Understand the effect of limited resources on populations
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Middle School Life Science › Understand the effect of limited resources on populations
In desert environments, fresh water is a limited resource. Which of these is NOT a way organisms have responded to the lack of availability of water?
animals spend more time in the sun than they usually would
plants like cacti have adapted ways of conserving water
top predators like lions will defend their territories with water from competition
some animals will die and further limit food resources for other animals
Explanation
The answer is "animals spend more time in the sun than they usually would." This would require more water from their bodies to be used in the cooling process when water is already scarce. Most animals spend more time in the shade when water is not readily available.
Resources are defined as a substance or object in the environment required by an organism for normal growth, maintenance, and reproduction. Resources can be consumed by one organism and, as a result, become unavailable to another organism. When resources are limited, “competition,” increases and some populations of organisms will decrease. Some individuals may even be weaker or smaller without the resources they need.
Natural disasters, environmental changes, and humans can all have an effect on the availability of resources. When a drought occurs, many plants and animals die. When forests are cleared for human use, animals and plants do not have habitat.
Some animals are technically a “resource” for others. The predator prey relationship consists of the interactions between two species and their consequent effects on each other. In the predator prey relationship, one species is feeding on the other species. The prey species is the animal being fed on, and the predator is the animal being fed. Usually these populations go through cycles.
The image shows growth for population A and population B. Which population has unlimited resources?
population A
population B
both of these
neither of these
Explanation
The answer is "population A" because it's growing exponentially and does not level out.
Resources are defined as a substance or object in the environment required by an organism for normal growth, maintenance, and reproduction. Resources can be consumed by one organism and, as a result, become unavailable to another organism. When resources are limited, “competition,” increases and some populations of organisms will decrease. Some individuals may even be weaker or smaller without the resources they need.
Natural disasters, environmental changes, and humans can all have an effect on the availability of resources. When a drought occurs, many plants and animals die. When forests are cleared for human use, animals and plants do not have habitat.
Some animals are technically a “resource” for others. The predator prey relationship consists of the interactions between two species and their consequent effects on each other. In the predator prey relationship, one species is feeding on the other species. The prey species is the animal being fed on, and the predator is the animal being fed. Usually these populations go through cycles.
Which of the following is a limiting factor in an ecosystem?
all of these
availability of food
habitat
availability of water
Explanation
The answer is "all of these."
Resources are defined as a substance or object in the environment required by an organism for normal growth, maintenance, and reproduction. Resources can be consumed by one organism and, as a result, become unavailable to another organism. When resources are limited, “competition,” increases and some populations of organisms will decrease. Some individuals may even be weaker or smaller without the resources they need.
Natural disasters, environmental changes, and humans can all have an effect on the availability of resources. When a drought occurs, many plants and animals die. When forests are cleared for human use, animals and plants do not have habitat.
Some animals are technically a “resource” for others. The predator prey relationship consists of the interactions between two species and their consequent effects on each other. In the predator prey relationship, one species is feeding on the other species. The prey species is the animal being fed on, and the predator is the animal being fed. Usually these populations go through cycles.
Limited resources are affecting population growth in a habitat. What type of graph best represents this scenario?
logarithmic, or "S shaped" curve
exponential curve, or "J shaped" curve
climate curve
linear
Explanation
The answer is "logarithmic, or "S shaped" curve" because when resources are limited, populations can only increase to a certain carrying capacity then population growth will level out.
Resources are defined as a substance or object in the environment required by an organism for normal growth, maintenance, and reproduction. Resources can be consumed by one organism and, as a result, become unavailable to another organism. When resources are limited, “competition,” increases and some populations of organisms will decrease. Some individuals may even be weaker or smaller without the resources they need.
Natural disasters, environmental changes, and humans can all have an effect on the availability of resources. When a drought occurs, many plants and animals die. When forests are cleared for human use, animals and plants do not have habitat.
Some animals are technically a “resource” for others. The predator prey relationship consists of the interactions between two species and their consequent effects on each other. In the predator prey relationship, one species is feeding on the other species. The prey species is the animal being fed on, and the predator is the animal being fed. Usually these populations go through cycles.
Sharks are often hunted for their fins. The overfishing of sharks can affect the availability of phytoplankton even though they are at opposite ends of their food chain. How is this possible?
any disruption in a food chain will have affects on other populations of organisms in the same food web
overfishing of sharks changes the water quality
humans will hunt for more phytoplankton when they're hunting for more sharks
phytoplankton live on shark fins
Explanation
The answer is "any disruption in a food chain will have affects on other populations of organisms in the same food chain."
Resources are defined as a substance or object in the environment required by an organism for normal growth, maintenance, and reproduction. Resources can be consumed by one organism and, as a result, become unavailable to another organism. When resources are limited, “competition,” increases and some populations of organisms will decrease. Some individuals may even be weaker or smaller without the resources they need.
