Curriculum
Course: HIA International — Grade 8
time left:
:
:
Login

Curriculum

HIA International — Grade 8

Unit 1: Photosynthesis and the carbon cycle

0/22

Unit 2: Properties of materials

0/50

Unit 3: Forces and energy

0/50

Unit 4: Maintaining life

0/34

Unit 5: Reactivity

0/41

Unit 6: Sound and space

0/40

Unit 7: Genes and inheritance

0/30

Unit 8: Rates of reaction

0/34

Unit 9: Electricity

0/36
Quiz

GRADE 8 – Unit 7: Genes and inheritance – Unit review (50 questions)

Submit quiz
Once you submit, you will no longer be able to change your answers. Are you sure you want to submit the quiz?
Cancel Submit
  • Questions count: 50
  • Passing grade: B+
  • Time limit:
Start Quiz
1.
Which statement correctly describes microorganism?
single-celled microorganisms
organisms including yeasts and moulds
a nutrient surface used to grow microorganisms
an organism too small to see clearly without magnification
2.
Which statement correctly describes producer?
an organism that obtains energy by eating other organisms
an organism eaten by a predator
an organism that makes its own food
an organism that hunts another
3.
Which statement correctly describes decomposer?
substances needed for growth
returning materials for reuse
interconnected food chains
an organism that breaks down dead material
4.
Which statement correctly describes decay?
an organism that breaks down dead material
a factor that can change
breakdown of organic matter
a type of fungus
5.
How many chromosomes are in a human body cell?
2
23
20 000
46
6.
How many chromosomes are in a human sperm cell?
46
92
1
23
7.
Which is an example of discontinuous variation?
Body mass
Hand span
Height
Blood group
8.
What must exist in a population before natural selection can act?
A new species
Identical individuals
Variation between individuals
Unlimited food
9.
What is a gene?
The nucleus of a cell
A length of DNA that codes for a characteristic
A whole chromosome
A type of cell
10.
What is formed at fertilisation?
A zygote
A chromosome
A gamete
An allele
11.
What graph is used for continuous variation?
A list of names
A histogram
A bar chart with gaps
A pie chart only
12.
Why did dark peppered moths become common in industrial cities?
The moths turned black from soot
The trees died
Soot darkened the bark, so dark moths were better camouflaged
Light moths flew away
13.
Which statement correctly describes bacteria?
an organism too small to see clearly without magnification
organisms including yeasts and moulds
a nutrient surface used to grow microorganisms
single-celled microorganisms
14.
Which statement correctly describes consumer?
an organism that makes its own food
an organism eaten by a predator
an organism that obtains energy by eating other organisms
an organism that hunts another
15.
Which statement correctly describes nutrients?
an organism that breaks down dead material
returning materials for reuse
interconnected food chains
substances needed for growth
16.
Which statement correctly describes decomposer?
breakdown of organic matter
a type of fungus
a factor that can change
an organism that breaks down dead material
17.
What shape is a DNA molecule?
A sphere
A double helix
A single straight line
A flat sheet
18.
Why do offspring differ from their parents?
They have more chromosomes
They grow in a different place
Their genes are all new
They receive a mixture of alleles from both parents
19.
Which factor causes environmental variation?
Alleles from parents
Chromosome number
The number of genes
Diet and surroundings
20.
Why does antibiotic resistance spread?
Resistance is taught
Antibiotics create resistance in every cell
Resistant bacteria survive and reproduce
Bacteria decide to resist
21.
What is DNA?
The molecule that carries the genetic instructions for an organism
A type of protein in muscles
A cell wall material
A type of sugar
22.
What is a gamete?
A sex cell: sperm in males, egg in females
A type of chromosome
A fertilised egg
A body cell
23.
What is variation?
The differences between individuals of the same species
A type of cell division
The differences between two species only
The number of chromosomes
24.
What is natural selection?
The choosing of pets by people
The process by which individuals better suited to their environment survive and breed
The death of all members of a species
A change in one individual during its life
25.
Which statement correctly describes fungi?
an organism too small to see clearly without magnification
a nutrient surface used to grow microorganisms
organisms including yeasts and moulds
single-celled microorganisms
26.
Which term is described as: a microorganism that causes disease?
pathogen
aseptic technique
binary fission
antiseptic
27.
Which term is described as: a feeding level in a food chain?
trophic level
pyramid of numbers
secondary consumer
bioaccumulation
28.
Which term is described as: a microorganism that breaks down dead material and releases nutrients?
decomposer
nitrogen cycle
carbon cycle
biodegradable
29.
Which term is described as: the anaerobic breakdown of sugar by yeast, producing carbon dioxide and ethanol?
fermentation
ethanol
anaerobic
optimum conditions
30.
Which term is described as: an organism too small to see clearly without magnification?
bacteria
agar jelly
microorganism
fungi
31.
Which term is described as: an organism that makes its own food?
consumer
predator
prey
producer
32.
Which term is described as: an organism that breaks down dead material?
nutrients
recycling
food web
decomposer
33.
Which term is described as: breakdown of organic matter?
decomposer
variable
decay
mould
34.
Match the term to its correct meaning: pathogen
a microorganism that causes disease
keeping a culture at a controlled temperature so it can grow
a cell with a cell wall, membrane and cytoplasm but no true nucleus
a chemical used on surfaces to kill microorganisms
35.
Which term is described as: single-celled microorganisms?
microorganism
fungi
agar jelly
bacteria
36.
Match the term to its correct meaning: trophic level
a feeding level in a food chain
the total mass of living material at a trophic level
the herbivore that eats the producer
the way organisms in an ecosystem rely on one another
37.
Which term is described as: an organism that obtains energy by eating other organisms?
producer
predator
prey
consumer
38.
Which term is described as: substances needed for growth?
decomposer
food web
nutrients
recycling
39.
Match the term to its correct meaning: decomposer
a microorganism that breaks down dead material and releases nutrients
the substance decomposers release to break down large molecules outside their cells
digestion that happens outside the cell before the products are absorbed
the continuous movement of carbon between the air, living things and the ground
40.
Which term is described as: an organism that breaks down dead material?
decay
mould
variable
decomposer
41.
Match the term to its correct meaning: fermentation
the anaerobic breakdown of sugar by yeast, producing carbon dioxide and ethanol
the industrial use of yeast fermentation to make alcoholic drinks
the use of living organisms to make useful products
happening without oxygen
42.
Which term is described as: a cell with a cell wall, membrane and cytoplasm but no true nucleus?
bacterial cell
incubation
colony
antiseptic
43.
A microorganism that causes disease is a _____.
producer
consumer
decomposer
pathogen
44.
A feeding level in a food chain is a _____ level.
primary
biotic
tropical
trophic
45.
Decomposers release _____ to break material down outside their cells.
vitamins
minerals
hormones
enzymes
46.
Fermentation by yeast happens without _____.
water
warmth
sugar
oxygen
47.
A pathogen is a microorganism that causes disease. - True or false?
True
False
48.
A trophic level is a feeding level in a food chain. - True or false?
True
False
49.
Decomposers release enzymes to break down material outside their cells. - True or false?
True
False
50.
Fermentation by yeast is anaerobic, happening without oxygen. - True or false?
True
False
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
Part of Unit 7: Genes and inheritance — see every lesson and quiz in this unit.
Accepted payment methods