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To which group do both the organisms shown in the diagram belong?
leaf-like fronds which have structures containing spores on their lower surface
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The diagram shows a section of DNA from a chimpanzee.
Which diagram shows a section of DNA from the organism that is most closely related to the chimpanzee?
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What is a leaf?
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The diagram shows a magnified image of a human liver cell with a mitochondrion labelled. The actual size of the liver cell is 20\(\mu \text{m}\).
The image size of the liver cell is 40mm and the image size of the mitochondrion is 4mm.
What is the actual size of the mitochondrion shown in the diagram?
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562
What would increase the rate of diffusion of oxygen into an animal cell?
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A red blood cell and a palisade mesophyll cell are placed in a solution which has a higher water potential than the cells. What will happen to each cell? [Table_1]
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Where in the alimentary canal is the enzyme trypsin found and what are the products of the reaction it catalyses?
[Table_1]
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598
The diagram shows a cell before and during mitosis. At which stage are the chromosomes copied?
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Four test-tubes were set up as shown in the table.
In which test-tube would starch be broken down the fastest?
[Table_1]
504
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The average number of chloroplasts in four different types of cell taken from a plant is shown.
Which is a root hair cell?
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What must be increased in the diet of a person suffering from constipation?
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Which stage of nutrition takes place when food molecules become part of a body cell?
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The diagram shows the human alimentary canal, with a string marked in metres beside it. How long is the small intestine?
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What is a description of transpiration?
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What happens as the blood flows from the atria into the ventricles of the heart? [Table_1]
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The diagram shows a cross-section through a human blood vessel.
Which type of blood vessel does the diagram show?
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Which is a mechanical barrier to pathogens?
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The table shows some of the changes that occur during breathing.
[Table_1]
Which changes occur to cause inspiration?
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In an experiment to investigate anaerobic respiration, two bottles are set up in a warm room, as shown.
What would happen to each balloon after one day?
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Vigorous exercise can cause an oxygen debt.
Which process removes the oxygen debt?
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What is the most important function of sweating?
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Which row shows the function of rod cells?
[Table_1: Rod cells functions table with two columns: 'have greater sensitivity to light' and 'give colour vision']
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The diagram shows a person sweating in hot weather.
What part is played by sweat glands during the process of sweating?
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The diagram shows a synapse in a reflex arc.
What are the identities of the two neurones and in which direction does the neurotransmitter pass?
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The graph shows the number of deaths from MRSA infection per 100,000 people in a population of over-65-year-olds from 2005 to 2012.
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513
After fertilisation, how many chromosomes are in the zygote?
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Which environmental factor is not always a requirement for seed germination?
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In some plants, H is the dominant allele for hairy stems and h is the recessive allele for smooth stems.
A pair of these plants produce 37 offspring, 18 with hairy stems and 19 with smooth stems.
What are the most likely genotypes of the parents?
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The family tree shows the inheritance of the ability to smell flowers called freesias. The allele for the ability to smell freesias is dominant.
Which individual's symbol is not correct?
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The diagram shows a cell from an organism at the end of meiosis.
What is the diploid number for cells from this organism?
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When growing millet, farmers choose seeds from high-yielding plants. Which biological practice is this an example of?
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Which graph shows the growth of a population where there are no limiting factors?
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What is defined as 'all of the populations of different species in an ecosystem'?
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Which pyramid of numbers has more herbivores than producers?
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Why are bacteria useful in biotechnology and genetic engineering?
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Ligase enzymes are used in genetic engineering to
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The action of which type of bacteria would cause soil to be lacking in nitrates?
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What is used to help sustain fish stocks?
[Table_1]
536
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509
