Explain relationships in ecosystems
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Middle School Life Science › Explain relationships in ecosystems
Atlantic salmon migrate to rivers in New England to reproduce and to the coast of Greenland to feed. Which of these scenarios could cause a decrease in salmon populations due to competition?
Limited food resources in Greenland
An abundance of food resources in Greenland
An abundance of space in Greenland
none of these
Explanation
The answer is "Limited food resources in Greenland"
Symbiosis is a close relationship between two species in which at least one species benefits. For the other species, the relationship may be positive, negative, or neutral. There are three basic types of symbiosis: mutualism, commensalism, and parasitism.
Mutualism is a symbiotic relationship in which both species benefit. Commensalism is a symbiotic relationship in which one species benefits while the other species is not affected. One species typically uses the other for a purpose other than food. Parasitism is a symbiotic relationship in which one species (the parasite) benefits while the other species (the host) is harmed.
A type of relationship that is not symbiotic but still seen often in ecology is the Predator-Prey relationship. 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.
What is the definition of symbiosis?
a close relationship between two species in which at least one species benefits
a close relationship between two species in which at least one species is harmed
a chemical reaction that involves reactants from one species and creates products for another
The most efficient way of recycling matter and energy to conserve environments
Explanation
The answer is "a close relationship between two species in which at least one species benefits."
Symbiosis is a close relationship between two species in which at least one species benefits. For the other species, the relationship may be positive, negative, or neutral. There are three basic types of symbiosis: mutualism, commensalism, and parasitism.
Mutualism is a symbiotic relationship in which both species benefit. Commensalism is a symbiotic relationship in which one species benefits while the other species is not affected. One species typically uses the other for a purpose other than food. Parasitism is a symbiotic relationship in which one species (the parasite) benefits while the other species (the host) is harmed.
A type of relationship that is not symbiotic but still seen often in ecology is the Predator-Prey relationship. 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.
What happens to predator populations when their prey are limited?
Predator populations decline due to competition
Predator populations decline due to abundance of resources
Predator populations increase due to competition
Predator populations increase due to abundance of resources
Explanation
Predators populations decline due to competition.
Symbiosis is a close relationship between two species in which at least one species benefits. For the other species, the relationship may be positive, negative, or neutral. There are three basic types of symbiosis: mutualism, commensalism, and parasitism.
Mutualism is a symbiotic relationship in which both species benefit. Commensalism is a symbiotic relationship in which one species benefits while the other species is not affected. One species typically uses the other for a purpose other than food. Parasitism is a symbiotic relationship in which one species (the parasite) benefits while the other species (the host) is harmed.
A type of relationship that is not symbiotic but still seen often in ecology is the Predator-Prey relationship. 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 statement best describes the interaction between frogs and insects?
Frogs are predators.
Frogs are parasites.
Frogs are a resource.
Frogs and insects are mutualistic.
Explanation
The answer is: Frogs are predators.
Symbiosis is a close relationship between two species in which at least one species benefits. For the other species, the relationship may be positive, negative, or neutral. There are three basic types of symbiosis: mutualism, commensalism, and parasitism.
Mutualism is a symbiotic relationship in which both species benefit. Commensalism is a symbiotic relationship in which one species benefits while the other species is not affected. One species typically uses the other for a purpose other than food. Parasitism is a symbiotic relationship in which one species (the parasite) benefits while the other species (the host) is harmed.
A type of relationship that is not symbiotic but still seen often in ecology is the Predator-Prey relationship. 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 above shows a predator-prey relationship over time. An example of a predator prey relationship is the lynx cat and the snow hare. Which of the following statements are true?
There are generally more hare than lynx because they are the food source.
When hare populations decline, lynx competition increases and therefore their population declines too.
When lynx populations increase, hare populations start to decline because there are more predators
all of these
Explanation
The answer is all of these.
Symbiosis is a close relationship between two species in which at least one species benefits. For the other species, the relationship may be positive, negative, or neutral. There are three basic types of symbiosis: mutualism, commensalism, and parasitism.
Mutualism is a symbiotic relationship in which both species benefit. Commensalism is a symbiotic relationship in which one species benefits while the other species is not affected. One species typically uses the other for a purpose other than food. Parasitism is a symbiotic relationship in which one species (the parasite) benefits while the other species (the host) is harmed.
A type of relationship that is not symbiotic but still seen often in ecology is the Predator-Prey relationship. 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.
