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What are the characteristics of bony fish?
[Table_1]
maintain constant body temperature | external ears present | jelly-covered eggs | scales | |
---|---|---|---|---|
A | ✓ | ✓ | ✗ | ✗ |
B | ✓ | ✗ | ✓ | ✓ |
C | ✗ | ✗ | ✓ | ✗ |
D | ✗ | ✓ | ✗ | ✓ |
What are the features of the leaves of a plant that is a eudicotyledon (dicotyledon)?
[Table_1]
broad leaves | parallel veins | |
---|---|---|
A | ✓ | ✓ |
B | ✓ | ✗ |
C | ✗ | ✓ |
D | ✗ | ✗ |
Many snakes that belong to the viper family are unusual in that they give birth to live young.
This is usually a characteristic of which vertebrate group?
A amphibi ans
B birds
C bony fish
D mammals
Use the key to identify which group is amphibians.
1 hair present ........................ mammals
hair absent ........................ go to 2
2 feathers present .................. group A
feathers absent ..................... go to 3
3 dry scaly skin..................... group B
moist skin ......................... go to 4
4 four limbs ........................ group C
no limbs ........................... group D
The diagram shows a liver cell.
Which features are present in this cell and also in most plant cells?
A) cell membrane and cytoplasm
B) cell membrane and sap vacuole
C) cell wall and cytoplasm
D) cell wall and sap vacuole
Which structure is present in a root hair cell but not in a liver cell?
A. cell wall
B. chloroplast
C. glycogen granule
D. nucleus
Which description of the heart is correct?
A. The heart is an organ, containing several systems, which forms part of the circulatory tissue.
B. The heart is an organ, containing several tissues, which forms part of the circulatory system.
C. The heart is a system, containing several organs, which forms part of the circulatory tissue.
D. The heart is a system, containing several tissues, which forms part of the circulatory organ.
The diagram shows four cells: .
Which two cells contain cellulose and a vacuole?
A 1 and 2
B 1 and 4
C 2 and 3
D 2 and 4
The diagrams show how a cell appears under the microscope at the start of an experiment and after it has been placed in a dilute solution of salts for 5 minutes.
Which statement explains what happens?
A) Dissolved salts enter the cell by diffusion.
B) Dissolved salts leave the cell by diffusion.
C) Water enters the cell by osmosis.
D) Water leaves the cell by osmosis.
The diagram represents the molecules in two solutions either side of a fully permeable membrane.
In which directions are the net movements of the molecules?
[Table_1]
Which group of compounds ensures that metabolic reactions take place effectively?
A carbohydrates
B enzymes
C fatty acids
D hormones
Four different foods were tested for their composition.
The results are shown in the table.
Which food contains protein but not reducing sugar or starch?
[Table_1]
Benedict's test | iodine test | biuret test | |
---|---|---|---|
A | blue | black | purple |
B | blue | brown | purple |
C | brick red | black | blue |
D | brick red | brown | blue |
What are the smaller basic units of starch and glycogen molecules?
[Table_1]
Table 1:
| | starch | glycogen |
|--------|--------------|-------------------------|
| A | amino acids | fatty acids and glycerol|
| B | amino acids | simple sugars |
| C | simple sugars| fatty acids and glycerol|
| D | simple sugars| simple sugars |
A plant with striped leaves similar to the one below was kept in bright light for six hours.
A leaf was taken from the plant and the chlorophyll removed. It was then tested for starch using iodine solution.
Which diagram shows the result of the test?
A — yellow-brown, blue-black
B — white, blue-black
C — blue-black, green
D — yellow-brown, green
Which substances are transported in the phloem?
A. amino acids and starch
B. amino acids and sucrose
C. protein and starch
D. starch and sucrose
The diagrams show some components of the blood of a mammal.
Which component causes the blood to start clotting?
[Image showing components A, B, C, D]
Where are hormones removed from the blood and broken down in the human body?
A. gall bladder
B. kidneys
C. liver
D. stomach
The list shows four metabolic processes.
1 carbon dioxide + water → glucose + oxygen
2 glucose → alcohol + carbon dioxide
3 glucose → lactic acid
4 glucose + oxygen → carbon dioxide + water
Which of these processes occur in muscles?
A 1 and 2 B 2 and 3 C 3 and 4 D 4 and 1
The diagram shows apparatus used to investigate anaerobic respiration in yeast.