Natural disasters, environmental changes, and humans can all have an effect on the availability of resources. When a drought occurs, many plants and animals die. When forests are cleared for human use, animals and plants do not have habitat.
Some animals are technically a “resource” for others. The predator prey relationship consists of the interactions between two species and their consequent effects on each other. In the predator prey relationship, one species is feeding on the other species. The prey species is the animal being fed on, and the predator is the animal being fed. Usually these populations go through cycles.
Which of these is NOT a resource?
plastic
water
organisms
space
Explanation
The answer is plastic.
Resources are defined as a substance or object in the environment required by an organism for normal growth, maintenance, and reproduction. Resources can be consumed by one organism and, as a result, become unavailable to another organism. When resources are limited, “competition,” increases and some populations of organisms will decrease. Some individuals may even be weaker or smaller without the resources they need.
Natural disasters, environmental changes, and humans can all have an effect on the availability of resources. When a drought occurs, many plants and animals die. When forests are cleared for human use, animals and plants do not have habitat.
Some animals are technically a “resource” for others. The predator prey relationship consists of the interactions between two species and their consequent effects on each other. In the predator prey relationship, one species is feeding on the other species. The prey species is the animal being fed on, and the predator is the animal being fed. Usually these populations go through cycles.
Which of these human actions most limits resources for animals?
building a shopping mall
making a community garden
going camping and swimming in the river
making laws that protect a national forest
Explanation
The answer is building a shopping mall
Resources are defined as a substance or object in the environment required by an organism for normal growth, maintenance, and reproduction. Resources can be consumed by one organism and, as a result, become unavailable to another organism. When resources are limited, “competition,” increases and some populations of organisms will decrease. Some individuals may even be weaker or smaller without the resources they need.
Natural disasters, environmental changes, and humans can all have an effect on the availability of resources. When a drought occurs, many plants and animals die. When forests are cleared for human use, animals and plants do not have habitat.
Some animals are technically a “resource” for others. The predator prey relationship consists of the interactions between two species and their consequent effects on each other. In the predator prey relationship, one species is feeding on the other species. The prey species is the animal being fed on, and the predator is the animal being fed. Usually these populations go through cycles.
If a drought were to occur which of these would be affected by the lack of resources?
all of these would be effected
plants
animals
humans
Explanation
The answer is "all of these would be effected" because all organisms need water. Additionally some animals eat plants, and humans eat animals.
Resources are defined as a substance or object in the environment required by an organism for normal growth, maintenance, and reproduction. Resources can be consumed by one organism and, as a result, become unavailable to another organism. When resources are limited, “competition,” increases and some populations of organisms will decrease. Some individuals may even be weaker or smaller without the resources they need.
Natural disasters, environmental changes, and humans can all have an effect on the availability of resources. When a drought occurs, many plants and animals die. When forests are cleared for human use, animals and plants do not have habitat.
Some animals are technically a “resource” for others. The predator prey relationship consists of the interactions between two species and their consequent effects on each other. In the predator prey relationship, one species is feeding on the other species. The prey species is the animal being fed on, and the predator is the animal being fed. Usually these populations go through cycles.
Which is most likely the reason that sharing habitat with lions would cause there to be limited resources for cheetahs?
They feed on the same prey
They use so much space
They drink a lot of water
They sit under the trees
Explanation
The answer is "they feed on the same prey."
Resources are defined as a substance or object in the environment required by an organism for normal growth, maintenance, and reproduction. Resources can be consumed by one organism and, as a result, become unavailable to another organism. When resources are limited, “competition,” increases and some populations of organisms will decrease. Some individuals may even be weaker or smaller without the resources they need.
Natural disasters, environmental changes, and humans can all have an effect on the availability of resources. When a drought occurs, many plants and animals die. When forests are cleared for human use, animals and plants do not have habitat.
Some animals are technically a “resource” for others. The predator prey relationship consists of the interactions between two species and their consequent effects on each other. In the predator prey relationship, one species is feeding on the other species. The prey species is the animal being fed on, and the predator is the animal being fed. Usually these populations go through cycles.
The image shows growth for population A and population B. Which population has limited resources?
population A
population B
both of these
neither of these
Explanation
The answer is population B, because it has reached carrying capacity and is no longer growing.
Resources are defined as a substance or object in the environment required by an organism for normal growth, maintenance, and reproduction. Resources can be consumed by one organism and, as a result, become unavailable to another organism. When resources are limited, “competition,” increases and some populations of organisms will decrease. Some individuals may even be weaker or smaller without the resources they need.
Natural disasters, environmental changes, and humans can all have an effect on the availability of resources. When a drought occurs, many plants and animals die. When forests are cleared for human use, animals and plants do not have habitat.
Some animals are technically a “resource” for others. The predator prey relationship consists of the interactions between two species and their consequent effects on each other. In the predator prey relationship, one species is feeding on the other species. The prey species is the animal being fed on, and the predator is the animal being fed. Usually these populations go through cycles.