What happens in a commensalism relationship?

One benefits, the other is unaffected

What does a survivorship curve help scientists understand?

How survival rates change over time for a species

Why do parasites and disease spread faster in dense populations?

Crowding makes transmission easier among individuals

What is exponential growth in a population?

Rapid population increase under ideal conditions

What can cause the carrying capacity of an environment to change?

Events like flooding that affect resources and shelter

What does an ecological niche include for a species?

All the physical, chemical, and biological needs for survival

What happens during logistic growth in a population?

Slow growth, then rapid growth, then stabilization

What is ecosystem resilience?

The ability of an ecosystem to recover after a disturbance

How does competition affect population growth?

It limits growth as resources become scarce

What is a keystone species?

A species that has a major impact on the entire ecosystem

What is the role of the predator in predation?

It captures and feeds on another organism

What describes density-independent limiting factors?

They affect populations no matter how crowded they are

A relationship where both species benefit

What is primary succession?

The development of an ecosystem in a previously uninhabited area

What is the carrying capacity of an environment?

The largest population size it can support long-term

How does predation act as a limiting factor?

Predator and prey populations control each other

What defines a parasitism relationship?

One organism benefits, the other is harmed

What does biodiversity measure in an ecosystem?

The variety of different species, not individual counts

When does competition occur between organisms?

When both need the same limited resource to survive

What is true about density-dependent limiting factors?

Their impact increases with population size

What is ecological succession?

A sequence of biotic changes that builds or rebuilds a community

What is symbiosis in an ecosystem?

A close relationship between different species living in contact

What is the purpose of the mark–recapture method in biology?

To estimate the size of a wild animal population

What is quadrat sampling mainly used for in ecology?

Studying coral reefs and forest plant clusters

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Bio_Unit4_Rev

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Questions 28

Answers

1
What happens in a commensalism relationship?
Both species are harmed equally
Both species compete for the same resources
One benefits, the other is unaffected
One is helped while the other is hurt
2
What does a survivorship curve help scientists understand?
Which species live in the same geographic area
How survival rates change over time for a species
The speed at which animals migrate each season
How fast populations grow during a single year
3
Human activities like forest clearing and road building can lead to the destruction of entire ecosystems.
True
False
4
Why do parasites and disease spread faster in dense populations?
Crowding makes transmission easier among individuals
Hosts become immune more quickly in less crowded regions
Parasites can only survive in areas with poor food supplies
Diseases evolve faster when more predators are present in the ecosystem
5
What is exponential growth in a population?
Slow and steady growth over many decades or years
Rapid population increase under ideal conditions
A rise and fall in numbers during migration
Population shrinking due to limited space over period of time
6
What can cause the carrying capacity of an environment to change?
The number of predators moving into the area
Events like flooding that affect resources and shelter
Seasonal changes in animal migration routes
How quickly offspring grow after birth
7
Resistance is the ability of an ecosystem to recover after a disturbance.
True
False
8
What does an ecological niche include for a species?
All the physical, chemical, and biological needs for survival
Only the type of shelter a species uses to reproduce
The food chain level the species belongs to exclusively
The number of predators a species has in its habitat
9
Habitat includes only the biotic factors in the environment where an organism lives.
True
False
10
What happens during logistic growth in a population?
Slow growth, then rapid growth, then stabilization
Sudden drops in size after food and water run out
Immediate decline followed by steady recovery over a period of time
Constant and rapid increase without limits
11
What is ecosystem resilience?
The ability of an ecosystem to recover after a disturbance
The strength of predators in maintaining population control
The total number of species that live in an ecosystem
The speed at which new species evolve in a habitat
12
How does competition affect population growth?
It only affects predators competing for the same prey over time
It encourages cooperation, increasing survival chances in all species
It limits growth as resources become scarce
It causes species to evolve at a faster rate due to pressure
13
What is a keystone species?
A species that has a major impact on the entire ecosystem
A species that only survives by living inside another organism
A species that is always the largest predator in its habitat
A species with the highest population in the ecosystem
14
What is the role of the predator in predation?
It captures and feeds on another organism
It breaks down dead organisms for nutrients
It hides from prey to avoid competition
It protects smaller animals from being hunted
15
What describes density-independent limiting factors?
They only happen when competition between species increases drastically
Their effects depend heavily on the size and age of the population
They are caused by high birth rates and limited food supply in dense areas
They affect populations no matter how crowded they are
16
Weather events like floods or droughts can reduce or eliminate populations by destroying essential resources.
False
True
17
What is mutualism?
A form of defense where one species hides from another
A situation where one species harms another
A relationship where both species benefit
A competition between two species for food
18
What is primary succession?
The seasonal migration of species to warmer climates
The development of an ecosystem in a previously uninhabited area
The slow replacement of animals within a forest ecosystem
The rebuilding of a habitat after a small disturbance
19
What is the carrying capacity of an environment?
The fastest a species can grow in perfect conditions
The number of predators a habitat can sustain
The average size of a group during migration
The largest population size it can support long-term
20
How does predation act as a limiting factor?
Predators thrive regardless of prey availability or behavior
Prey always outnumber predators, causing imbalance over time
Predator and prey populations control each other
Only prey populations are affected while predators remain stable
21
What defines a parasitism relationship?
Both organisms gain something from the interaction
One organism benefits, the other is harmed
Both organisms are equally harmed over time
Neither organism is affected in any way
22
What does biodiversity measure in an ecosystem?
The speed at which species grow in a habitat
The total population of all organisms in an area
The variety of different species, not individual counts
The number of ecosystems found in one region
23
When does competition occur between organisms?
When animals migrate to avoid harsh seasonal changes
When different species share a mutual food source equally
When predators and prey live in the same ecosystem
When both need the same limited resource to survive
24
What is true about density-dependent limiting factors?
They only occur when environments are destroyed by humans
Their impact increases with population size
They affect species equally regardless of population
Their influence depends on climate, not population
25
What is ecological succession?
The rapid extinction of species due to natural disasters
A sequence of biotic changes that builds or rebuilds a community
The movement of animals from one ecosystem to another
A cycle of predator-prey interactions in a food web
26
What is symbiosis in an ecosystem?
An interaction where organisms avoid each other completely
A close relationship between different species living in contact
The process of predators feeding on weaker organisms
A type of competition where two species fight for dominance
27
What is the purpose of the mark–recapture method in biology?
To estimate the size of a wild animal population
To record animal sounds in different regions
To identify predator-prey food chains in ecosystems
To find out what animals eat during migration
28
What is quadrat sampling mainly used for in ecology?
Observing how large animals hunt together
Measuring how fast predators move in zones
Studying coral reefs and forest plant clusters
Tracking where birds migrate each season

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