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WorksheetsBiology (Ecology 2)
Total questions: 12
Worksheet time: 18mins
A species in which other species in an ecosystem largely depend. If removed, the ecosystem would change drastically. This is called a ______ species.
Keystone
A non-native species that has been introduced into an area and can cause harm to the environment is a ______ species.
Invasive
Community
Which of the following is an invasive species?
Population
A group of individuals that belong to the same species that live in one area is a
Kudzu, Boa Constrictor
Different populations that live together in the same place are called a
Put the following in order moving from smallest to largest:
organism
population
community
ecosystem
biosphere
Mutualism, commensalism, parasitism
Give an example of a population found in an African Savanna.
Elephant
Give an example of a community found in the microbiome. What about in the African Savanna?
What type of symbiotic relationship involves one species benefiting and one species being neither helped nor harmed?
What are three types of symbiosis?
Mutualism
What type of symbiotic relationship involves both species benefiting?
Elephant, giraffe, lions, grass
commensalism
Primary
What type of symbiotic relationship involves one species benefiting and one species being harmed?
Parasitism
Give 2 examples of a mutualistic relationship
Tapeworm and human; tick and human
Give 2 examples of a parasitic relationship.
A clownfish and sea anemone; bees and flowers
Give an example of commensalism.
Whale and barnacle
What type of succession is seen after a volcanic eruption or glacier retreat that exposes new land?
Climax
secondary
What type of succession is seen after a natural disaster such as a flood, tsunami, or fire as long as soil is present?
pioneer
True
A stable community with a mature forest is known as a _______community.
Moss, lichen, and other organisms that begin to grow on bare rock in order to start a new community are called ________ species.
True or False: Biodiversity will help a species survive a variety of environmental conditions.
A type of limiting factor which affects growth rate independent of population density is called a ________ limiting factor.
This graph is exponential growth, which is rapid growth.
This graph is logistic growth. Growth is exponential at first and then a carrying capacity is reached because of limiting factors.
Right Graph
A type of limiting factor which affects population size in response to the density of the population is called a ________ limiting factor.
dependent
Left Graph
independent
Floods and fires would be considered _______ limiting factors.
independent
Dependent
Availability of food and water would be considered ____ limiting factors
In DNA and proteins
What is a niche? What happens if 2 species of organisms occupy the same niche?
Phosphorus
How do we use nitrogen in our bodies?
Nitrogen fixing bacteria converts nitrogen gas into ammonia. Nitrogen fixing bacteria convert nitrogen into a form that plants can use.
Why is nitrogen-fixing bacteria so important to plants?
A niche is an organism’s way of life. A niche is the way an organism uses its physical and biological conditions in which it lives. It includes habitat, resources and the organisms role in the environment; If 2 species live in the same niche, competition will occur.
Which nutrient does not use the atmosphere as a reservoir?
Put the following in order to best illustrate the cycling of matter and energy among organisms?
Sun
plants
insects
Small animals
large animals
decomposers
It is a pyramid of biomass which shows the total amount of organic matter in a trophic level.
What leads to an increase in carbon dioxide in the atmosphere?
10%; It is lost as heat.
How much energy (in percent) moves from one trophic level to another? What happens to the rest of it
Burning fossil fuels and car emissions
What does this represent?
Snake
Primary producer
Tertiary Consumer
Primary Consumer
Mouse
Secondary Consumer
Grass
Hawk
Eutrophication is when nitrogen and phosphorus(from fertilizers) flows into ponds and lakes
Examine the food web. Which organism contains the greatest amount of stored energy?
the frog and small bird would not have any food to eat and would starve.
What would happen if an insecticide was sprayed in the area?
Grass
What is the effect of eutrophication(excess nitrogen and phosphorus) on a pond ecosystem?
algae
What organism will increase in number?
This leads to low oxygen levels(hypoxia) in the lake, and then many other organisms such as fish and plants will die.
What will happen to the other organisms in the pond?
What is the relationship between predator and prey?
The number of (a) affects the number of (b) . As prey numbers (c) , so does the number of predators. As prey numbers (d) , so does the number of predators.
