A scientist studying the blue-ringed octopus made the following observations. It inhabits shallow coral reefs where water temperatures are between 26 °C and 29 °C. It feeds on crabs, shrimp…
Six test tubes were set up. Two different solutions were added to each test tube as shown in the table.The temperature, pH and all concentrations were optimal.Which three mixtures would…
A pea plant is heterozygous for seed colour and homozygous for seed shape. Yellow seed colour (Y) is dominant to green seed colour (y). Round seed shape (R) is dominant…
The diagram shows a simple piece of apparatus that can be used to demonstrate some of the events involved in human ventilation. Which events occurring during ventilation will be demonstrated…
The diagram shows an external view of the human heart. Which of the following statements about the artery shown on the diagram is/are correct?1 It is the site of diffusion…
Which of the following statements could describe the result of a single mutation of a gene coding for a protease enzyme in a fertilised human egg cell?1 A new allele…
The diagram shows part of the carbon cycle. Which row shows the numbered processes that use digestive or respiratory enzymes? Answer: 17) H In order to convert carbon in plants…
Which of the following statements about lipid digestion in the small intestine is / are correct?1 Emulsification by bile makes smaller lipid droplets, each with a smaller surface area.2 Bile…
Since Dolly the sheep, many other mammals have also been cloned by somatic cell nuclear transfer. The genetic material from a body cell is inserted into an egg cell that…
Consumption of alcohol leads to an increase in dilute urine production by reducing the level of the hormone ADH.Which of the following are correct statements about alcohol and/or ADH?1 ADH…