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WorksheetsGrade 8 8D Chapter Review
Total questions: 40
Worksheet time: 24mins
Organisms with _______ cells are considered 'multicellular organisms'
0
1
10
1,000,000,000
The average humans has _______ of cells
thousands(1000s)
millions(1,000,000s)
billions(1,000,000,000)
trillions(1,000,000,000,000)
Which answer correctly shows the relative size of different parts of the body?
organ systems > organs > tissues > cells
tissues > organ systems > organs > cells
Tissues > organs > organ systems > cells
Organ systems > tissues > organs > cells
Which function of life do the lungs help humans perform?
sensitivity
respiration
movement
excretion
Organisms with _______ cells are considered 'unicellular organisms'
0
1
10
1,000,000,000
Which organs do all unicellular organisms have?
Hearts
Skin
None of these
Eyes
What is a problem that must be solved for multicellular organisms but not unicellular organisms?
Transporting substances
Moving
Reproduction
Eating food
Multicellular organisms can be _______ and unicellular organisms can be _______. (microscopic = need a microscope to see)
big or microscopic; microscopic
big; big or microscopic
big or microscopic; big
big or microscopic; big or microscopic
What limits the cell size of unicellular organisms?
The size of their environment
The rate of diffusion into/out of the cell
The size of their food
Their rate of reproduction
Which answers are Kingdoms of life?
Animals
Plants
Insects
Viruses
Organisms are classified into one of the 5 kingdoms based on their:
behaviour
cells
size
organs
Viruses are not considered as 'living things' because..
They are too small to be alive
They only affect animals
They have no proteins
They cannot do the 7 processes of life by themselves
These organisms can have a nucleus, mitochondria, and a cell wall
prokaryotes
protists/
protoctists
fungi
animals
plants
What is the common name for organisms in the Fungi kingdom?
bacteria
mushrooms
cells
seaweed
Yeast, the organism that is used to make bread and wine is an organism in which kingdom?
Animals
Plants
Fungi
Prokaryotes
Protists/
Protoctists
Which kind of respiration can humans perform?
aerobic respiration
anaerobic respiration
cellular respiration
Yeast used in baking respires ______ and yeast used in brewing alcohol respires ________. Select the BEST answer
aerobically; aerobically
aerobically; anaerobically
anaerobically; aerobically
anaerobically; anaerobically
The 'population' of yeast is the....
the X axis value
number of yeast cells
the Y axis value
the time when the number of yeast cells is the greatest
The 'limiting factor' in population growth is...
The factor that is used to determine the initial population number
The factor that makes a population number increase
The factor that stops population number from continuing to increase
The factor that makes the population number decrease
According to the pie chart, the PROPORTION (% of all) of which deaths INCREASED from 1854 to 1855?
"diseases caused by microorganisms"
"wounds"
"other causes"
None
Glucose -> Ethanol + Carbon dioxide
The equation above shows...
Cellular respiration
anaerobic respiration
Aerobic respiration
Ventilation
Possible products of anaerobic respiration include...
Oxygen ( O2 )
Glucose
Lactic acid
Ethanol
Bacteria are prokaryotes, which are different from eukaryotes because...
prokaryotes do not have a nucleus
prokaryotes have skin
prokaryotes are multicellular
prokaryotes can live in oceans
The DNA of bacteria is stored in a....
circular chromosome
nucleus
X-shaped chromosome
flagella
Flagella are used to...
help bacteria move
do cellular respiration
push mucus out of the lungs
create energy
This is a _____________ and it is used to ___________
statement key; identify organisms
organism identifier; give bacteria a name
organism map; identify organisms
statement key; pick the organism you want
What happens during 'binary fission'?
Bacteria transfer their DNA to each other
Bacteria mate and reproduce
Bacteria split into two identical parts
Bacteria do cellular respiration
'pseudopods' are used for...
sensitivity
moving
breathing
digestion
Algue, a common protoctist have...
cytoplasm
chloroplasts
pseudopods
flagella
The producers in most food chains are...
Photosynthesizing organisms
Insects
Bacteria
Humans
Organisms that use sunlight to 'make food' do so using...
mitochondria
food
chloroplasts
stomach
This is the equation for photosynthesis: CO2+H2O −> O2 + Glucose ( C6H12O6 = Glucose) How does photosynthesis compare to aerobic respiration?
The products of aerobic respiration are the reactants of photosynthesis
Aerobic respiration happens in the mitochondria, photosynthesis happens in the chloroplasts
Animals only do aerobic respiration and plants only do photosynthesis
The products and reactants of aerobic respiration and photosynthesis are unrelated
What information can we get from looking at a food chain?
The size of the organisms
The direction of energy transfer
The relative number of organisms
What food each organism eats
What information can we get from looking at a pyramid of numbers?
The size of the organisms
The direction of energy transfer
The relative number of organisms
What food each organism eats
Why are there fewer organisms as the level goes up on the pyramid of numbers?
because each octopus will eat more than one mussel
because algae like to live in big groups
because mussels will also eat each other
because each mussel will use some of the energy it has to stay alive so that the octopus cannot get all of the energy the mussel had
If the population of octopi become poisoned, which organisms will be affected MOST negatively by this?
shark
mussels
algae
What role do 'decomposers' have in an ecosystem?
produce energy by photosynthesis to supply energy to the food chain
help energy transfer from producers to consumers
break down dead organisms and animal wastes in a process called decay
Stop organisms from dying so quickly
The process of 'decay' is useful for ______ in dead organisms and waste be used again by other organisms.
nutrients
oxygen
heat
gases
Which organisms can act as decomposers?
bacteria
fungi
protoctists
animals
What is shown in this image?
the pyramid of numbers
the carbon cycle
the food chain
the energy cycle
