female and male?
- A cross between a pure-breeding tall pea plant (TT) and a pure-breeding short plant (tt) produces F1 plants. What is the genotype of all of the F1 plants?
- In the F2 generation from crossing two Tt plants (T is dominant for tall), what ratio of tall to short plants is expected?
- A food web has grass → rabbit → fox. Which organism is the primary consumer?
- In an ecosystem, what do decomposers do?
- In a pyramid of biomass the bottom bar is wider than the next. What does this show?
- Why is only about 10% of the energy transferred from one trophic level to the next?
- A student uses a quadrat 1 m² and counts 6, 4, 8, 5 and 7 daisies in five random quadrats. What is the mean number per m²?
- Why should quadrats be placed randomly in a sampling investigation?
- Which piece of equipment is most suitable for sampling ground-dwelling invertebrates?
- Excess fertiliser runs into a loch and algae grow rapidly. What is the process called?
- What is a monoculture?
- A farmer introduces ladybirds to eat aphids on crops. What is this method called?
- Which term describes the variety of different species in an ecosystem?
- What is a mutation?
- Which statement best describes natural selection?
- Bacteria with a mutation that makes them resistant to an antibiotic survive treatment. Which statement explains why the proportion of resistant bacteria increases?
- Two populations of one species are separated by a mountain range for thousands of years and can no longer interbreed. What process has taken place?
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