Cambridge IGCSE Biology - 0610 - Core Paper 1 2014 Summer Zone 2

Growth is a characteristic feature of living organisms.
Which process provides the energy for growth?

The table shows the number of animals collected in a sample from some woodland and the groups to which they belong.

[Table_1]

How many arthropods were collected?

The diagram shows some animal cells, as seen under the microscope.
What will be present at X?

The diagram shows an animal.
Use the key to identify the animal.
1 wings present ....................................... go to 2
wings absent ....................................... go to 3
2 one pair of wings visible .......................... A
two pairs of wings visible .......................... B
3 three pairs of legs ....................................... C
four pairs of legs ....................................... D

The diagram shows a spongy mesophyll cell.
Which structures indicate that this is a plant cell?

The diagram shows a cell.

Which structure is not present?

The diagram shows blood passing through an arteriole into a capillary. Part of the capillary wall has been cut away to show the blood. What is the level of organisation of the structures labelled P and Q?

Which structures contain a cell nucleus?
[Table_1] The table shows the presence or absence of a nucleus in different cell structures:

| | red blood cell | root hair cell | xylem vessel |
|---|----------------|----------------|--------------|
| A | ✓ | ✓ | ✓ |
| B | ✓ | ✗ | ✗ |
| C | ✗ | ✓ | ✗ |
| D | ✗ | ✗ | ✓ |

Key:
✓ = nucleus
✗ = no nucleus

The diagram shows the movement of a concentrated sugar solution up a glass tube. The glass tube is connected firmly to a hollowed-out carrot.
The diagram:
Why does the sugar solution in the glass tube rise?

A plant absorbs water and oxygen into its roots. How are these substances absorbed? [Table_1]

The diagram shows the lock and key model of enzyme action.
Which is the enzyme and which is the substrate?

The table shows the temperature and pH at which four different enzymes are most active.
Which enzyme is a protease from the stomach?

[Table_1]

The data show the concentrations of sugar and starch in an onion. [Table_1]

The onion is tested with Benedict's solution and iodine solution.

Which set of results is correct?

[Table_2]

The small intestines of cows are similar in general structure and function to the small intestines of humans. A disease in cows reduces the number of villi in their small intestines. The cows lose weight and become weak. What explains this?

The diagram shows a palisade cell.
In which region is starch stored?
[Image_1: Diagram of a palisade cell with regions A, B, C, D]

Which heart valves are open and which are closed when blood passes out of the right ventricle towards the lungs?

A decrease in which factor normally causes transpiration rate to increase?

What is the path of water through a plant?

What contains the greatest concentration of lactic acid?

Which two statements describe the effects of smoking cigarettes?
1 Cilia beat more quickly.
2 Cilia beat more slowly.
3 Goblet cells stop producing mucus.
4 Goblet cells produce more mucus.

A sample of expired air is collected in a gas jar. Another gas jar contains normal atmospheric air.
A lighted candle is placed inside each gas jar as shown. The time taken for each flame to go out is
measured. As the candles burn they use up the oxygen available in the jar.

The table shows the results of this experiment.
[Table_1]
What is an explanation of the difference between the results in jars X and Y?

The diagram shows the human urinary system.

What is the part labelled X?

Which responses occur when a person is too hot?
[Table_1]

The diagram shows the shoot of a seedling, fixed to a rotating platform that is being lit from one side only.
The platform was allowed to rotate for two days, then it was left stationary for a further two days.
Which diagram shows the appearance of the seedling after this four-day period?

How will the composition of a pregnant woman's blood change as it passes through the placenta?
[Table_1]

The diagram shows the female reproductive system.
At which labelled points are sperms and ova released?
[Table_1]

In arthropods, growth occurs only after the exoskeleton is shed and before the new one hardens.
Which graph shows a typical growth curve for an arthropod?

The graph shows changes in dry mass as a seed germinates and becomes a seedling. At which point is it respiring and photosynthesising at the same rate? [Graph depicting changes in dry mass over time with points A, B, C, and D marked]

Which statement is true of both chromosomes and genes?

Genetics is the study of

What is \textit{unlikely} to be affected by the environment?

The diagram shows what happens to the energy that enters the atmosphere from the Sun.
How much of the Sun’s energy is not used for photosynthesis?

The surface waters of the ocean contain a population of microscopic plants.
Which factor would result in \textit{fewer} of these plants?

The diagram shows the water cycle.
Which letter represents transpiration?

The diagram shows part of the carbon cycle.
Which labelled arrow represents photosynthesis?

What are products of respiration in green plants?

The diagram shows a food chain.

If the carnivores in trophic level 3 suddenly die out as a result of disease, in which trophic levels will the number of organisms be likely to decrease?

What is reduced when untreated sewage is released into rivers?

The diagram shows a food chain.
A farmer sprays his cabbages with pesticide.
Which organisms does the farmer want to kill?

What is an effect of pollution by nuclear fall-out?