Cambridge IGCSE Biology - 0610 - Core Paper 1 2013 Winter Zone 2

The diagram shows an arthropod.

How many pairs of jointed legs does this arthropod have?

Which group does not contain animals that are arthropods?

Keys are used in biological identification. Which statement may appear in a key and alone could identify one of the plants in the diagrams?

Which process provides the raw materials needed for tissue repair?

Which series of terms is listed in order of increasing level of organisation?

Which is a tissue and which is an organ? [Table_1]

The diagram shows a cell seen under the light microscope.

Which labels are correct?

The diagrams show a leaf cell before and after staining with iodine solution.



Which substance causes the iodine solution to change colour?

The diagram shows six cells: P, Q, R, S, T, U.
Which are plant cells and which are animal cells?

Which diagram shows the appearance of a plant cell several minutes after it has been placed in a concentrated solution of sugar?

The diagrams show an experiment when set up and the same experiment two hours later.

What explains the movement of water and dye?

The diagram shows two food molecules before and after they have been digested by enzymes.
What identifies the products of fat digestion?

Which statement is correct for all catalysts?

Two enzyme-controlled reactions are shown.

From these reactions, what deduction can be made about enzymes?

The graphs show the quantities of selected vitamins and mineral ions in four foods. Which food is the richest source of the vitamin or mineral ions essential for the transport of oxygen by the blood?

Four foods were tested for each of the following nutrients:
fat (using ethanol);
protein (using the biuret test);
reducing sugar (using Benedict’s solution).

Which food contains protein and fat?

[Table_1]

The diagram shows the circulatory system of a mammal. What describes the blood in vessels X and Y?

The diagram shows a section through an alveolus and a capillary.
Why does carbon dioxide move from X to Y?

The table shows the approximate composition of air breathed out by a mammal.

[Table_1]

Where did the nitrogen in the air breathed out come from?

In which order does water pass through these tissues in a plant?

The diagram shows two shoots at the start of an experiment on transpiration.
What are the likely readings on the spring balances after three days?

The diagram shows some structures in the human neck and thorax.
The lining of tube Q has cilia.
What is an important function of the cilia?

The diagram shows some blood vessels near the surface of the skin. [Diagram here] If vasoconstriction occurs at X, what happens to the blood flow at Y and Z?

How does sweating cool the body?

The diagram shows seedlings in two experiments on the tropic response of seedlings to gravity and light.
Experiment 1: to show the effect of gravity. Start of experiment in the dark, and after 3 days, the shoot has grown upwards.
Experiment 2: to show the effect of light. Start of experiment with light from one side, and after 3 days, the shoot has grown towards the light.
How have the seedlings responded?

A person has a high-protein diet.
What describes the level of urea in the blood leaving the liver and in the urine leaving the kidneys? [Table_1]

A mango tree can reproduce by seed and by asexual reproduction.
Trees produced by each of these methods produce mango fruits.
When comparing these fruits genetically, what is the correct result?

[Table_1]
fruits of trees grown from seeds | fruits of trees produced by asexual reproduction
A identical | identical
B identical | non-identical
C non-identical | identical
D non-identical | non-identical

The diagram shows a section through a flower. After the flower is fertilised, which parts will develop into the fruit and the seed?

Which environmental factor is not always a requirement for seed germination?

The graph is a record of the growth of a plant.

Which labels should be used for the x-axis and the y-axis?
[Table_1]

Most birds have a coloured pigment in their feathers, but in a few individuals, pigment is absent and the birds are albinos.
Albinism occurs when a bird is homozygous recessive for the gene which creates the coloured pigment.
If two albino birds mated, what describes the appearance of their offspring?

In an animal, the allele for straight fur is dominant to the allele for curly fur.
A pair of these animals mate and have nine offspring with straight fur and three with curly fur.
F represents the allele for straight fur and f represents the allele for curly fur.
What are the most likely genotypes of the parents?

What defines a diploid nucleus?

The diagram shows a food web. What type of organism is X?

A food chain shows how organisms depend on each other for their sources of energy, but all energy comes ultimately from one source.
What is this energy source?

The diagram shows the carbon cycle. Which three letters represent respiration?

In which natural cycles do photosynthesis and respiration both play a part? [Table_1]

The chart shows which species of different animals are present in rivers of different pH.



Which conclusion can be drawn from this information?

The graph shows the quantities of pesticides that accumulate in four populations, each at different trophic levels in a food chain. Which population is most likely to be herbivores?

What is the correct sequence for the stages in a sigmoid population growth curve?