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WorksheetsSemester exam
Total questions: 75
Worksheet time: 38mins
The Nonliving factors
The living factors
The area that an organism lives
True or False: If the Sun disappeared all life in the biosphere would still be able to survive
True
False
What percentage of all water is freshwater?
97%
3%
__________ is the process when water evaporates from plants leaves.
Evaporation
Condensation
Carbon
Which of the following are examples of a detritivore?
Worm
Mushroom
Vulture
Venus Fly Trap
What is this an image of?
Food Chain
Food Web
Ecological Pryamid
What is this an image of?
Food Chain
Food Web
Ecological Pryamid
_________ is the portion of Earth that supports all life.
Biosphere
Organism
Community
Biome
__________ is the scientific discipline in which the relationships among living organisms and the interaction the organisms have with their environments are studied.
Biology
Ecology
Chemistry
Pseudoscience
Determine approximately how much total energy is LOST from a three step food chain if 1000 calories enter at the producer level.
1000 calories
900 calories
990 calories
10 calories
As the trophic level _____ energy available will decrease.
Increases
Decreases
Stays the same
______ is when you have multiple food chains connected showing all of the different interactions in an ecosystem.
Food chain
Food Web
Energy Pyramid
______ is the total dry mass of all the organisms within a given area at a specific time.
Biomass
Ecology
Matter mass
None of the Above
______ are the base of every food chain.
Secondary consumers
Primary consumers
Producers
Apex consumer
Cows are what type of organism?
Producers
Carnivore
Herbivore
Omnivore
How does phosphorus get introduced into an ecosystem?
Weathering and erosion
Organic materials buried at the bottom of oceans forming rocks
animals and plants eliminating waste
What are the two major life processes that involve carbon and oxygen? aka the short term carbon cycle
Fuel combustion and open burning
Coal formation and photosynthesis
Photosynthesis and respiration
Death and Decay
Kelp is a large seaweed that grows to form underwater forest ecosystems. Which changes would you expect if humans begin removing large amounts of kelp from this ecosystem? Select 3 correct answers.
Snails that feed on kelp will decrease in number
The number of different species living in the kelp forest
Fish that feed on kelp-eating snails will increase in number
Populations of predators that prey on marine animals that hide in kelp forests will increase
Which are characteristics that can be used to identify a keystone species in any given ecosystem? Select 3 correct answers
They are the largest and most abundant species in an ecosystem
Their effects on an ecosystem tend to stabilize populations of other species in that system.
Their effect on an ecosystem is greater than expected based on their abundance and size.
Small changes in their population cause large changes in an ecosystem.
Which are components of an organism’s habitat?
Space/shelter
Air/water
Food
All of the above
Which can lead to change in an ecosystem?
increase in population of a species in the ecosystem
clearing of land within the ecosytem
air pollutants drifting into the ecosystem
all of the above
An ecosystem has an abundance of lizard species. Humans have begun capturing one of these species for sale as pets. Which scenario is possible if this lizard species disappears completely from this community?
The community can't be harmed because it has an abundance of lizard species.
The community can't be harmed by the loss of only one species or organism
The community could be harmed only if the lizard species has a mutually beneficial relationship with another organism in the community.
The community could be harmed if the species has a vital role in the ecosystem that no other organism can fulfill.
Predict Which characteristics would most likely be observed in an ecosystem that experiences a moderate level of disturbance?
Nutrient-poor soil
lack of mature species
mostly colonizer species
relatively high species diversity and a mix of colonizer and mature species.
Analyze Which ecological interactions are present in the community described below? Select all correct answers (2).
Pitcher plants are predators.
Frogs compete with pitcher plants.
Grass snakes and frogs are competitors.
winged insects have a symbiotic relationship with pitcher plants.
What function do pioneer species perform?
They steer the course of succession toward a specific climax community.
They break up rocks to form soil.
They shade smaller plants from intense sunlight.
They prevent nonnative species from moving in.
Contrast: Which statement correctly describes how a habitat differs from a niche?
A habitat is the place where an organism lives and a niche is the role filled by that organism along with its interactions within its community.
Habitats are the shelters used by animals for protection against predation and niches are the spaces plants use to put down roots for growth.
A habitat is the environment occupied by an entire ecosystem an niches are the individual environments occupied by organisms in that ecosystem.
Some organisms require large areas to live and these are called habitats. Other organisms require small areas and these are called niches.
Every domestic dog is a member of the species Canis lupus familiaris, yet there are hundreds of dog breeds. Which term accounts for this wide variety of dog breeds?
genetic diversity
species diversity
species richness
population diversity
A bird species and an insect species appear to have a mutualistic relationship. Which evidence would support this observation?
The insect population increases as the bird population is reduced by hunters.
The bird population remains unchanged when the insect species is wiped out by pesticides.
The insect population remains constant while the bird population increases as the result of habitat restoration.
The bird population increases after the insect population swells due to a ban on pesticides.
Biologists counting populations of ants in two different communities found that community A had a higher species richness than community B. What does this mean about how community A compares to community B?
Community A has a high number of ant species
Community A has a high number of ants of on species
Community has a high number of ants
Community A has a high number of ants of at least three species.