What happens to the coloured liquid?
A moves rapidly to the left
B moves slowly to the left
C moves to the right
D stays still
The diagram shows some of the structures in a human lung.
Where is the carbon dioxide concentration highest?
Where is urea produced in the human body and from which chemicals is it produced?
[Table]
| | produced | chemical |
|---|----------|--------------|
| A | intestine | proteins |
| B | kidneys | amino acids |
| C | kidneys | fatty acids |
| D | liver | amino acids |
The table shows the composition of a liquid found in the human body.
[Table_1]
| component | concentration/arbitrary units |
|-----------|----------------------------|
| amino acids | 0.00 |
| glucose | 0.00 |
| proteins | 0.00 |
| salts | 1.50 |
| urea | 2.00 |
In a healthy person, which structure contains this liquid?
The diagram shows muscles and bones in a person's arm.
What happens to the muscles as the weight is lowered?
[Table_1]
biceps | triceps | |
---|---|---|
A | lengthens | lengthens |
B | lengthens | shortens |
C | shortens | lengthens |
D | shortens | shortens |
In an experiment to investigate phototropism, a plant shoot is grown with light coming from one side only.
After two days, in which region has the greatest rate of growth occurred?
[Image_1: Diagram showing start of experiment and after two days with sections labeled A, B, C, and D]
Which structure is involved in the transfer of dissolved nutrients from the mother to the fetus?
A. kidney
B. liver
C. placenta
D. stomach
The diagram shows the human female reproductive system.
After ejaculation, along which route does a male gamete travel to fuse with an egg?
A ovary → oviduct → uterus → cervix
B ovary → uterus → cervix → vagina
C vagina → cervix → uterus → oviduct
D vagina → uterus → cervix → oviduct
Which set of conditions is required for seed germination?
[Table_1]
The graph shows the height of a child, from birth to the age of 10.
What was the approximate height of the child at 7 years of age?
A 106 cm
B 116 cm
C 122 cm
D 130 cm
Which of these cells is haploid?
A. liver cell
B. red blood cell
C. sperm cell
D. zygote
What results from meiosis of a diploid cell?
A. genetically different diploid cells
B. genetically different haploid cells
C. genetically identical diploid cells
D. genetically identical haploid cells
Which pathway is taken by energy from the Sun?
A. chemical energy in carbohydrates → stored in plants → trapped by chlorophyll
B. stored in plants → chemical energy in carbohydrates → trapped by chlorophyll
C. stored in plants → trapped by chlorophyll → chemical energy in carbohydrates
D. trapped by chlorophyll → chemical energy in carbohydrates → stored in plants
The diagram shows a food web including a producer, consumers and a decomposer.
Which organism is the decomposer?
The diagram shows a food chain.
If the hawks are removed from this food chain, what is likely to happen to the numbers of the other organisms in this chain?
[Table_1]
Which organisms remove carbon dioxide from the atmosphere?
A. carnivores
B. decomposers
C. herbivores
D. producers
The diagram shows a simple water cycle.
What is responsible for water loss from the tree?
A. evaporation
B. photosynthesis
C. respiration
D. translocation
Which process is not part of the carbon cycle?
A. combustion
B. photosynthesis
C. respiration
D. transpiration
Which factors affect the rate of growth of a plant population?
[Table_1]
The table shows the effect of different factors on plant population growth, where ✔ indicates the factor affects growth and ✖ indicates it does not.
| | disease | grazing by herbivores | light intensity |
|----------|---------|-----------------------|------------------|
| A | ✔ | ✔ | ✔ |
| B | ✔ | ✔ | ✖ |
| C | ✔ | ✖ | ✔ |
| D | ✖ | ✔ | ✔ |
What is a reason for conserving plant species?
A to absorb oxygen from the air
B to decrease rainfall
C to obtain drugs for medicinal use
D to release carbon dioxide into the air
What is reduced after deforestation?
A. force of rain hitting the ground
B. rainwater run-off
C. soil erosion
D. soil fertility
The diagram shows four positions on a river where water samples were taken. [Image_1: Diagram showing positions W, X, Y, and Z on a river with an untreated sewage outlet].
Which graph shows oxygen concentrations in the river? [Image_2: Four graphs labeled A, B, C, and D showing oxygen concentrations across positions W, X, Y, and Z].