How can migration affect ecosystems?

all of these are true concerning migration

In an ecosystem, the term biotic factor is used to describe

anything that is alive, was alive, or part of a living thing

Describe a negative consequence of human population growth.

cutting down forests & clearing land for construction

What is the scientific definition for the term competition?

struggle in a community for the same resources, like food

Why are predators so important to prey species populations?

they help limit the population size of prey species

What is the scientific definition for the term consumer?

an organism that finds and eats its food

Define the term niche.

the role (job) of the organism in an ecosystem

Explain what a limiting factor is

anything that restricts the size of a population

What makes the size of a population increase or decrease?

all of these can affect the size of a population

an organism that hunts and eats another organism for food

How might forest fires impact an ecosystem destroyed by the fires?

all of the above are true about the impact of forest fires

Which of the following would be considered adaptations for a butterfly?

patterns on wings allowing them to blend in with backgrounds, using a proboscis to drink nectar from the flowers of plants, spots on the wings that resemble eyes, bright colorful markings that help it attract a mate

What is a prey species?

a species that is hunted & eaten as food by another species

What is the scientific definition of the term producer?

an organism that makes its own food

Give two examples of limiting factors on ecosystems.

a tornado and migration, a forest fire and competition, a flood and predation, a forest fire and disease

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Populations & Ecosystems (Pretest)

20 termsStudBud Administration

populations & ecosystems

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Questions 20

Answers

1
How can migration affect ecosystems?
migrating organisms could become prey in the new ecosystem
migrating organisms might have no effects on the ecosystem
all of these are true concerning migration
migrating organisms could experience rapid population growth
2
The broad, flat leaves of a plant that are used to capture more sunlight are an example of a
behavioral adaptation
all of these
not an adaptation
structural adaption
3
In an ecosystem, the term abiotic factor is used to describe
anything that is non-living
anything that is alive, was alive, or part of a living thing
anything that has once been alive
anything that is living
4
In an ecosystem, the term biotic factor is used to describe
anything that is living
anything that is alive, was alive, or part of a living thing
anything that has once been alive
anything that is non-living
5
What diagram is made to show all the feeding relationships that exist within an ecosystem?
a food chain
a food pyramid
an energy pyramid
a food web
6
Describe a negative consequence of human population growth.
passing laws to restrict development in certain areas
cleaning pollutants from rivers and lakes
setting up conservation areas to protect wildlife
cutting down forests & clearing land for construction
7
What diagram is used to show that energy flows through an ecosystem?
a food chain
an energy pyramid
a food pyramid
a food web
8
What is the scientific definition for the term competition?
size of a population compared to the amount of space
when a population has abundant resources & ideal conditions
a group of people running a race to see who is faster
struggle in a community for the same resources, like food
9
Why are predators so important to prey species populations?
they compete with each other for food and water
they make humans more aware of prey species
they help limit the population size of prey species
all of the above
10
What is the scientific definition for the term consumer?
an organism that breaks down dead decaying material
an organism that eats dead, decaying matter
an organism that makes its own food
an organism that finds and eats its food
11
Define the term niche.
when one organism benifits but the other is harmed
the role (job) of the organism in an ecosystem
how an organism moves from one ecosystem to another
two groups of organisms fighting over resources
12
Explain what a limiting factor is
anything that restricts the size of a population
the size of the population compared to the amount of space
all the populations of different species in an area
largest # of individuals of 1 species in an environment
13
What makes the size of a population increase or decrease?
the number of predators in the ecosystem
all of these can affect the size of a population
how much food is available & how much competition there is
the number of mates available in the ecosystem
14
What is a predator?
an organism that is hunted by another organism
an organism that hunts and eats another organism for food
organism working with another organism so they both benifit
an organism that eats both plants and animals
15
How might forest fires impact an ecosystem destroyed by the fires?
all of the above are true about the impact of forest fires
rainwater will pick up more sediment and erode the ground
there will be an increase in competition between organisms
decreased biodiversity will impact the ecosystems recovery
16
Which of the following would be considered adaptations for a butterfly?
patterns on wings allowing them to blend in with backgrounds
using a proboscis to drink nectar from the flowers of plants
spots on the wings that resemble eyes
bright colorful markings that help it attract a mate
17
What is a prey species?
an organism that eats both plants and animals
a species that is hunted & eaten as food by another species
a species that hunts and eats other species for food
species working with another species so they both benifit
18
Which grouping could be considered a population in the Kalahari Desert?
all the living and nonliving parts of the desert
all the meercats in the desert
all of the sand and rocks in the desert
all of the plants and animals in the desert
19
What is the scientific definition of the term producer?
an organism that eats dead, decaying matter
an organism that breaks down dead decaying material
an organism that finds and eats its food
an organism that makes its own food
20
Give two examples of limiting factors on ecosystems.
a tornado and migration
a forest fire and competition
a flood and predation
a forest fire and disease

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