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Worksheetsbiology (SB5.b)
Total questions: 15
Worksheet time: 9mins
During which of these processes is oxygen consumed? Select 3 answers.
when aerobic bacteria break down dead algae in a pond
when plants perform photosynthesis
when plants or animals perform aerobic cellular respiration
when forests are burned to clear land for farming
The bodies of all living things are based on carbon. Which of the following is the primary source of carbon in living things?
dissolved carbon dioxide in the biosphere
carbon compounds stored in fossil fuels
carbon dioxide in the atmosphere
carbon compounds in the soil
A student does an experiment to find out if the mass of an organism is related to how much oxygen they use in respiration. The student thinks that the more mass the organism has the more cells it has. The student sets up respirometers to see how quickly small, medium and large beetles use up oxygen. The student measures the remaining air in the respirometer every 2 minutes. The student uses rocks in a fourth respirometer. Suppose the student finds that the large beetles use the oxygen in 8 minutes, the medium in 13 minutes, and the small in 24 minutes. What claim could be made about the data?
Rocks are not alive
Larger beetles are made of more cells and to maintain homeostasis they need more oxygen for respiration.
Smaller beetles do not use aerobic cellular respiration.
This data would be considered inconclusive because the rocks did not have any change in volume of air available.
This is a diagram of the carbon cycle. Based on the information in the diagram, which of these processes removes carbon dioxide from the air or water?
photosynthesis
combustion of coal and oil
weathering of limestone
decomposition of plants and animals
Which of these could be a sequence in the carbon cycle?
animals break down glucose and release carbon dioxide > animals consume plants > plants take in carbon dioxide and produce glucose
plants take in carbon dioxide and produce glucose > animals consume plants > animals break down glucose and release carbon dioxide
plants take in carbon dioxide and produce glucose > animals break down glucose and release carbon > dioxide animals consume plants
animals consume plants > plants take in carbon dioxide and produce glucose > animals break down glucose and release carbon dioxide
This diagram shows the phosphorus cycle. According to the diagram, which of these are sources of phosphorus?
I.weathering of phosphate rocks
II.phosphate fertilizers
III.decomposition and excreta
IV.the air
all of these
I, II and III only
I and II only
III and IV only
Which of the following processes cycles matter through different parts of an ecosystem?
the nitrogen cycle
the water cycle
the carbon cycle
metabolism
Fill in the blanks: Bacteria in the soil and in the roots of legumes perform __________, which is one of many steps involved in cycling nitrogen through an ecosystem. Without _________, nitrogen gas could not be converted into a form usable by plants.
nitrification
denitrification
assimilation
nitrogen fixation
What are the main biological processes that cycle carbon dioxide and oxygen in the Earth's atmosphere?
digestion and absorption
respiration and photosynthesis
condensation and precipitation
circulation and respiration
Correct the statement: Plants transfer water in the water cycle through assimilation.
ammonification
transpiration
fixation
transcription
This diagram shows a food web. Which of these statements is true about the organism shown in the food web?
snakes are a source of energy for toads
squirrels provide foxes and owls with energy
mice and rabbits provide each other with energy
spiders gain energy directly from plants
This picture shows an energy pyramid. Which of the following explains why the number of organisms at each level decreases while moving up the energy pyramid?
The animals at higher levels are more competitive, so fewer animals survive.
_________ provides most of the oxygen on earth.
Decomposition
Cellular Respiration
Photosynthesis
Nitrogen Fization
This food chain shows an example of how energy flows through an ecosystem. What is the ultimate source of all of the energy that flows through this food chain?
the Sun
plant life
oxygen
primary consumers
Look at the energy pyramid. Is it possible for the top level to be wider than the level before it?
Yes, if climatic conditions are right, there can be more predators than prey.
No, it is not possible for a large population of coyotes to exist because of their mating habits.
No, it is not possible for an ecosystem to support more predators than prey.
Yes, if the population of coyotes swells, the top level will be larger than the level before it.
