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WorksheetsBio 20 Review 2021
Total questions: 50
Worksheet time: 25mins
Which of the following seems to be the biggest reason for the increase in carbon dioxide in the atmosphere?
Decomposition of waste
The albedo of clouds
The burning of fossil fuels
Cellular respiration by the increase of the human population
The process by which organisms return carbon dioxide to the atmosphere is known as
denitrification
photosynthesis
eutrophication
respiration
Which process(es) would add oxygen to the atmosphere?
1
2 and 4
2
1, 3, 4
Which process(es) would add carbon dioxide to the atmosphere?
1
2 and 4
2
1, 3, 4
Which process(es) would add nutrients to the soil?
1 and 4
2 and 4
2
1, 3, 4
Which of the following compounds are the reactants for photosynthesis?
Oxygen and carbon dioxide
Oxygen and water
Carbohydrates and oxygen
Carbon dioxide and water
Which of the following elements is not found in a biotic component of the ecosystem?
Carbon dioxide
Oxygen
Nitrogen
Carbon
Which of the following gases is not a greenhouse gas?
Carbon dioxide
Ammonia
Methane
Nitrous oxide
Which of the following components of the biogeochemical cycles is found in continental rock and dissolves in the water to enter the food chain?
Nitrogen
Oxygen
Phosphorous
Carbon
Which of the following levels of the biosphere would be the most complex?
Ecosystem
Population
Organism
Community
What might one reasonably assume to be the direct cause for the increase in the algae population?
The use of herbicide in the field under cultivation
The use of fertilizer in the field under cultivation
The increase in the copepod population
The ploughing under of last year's growth
The decrease in the copepod population would be most directly linked with the
lack of food
presence of herbicide in the environment
lack of oxygen due to bacterial decomposition of the algae
presence of fertilizer in the environment
Which of the following zones of the atmosphere is responsible for deflecting most of the charged and potentially lethal particles from the sun?
Stratosphere
Ionosphere
Magnetosphere
Troposphere
Which of the following layers of the atmosphere contains the greatest amount of ozone?
Stratosphere
Ionosphere
Magnetosphere
Troposphere
This diagram represents the idea that
both matter and energy form a cycle
neither matter nor energy form a cycle
matter cycles, but energy does not cycle
energy cycles, but matter does not cycle
The most likely impact that carbon in the atmosphere from fossil fuel combustion has on the biosphere is that
Earth's albedo is increasing
Earth's climate is growing warmer
the ocean tides are becoming erratic
the hours of sunlight per day are decreasing
Which of the following substances is a product of photosynthesis?
Water
Glucose
Mitochondria
Carbon dioxide
The idea that a toxin can increase in concentration as it passes through trophic levels is called
predation
a pyramid of biomes
a pyramid of numbers
biological magnification
In this food chain, the peregrine falcon is
the primary autotroph
a fourth-order consumer
a second-order consumer
at the fourth trophic level
The given statement illustrates the
pyramid of energy
law of conservation of mass
first law of thermodynamics
second law of thermodynamics
In this ecosystem, the energy entering and the energy leaving are in the forms of
light and heat
ATP and heat
light and motion
ATP and motion
Which of the following statements best explains why excess phosphates are harmful to the environment?
Phosphates destroy the ozone layer
Phosphates are poisonous to plants and animals
Phosphates react chemically to form phosphoric acid, a component of acid rain
Phosphates promote explosive growth of plants in bodies of water
Because a bog is acidic, most bacteria cannot survive in bog soil. Without bacteria in the soil, which of the biogeochemical cycles would be most affected?
Water cycle
Carbon cycle
Nitrogen cycle
Phosphorous cycle
Burning coal has a greater impact than the hydroelectric dam on global warming because burning coal releases which of the following gases as waste?
O2
CO2
SO2
H2O
The carbon and nitrogen atoms found on Earth today
were produced by consumers using the process of cellular respiration
are the same as those that were present on Earth 3 billion years ago
were produced by plants using the process of photosynthesis
are the result of a flow of matter into and out of the Earth
It is thought that the biochemical activities of these bacteria served to convert carbon dioxide to
oxygen
nitrogen
methane
carbon monoxide
The reason that water is a universal solvent is that
no substances dissolve in it
many substances dissolve in it
water covers a large portion of the Earth
water exists naturally in all three states of matter
Which of the following statements about cellular respiration and photosynthesis is false?
CO2 given off during cellular respiration is required for photosynthesis
Photosynthesis produced glucose, which is required for cellular respiration
Photosynthesis produces oxygen, which is required for cellular respiration
Cellular respiration produces oxygen, which is required for photosynthesis
In respiration, the energy not captured by ATP is
released as heat
eliminated along with oxygen
transferred to organic compounds
transferred to the next level of the food chain
The process of nitrogen fixation occurring in the root nodules of legumes is the conversion of
nitrates to proteins
ammonia to nitrates
atmospheric nitrogen into ammonia
nitrates to useful atmospheric nitrogen
Which trophic level has the greatest amount of biomass?