A tapeworm needs to eat food that is already digested, so it lives in the intestines of a dogfish shark and derives nourishment from the shark. As a result of the tapeworm infestation, the shark is weakened and more vulnerable to disease and predation.
parasitism
mutualism
commensalism
predation
Explanation
The answer is parasitism.
Symbiosis is a close relationship between two species in which at least one species benefits. For the other species, the relationship may be positive, negative, or neutral. There are three basic types of symbiosis: mutualism, commensalism, and parasitism.
Mutualism is a symbiotic relationship in which both species benefit. Commensalism is a symbiotic relationship in which one species benefits while the other species is not affected. One species typically uses the other for a purpose other than food. Parasitism is a symbiotic relationship in which one species (the parasite) benefits while the other species (the host) is harmed.
A type of relationship that is not symbiotic but still seen often in ecology is the Predator-Prey relationship. 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.
What is it called when one organism benefits from a relationship while the other is harmed?
parasitism
commensalism
mutualism
predation
Explanation
The answer is parasitism.
Symbiosis is a close relationship between two species in which at least one species benefits. For the other species, the relationship may be positive, negative, or neutral. There are three basic types of symbiosis: mutualism, commensalism, and parasitism.
Mutualism is a symbiotic relationship in which both species benefit. Commensalism is a symbiotic relationship in which one species benefits while the other species is not affected. One species typically uses the other for a purpose other than food. Parasitism is a symbiotic relationship in which one species (the parasite) benefits while the other species (the host) is harmed.
A type of relationship that is not symbiotic but still seen often in ecology is the Predator-Prey relationship. 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.
A pearlfish spends the day inside the alimentary tract, or intestines, of a sea cucumber. The fish emerges from the sea cucumber at night to feed on small crustaceans. The pearlfish gets a safe place to live. The sea cucumber does not gain anything from the relationship, nor is it harmed. This is an example of which type of symbiotic relationship?
commensalism
mutualism
parasitism
predation
Explanation
The answer is commensalism.
Symbiosis is a close relationship between two species in which at least one species benefits. For the other species, the relationship may be positive, negative, or neutral. There are three basic types of symbiosis: mutualism, commensalism, and parasitism.
Mutualism is a symbiotic relationship in which both species benefit. Commensalism is a symbiotic relationship in which one species benefits while the other species is not affected. One species typically uses the other for a purpose other than food. Parasitism is a symbiotic relationship in which one species (the parasite) benefits while the other species (the host) is harmed.
A type of relationship that is not symbiotic but still seen often in ecology is the Predator-Prey relationship. 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 clownfish and the sea anemone are a famous example of a symbiotic relationship. The sea anemone offers the clownfish protection and leftover food while the sea anemones are given better water circulation because the clownfish fan their fins while swimming about. This is an example of which type of symbiotic relationship?
mutualism
parasitism
commensalism
predator-prey
Explanation
The answer is mutualism.
Symbiosis is a close relationship between two species in which at least one species benefits. For the other species, the relationship may be positive, negative, or neutral. There are three basic types of symbiosis: mutualism, commensalism, and parasitism.
Mutualism is a symbiotic relationship in which both species benefit. Commensalism is a symbiotic relationship in which one species benefits while the other species is not affected. One species typically uses the other for a purpose other than food. Parasitism is a symbiotic relationship in which one species (the parasite) benefits while the other species (the host) is harmed.
A type of relationship that is not symbiotic but still seen often in ecology is the Predator-Prey relationship. 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.
Corals feed off the byproducts of a microscopic algae living within their own tissue, called zooxanthellae. The photosynthetic activity of the algae is vital to the survival of the coral animals, which use the energy to extract calcium from the seawater and build their calcareous skeletons. The zooxanthellae are protected by the hard coral and obtain plant nutrients from the coral. This is an example of:
mutualism
commensalism
parasitism
predation
Explanation
The answer is mutualism.
Symbiosis is a close relationship between two species in which at least one species benefits. For the other species, the relationship may be positive, negative, or neutral. There are three basic types of symbiosis: mutualism, commensalism, and parasitism.
Mutualism is a symbiotic relationship in which both species benefit. Commensalism is a symbiotic relationship in which one species benefits while the other species is not affected. One species typically uses the other for a purpose other than food. Parasitism is a symbiotic relationship in which one species (the parasite) benefits while the other species (the host) is harmed.
A type of relationship that is not symbiotic but still seen often in ecology is the Predator-Prey relationship. 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.