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Hedgehogs are mammals. Touching a hedgehog causes it to roll into a ball to protect itself. Which characteristics is it displaying?
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According to the binomial system, how should a human be named?
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The diagram shows an arthropod.
Which group does this arthropod belong to?
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The photomicrograph shows a cell from a type of aquatic plant.
Which parts labelled on the photomicrograph indicate that this is a plant cell?
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592
The diagram shows the female reproductive system. At which level of organisation are the ovum and the ovary? [Table_1]
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The cell shown in the diagram has been magnified 3000 times. The diagram is 21 mm wide.
What is the actual diameter of the cell?
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What are features of osmosis?
[Table_1]
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The diagram shows apparatus which can be used to demonstrate osmosis. After one hour, what would happen to the liquid levels in the glass tubes?
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Which substances are made by linking together glucose molecules only?
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The graph shows the effect of pH on the rate of reaction of an enzyme. What does the graph show?
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The diagram shows a cell with groups of bacteria around its edge.
The bacteria move to areas of high oxygen concentration.
Which process in the cell causes the bacteria to form these groups?
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The diagram shows a section through a leaf.
Which row correctly identifies tissues X and Y?
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541
Which stage of nutrition takes place when food molecules become part of a body cell?
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What is the definition of chemical digestion?
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The diagram shows the human alimentary canal.
Where is most digested food absorbed into the blood?
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In which order does water pass through these structures in a plant?
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The photomicrograph shows a cross-section through a plant stem. What is the name and function of the tissue labelled X?
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The table shows some features of blood vessels. Which row shows the features of a vein?
[Table with features: direction of blood flow, size of the central hole (lumen), thickness of wall]
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Which component of the blood releases antibodies in response to an infection by bacteria?
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Which is an example of a transmissible disease?
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The diagram shows some of the structures in a human lung. Where is the carbon dioxide concentration highest?
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The list shows some processes that happen in the human body.
1. water enters cells by osmosis
2. muscles contract
3. impulses travel along neurones
4. oxygen diffuses into cells
Which of these require energy released by respiration?
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The amount of urea in the blood increases as it passes through organ X.
What is organ X?
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Which is the correct sequence of structures through which a nerve impulse passes in a reflex arc?
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The diagram shows an eye. Which labelled part contains cells that are sensitive to light?
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Which hormone stimulates the development of male gametes?
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A drug is defined as a substance taken into the body that
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What is an example of asexual reproduction?
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What is the sequence of events when a woman gives birth?
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Some types of birth control are listed.
1. condom
2. diaphragm
3. IUD
4. vasectomy
Which types are barrier methods?
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In humans, sex determination is controlled by the X and Y chromosomes.
A man and a woman have three children, two boys and a girl.
What is the probability that their next child will be a girl?
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507
Mitosis is a type of cell division. Which row about mitosis is correct?
[Table_1]
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506
Which statement is best used to describe differences in height in humans?
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A student wrote some statements describing the stages involved during selective breeding of plants.
1. Farmers select individual plants with desirable features.
2. Farmers cross these individuals to produce the next generation.
3. The farmers then select the offspring with the desirable features.
Which statements are correct?
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The diagram shows a food chain.
clover plant $\rightarrow$ rabbit $\rightarrow$ fox
Which terms can be used to describe the fox in this food chain?
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The diagram represents the carbon cycle.
Which process produces the carbon dioxide from the factory and the car?
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In the water cycle, which stage is only carried out by plants?
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Yeast carries out anaerobic respiration, making carbon dioxide and ethanol as end products. Which end products can be used to make biofuel and bread? [Table_1]
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What is the effect of replacing tropical rainforest with plantations of oil palm trees, which are grown as crop plants?
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