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Students find a small organism in a pond. They catch it and put it into a large jar of water. They see that the organism swims away from light. It lays some eggs before they put it back into the pond.
Which characteristics of living things did the students see in this organism?
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The diagram shows how _Homo sapiens_ (modern people) could have evolved from earlier ancestors.
[Image_1: Diagram of Homo evolution]
Which statement about modern people and their ancestors is correct?
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Use the key to identify the organism.
1 The mouth is at the front of the head. ............................. go to 2
The mouth is between the eye and the fins. .............................
2 The long fin on the back has pale spots. ............................. go to 3
There are no spots on the long fin. .............................
3 The tail fin is longer than the body. .............................
The tail fin is shorter than the body. .............................
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Which features are possessed by all plant cells?
[Table_1]
key: ✓ = present, ✗ = absent
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Which level of organisation is shown by the oesophagus, pancreas, stomach and liver?
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The diagram shows a test-tube containing clear jelly. A drop of blue ink is injected into the middle of the jelly.
The blue colour of the ink spreads throughout the jelly.
By which process does the blue ink spread through the jelly?
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Which row describes active transport?
[Table_1]
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Which reagent is used when testing a food for vitamin C?
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Small molecules are used as the basic units in the synthesis of large food molecules.
Which statement is correct?
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Which graph shows the effect of pH on enzyme activity?
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The diagram shows an experiment to investigate the balance between respiration and photosynthesis. In which tube are photosynthesis and respiration taking place at the same time?
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The diagrams show the structure of four different cells from a plant. Which cell is from the upper epidermis of a leaf?
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The diagram shows the human alimentary canal.
Which pair of structures both produce digestive enzymes?
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The diagram shows a human tooth with an area of decay.
What is likely to have caused the decay?
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A celery stalk was placed into a beaker of blue dye.
When the dye reached the leaves, the stalk was taken out and a section was cut, as shown in the diagram.
Which diagram shows the appearance of the cut end of the stalk?
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The table shows the rate of water flow through a tree over a 12 hour period.
What conclusion can be drawn from the table?
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What is the correct order of blood flow through the blood vessels entering and leaving the heart?
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The diagram shows cross-sections through three types of blood vessel, not drawn to the same scale.
Which section is from a vein and which is from a capillary?
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By which route would an HIV infection not be transmissible?
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What is the approximate percentage of oxygen in expired air?
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Which process uses energy released by respiration?
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The diagram shows two experiments investigating gas exchange in small aerobic crustaceans. Soda lime absorbs carbon dioxide.
Which way does the liquid marker move?
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Yeast is placed inside a container full of a glucose solution with no air.
Which word equation summarises the process that takes place inside the container?
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Which list describes the correct sequence of a simple reflex arc?
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What are the effects on the body when adrenaline is released? [Table_1]
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Which effects does excessive alcohol consumption have on the body? [Table_1]
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Female greenfly can multiply by producing eggs by mitosis. These eggs are not fertilised, but they develop into a new generation of female greenfly. What is this type of reproduction?
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What is \textit{not} essential for germination?
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Which is the main hormone responsible for the development of male secondary sexual characteristics?
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In fruit flies, the allele for grey body, G, is dominant over the allele for black body, g. The result of a mating between two flies is shown.
What were the genotypes of the parents?
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Wheat is a crop plant. Since the 1960s the average yield of wheat has doubled. A reason for this is that modern wheat varieties have shorter, stronger stems and more seeds per stem. What has caused these changes?
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Letters H, J, K and L show the organisms that make up a simple food web.
What must organism H be?
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The diagram shows part of the water cycle.
Which process in living plants is responsible for returning water vapour to the air at P?
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Bacteria are useful for manufacturing products for human use.
Which statement explains why they are useful?
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Which of the processes involved in genetic engineering uses a human gene?
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What is an undesirable effect of deforestation?
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