Producers
Herbivores
Top predators
Secondary consumers
Most of Earth's energy is derived from the Sun. Solar energy reaching Earth is
stored only in fossil fuels
mostly reflected back to space
stored in water, plants, and fossil fuels
entirely absorbed by the Earth's surface
What gaseous product of cellular respiration is also a necessary component for photosynthesis to occur?
Oxygen
Methane
Nitrogen
Carbon dioxide
Which of the following statements regarding the biosphere is false?
Heat escapes into space
Greenhouse gases retain heat
All life contains carbon molecules
The albedo of the polar ice caps creates CO2
Which of the following statements about trophic levels and relative amounts of biomass in an energy pyramid is true?
Producers have a biomass greater than all other trophic levels
Primary consumers have a biomass greater than both secondary consumers and producers
Producers have a biomass less than tertiary consumers but greater than secondary consumers
Tertiary consumers have a biomass less than quaternary consumers and greater than secondary consumers
Energy in the biosphere can be perceived as a balance between photosynthesis and chemosynthesis on one side and cellular respiration on the other. Which of the following statements supports this idea?
The heat energy that is released as waste product in cellular respiration is recycled into solar energy for photosynthesis
The amount of solar energy locked into the bonds of glucose in photosynthesis equals the amount of energy released by all organisms in cellular respiration
The amount of solar energy trapped into the bonds of glucose in chemosynthesis equals the amount of energy released by all organisms in cellular respiration
The amount of ATP energy and heat released from respiring organisms equals the energy locked into glucose in photosynthesis and chemosynthesis
In the nitrogen geochemical cycle, nitrogen is not made available for organisms through
nitrogen-fixing bacteria in soil and water that convert nitrogen gas into ammonium
nitrates in rainwater, which are created by lightning from atmospheric N2(g) and O2(g)
proteins and nucleic acids in the plants and animals that they consume for food
the diffusion of atmospheric N2(g) directly into bodily tissues
The release of excess phosphate-containing compounds, such as soap, into the environment can have the same devastating effect as
excess use of nitrate-containing fertilizers
burning of fossil fuels, which releases excess atmospheric carbon-dioxide
burning of fossil fuels, which releases excess nitrogen gas into the atmosphere
clear-cutting forests, which causes an increase in atmospheric carbon dioxide
An increased concentration of oxygen in Earth's atmosphere was not associated with
increased cellular respiration
decreased glucose production
increased number of autotrophs
decreased CO2 in the atmosphere
Decomposers help the carbon cycle by
releasing the carbon in dead plant and animal bodies back to the atmosphere
combining the carbon dioxide and oxygen released from photosynthesis to produce food
absorbing carbon from the animals that they decay and passing it along to their offspring
absorbing the carbon dioxide and water that animals breathe out and using it to produce food
The transfer of food energy from plants to consumers is a food chain. The most likely reason that a food chain rarely has more than four trophic levels is that
limiting abiotic factors act to reduce the number of organisms in each successive trophic level
the number of producers in the community cannot sustain a large number of consumers
third-level consumers are unable to transfer the energy of producers to fourth-level consumers
most of the energy in each trophic level is lost as heat when consumed by the next level
Deforestation effects the hydrologic cycle in all of the following ways except
increasing the amount of evaporation from soil
increasing the amount of condensation and precipitation
increasing the amount of water trapped as groundwater
reducing the amount of transpirational water loss to the atmosphere
Which of the following properties of water contributes in a large way to the hydrologic cycle?
Water is a universal solvent
Water has a high heat capacity
Water is found in all three states on Earth
Hydrogen bonding results in high cohesion of water molecules
The rise in oxygen levels in the atmosphere and the abundance of photosynthetic bacteria on ancient Earth are related in that
oxygen was released during the decomposition of the abundant cyanobacteria
cellular respiration by cyanobacteria released oxygen to the atmosphere as a waste product of the reaction
the increase in oxygen levels increased the rate of photosynthesis because oxygen is a requirement of photosynthesis
an increase in photosynthetic organisms increased oxygen levels because oxygen is a waste product of photosynthesis
The main characteristics used in naming terrestrial biomes are
fauna and flora
climate and terrain
geographical location and substrate
climax vegetation and geographical location
Migrating species of birds nest in this biome in the spring because there are swarms of insects to feed on and because the summer days are very long. The vegetation is low-lying and stunted due to permafrost and harsh winters. This biome is the
desert
tundra
grassland
tropical rainforest
Ecology is the study of
conservation, natural history and pollution
interactions between organisms and their biotic and abiotic environment
population growth and interaction
abiotic factors and how they affect organisms
The biome which has the greatest biodiversity is the
desert
tundra
boreal forest
rain forest
Eutrophication in a lake can be accelerated by
acid rain
addition of phosphorous
low temperatures
increased oxygenation
Identify the effect in a lake when temperature increases from 10 degrees to 21 degrees Celsius.
All life would be destroyed
Suspended solids would settle more rapidly
The mineral content would be altered seriously
The water's oxygen holding capacity would decrease
