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
Kudzu, Boa Constrictor
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
Community
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
Elephant
Give an example of a population found in an African Savanna.
Elephant, giraffe, lions, grass
Give an example of a community found in the microbiome. What about in the African Savanna?
Mutualism, commensalism, parasitism
What are three types of symbiosis?
Mutualism
What type of symbiotic relationship involves both species benefiting?
What type of symbiotic relationship involves one species benefiting and one species being neither helped nor harmed?
commensalism
Parasitism
What type of symbiotic relationship involves one species benefiting and one species being harmed?
A clownfish and sea anemone; bees and flowers
Give 2 examples of a mutualistic relationship
Tapeworm and human; tick and human
Give 2 examples of a parasitic relationship.
Whale and barnacle
Give an example of commensalism.
Primary
What type of succession is seen after a volcanic eruption or glacier retreat that exposes new land?
What type of succession is seen after a natural disaster such as a flood, tsunami, or fire as long as soil is present?
secondary
Moss, lichen, and other organisms that begin to grow on bare rock in order to start a new community are called ________ species.
pioneer
Climax
A stable community with a mature forest is known as a _______community.
True
True or False: Biodiversity will help a species survive a variety of environmental conditions.
Left Graph
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
A type of limiting factor which affects growth rate independent of population density is called a ________ limiting factor.
independent
Floods and fires would be considered _______ limiting factors.
independent
Dependent
Availability of food and water would be considered ____ limiting factors
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.
What is a niche? What happens if 2 species of organisms occupy the same niche?
In DNA and proteins
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?
Phosphorus
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
Burning fossil fuels and car emissions
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
It is a pyramid of biomass which shows the total amount of organic matter in a trophic level.
What does this represent?
Grass
Primary producer
Mouse
Primary Consumer
Snake
Secondary Consumer
Tertiary Consumer
Hawk
Grass
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?
Eutrophication is when nitrogen and phosphorus(from fertilizers) flows into ponds and lakes
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.