How does predation and parasitism differ?
Predation is a relationship involving animals only, whereas parasitism can involve a variety of organisms
In predation, one organism benefits cand the other is harmed, whereas in parasitism, both organisms benefit.
Parasites weaken their hosts, whereas predators immediately kill their prey.
Predators receive nutrients from their prey, whereas parasites receive no nutrients from their hosts.
Species ______ is the relative abundance of each species.
Evenness
Richness
Biome
This is the ability of an ecosystem to maintain its structure and function over a long period of time...
Sustainability
Biodiversity
Conservation
Extinction
What does species diversity refer to?
All of the differences between and within populations of species
The variety of genes contained within a species and among different species
all of the different habitats, niches communities, and ecological processes within a given location
What biome has the highest biodiversity on Earth?
temperate forest
desert
tropical rainforest
grassland
The number of different species in an ecosystem is called...
Sustainability
Biodiversity
Speciation
Variation
Lower biodiversity means...
Less sustainability
more sustainability
higher variety of genes
climax community
What are some ways that humans can increase biodiversity?
Reduce, reuse, recycle
set up protected areas and reduce pollution
help with the cleanup of our wild lands.
all of the above
True or False: The closer to the equator you are the more biodiverse it will be.
True
False
Which of the following does not indicate a high level of biodiversity....
More links in the food web
Many different plant species
High population of a single species
Being considered a climax community
This happens when every single organism organism of a species dies.
Conservation
Endangerment
Extinction
Preservation
Species ______ is the number of different species in a community.
Evenness
Abundance
Richness
Biome
What does ecosytem diversity refer to?
All of the differences between and within population of species
The variety of genes contained within a species and among different species.
All the different habitats, niches, communities, and ecological processes within a given location.
Some benefits of biodiversity include...
A variety of resources
healthier ecosystems
greater sustainability
all of the above
Which of the following has the highest biodiversity?
200 dolphins
5 elephants, 2 lions, and 1 zebra
100 ants, and 5 ant eaters
10000 gorillas
______ is a species that has a disproportionately large effect on a community relative to its size and abundance.
Keystone species
Hotspot
Extinct species
Biodiversity
Currently this is the leading cause of species extinction...
Habitat loss
Pollution
Disease
Pet stores
What does genetic diversity refer to?
All of the differences between and within populations of species
The variety of genes contained within a species and among different species
All the different habitats, niches, communities, and ecological processes within a given location.
_______ a population growth pattern in which a population grows slowly at first, followed by a period of exponential growth before stabilizing at a stable size: Produces a characteristic S-shaped curve
Carrying Capacity
Density-Dependent Factor
Density-Independent Factor
Logistic Growth
_______ is a factor for which the probability of occurrence and the magnitude of its effect are NOT influenced by the density of the affected population.
Carrying Capacity
Density-Dependent Factor
Density-Independent Factor
Logistic Growth
______ is a factor that shows the growth of a population by causing an increase in the mortality rate or a decrease in the birth rate as the population size increases.
Carrying Capacity
Density-Dependent Factor
Density-Independent Factor
Logistic Growth
______ is the maximum number of individuals that the environment of a population can support indefinitely.
Carrying Capacity
Density-Dependent Factor
Density-Independent Factor
Logistic Growth
______ is a graph that shows how many individuals born during the same interval remain alive over time.
Biotic Potential
Exponential Growth
Per Capita Growth Rate
Survivorship Curve
______ a pattern of population growth in which a population grows at a constant rate of increase for some time; exponential growth produces a characteristic J-shaped curve
Biotic Potential
Exponential Growth
Per Capita Growth Rate
Survivorship Curve
________ _ is a measure of how much a population could grow under ideal conditions; measured by its per capita growth rate determined only by the reproductive characteristics of the species
Biotic Potential
Exponential Growth
Per Capita Growth Rate
Survivorship Curve
________ is the rate of change in the size of the population, expressed in terms of the increase in the population per existing individual; it can be calculated by subtracting the per capita birth rate of the population.
Biotic Potential
Exponential Growth
Per Capita Growth Rate
Survivorship Curve
What is the primary difference between immigration and emigration?
Immigration is the movement into a population, while emigration is the movement out of a population.
Immigration is the movement of individuals out of a population, while emigration is the movement into a population.
Immigration increases population size, while emigration decreases it
Both terms refer to the same process of population movement
______ is a population growth pattern in which a population grows slowly at first, followed by a period of exponential growth before leveling off at a stable size. It produces a S- shaped curve.
Logistic Growth
Exponential Growth
Survivorship growth
_________ is the maximum number of individuals that the population's environment can support indefinitely.
Carrying capacity
Ideal conditions
Populations
Survivorship
What surrounds the nucleus?
Plasma membrane
Nuclear envelope
Cell Wall
None of the Above
Where are ribosomes found?
Cytoplasm
Rough E.R
Nucleus
Cytoplasm and Rough E.R
Which organelle is the "clean-up crew" (recycle)
Plasma Membrane
Lysosome
Golgi Apparatus
None of the Above
