WorksheetsBiodiversity and Populations
Total questions: 32
Worksheet time: 33mins
What happened to the tree population in this forest?
The number of trees stayed the same for two years and then began to decrease.
The number of trees stayed the same for two years and then began to increase.
The number of trees decreased for two years and then stayed the same.
The number of trees increased for two years and then stayed the same.
Continues to grow
The population starts to die off to return to carrying capcity
The population will go extinct due to lack of resources
The population grows then finds a new carrying capacity
limiting factors
wet
messy
found in rocks
stay the same
decrease
increase
Squirrel Population
Sunlight
Grass available
carrying capacity
limiting factor
total population
population density
emigration
abandonment
immigration
succession
more emigration occurs
more immigration occurs
the birth rate and death rate remain the same
______________ means moving into a population.
Immigration
Emmigration
Plantation
Repopulation
What year is the zebra population the lowest
1920
2000
1990
2020
What year is the lion population the highest
1920
1990
2000
2020
530
400
500
480
Scientists have been studying the size of three populations along the coast of Antarctica. In this ecosystem, penguins eat sardines (a type of small fish), and sardines eat zooplankton (very small animals that live in water). The data showed that all three populations were stable. Then the penguin population decreased suddenly.
What will likely happen to the size of the sardine population as a result?
stay the same. The size of its resource population did not change, so the amount of energy storage molecules available for the sardines did not change. There will be the same number of births and deaths in the sardine population.
decrease. A decrease in one population causes a decrease in the sizes of all other populations in the ecosystem.
increase. The smaller penguin population will need fewer energy storage molecules, so they will eat fewer sardines. This will lead to fewer deaths than births in the sardine population.
In a rainforest, anteaters eat ants, and ants eat aphids (a type of very small insect). The sizes of the populations have been stable for the last 10 years, but recently the size of the aphid population decreased. What will likely happen to the anteater population?
stay the same. Anteaters do not eat aphids, so the number of births and deaths in the anteater population will stay the same.
decrease. Fewer energy storage molecules will be available to the anteater population from the smaller ant population, so the anteater population will reproduce less. This will lead to fewer births than deaths in the anteater population.
increase. The smaller aphid population will leave more energy storage molecules available in the ecosystem for the anteater population, so there will be more births in the anteater population.
Scientists have been studying the size of three populations in a grassland. In this ecosystem, snakes eat rats, and rats eat grasshoppers. The data showed that all three populations were stable. Then the grasshopper population decreased suddenly. What will likely happen to the size of the rat population as a result?
stay the same. The size of their consumer population did not change, so the number of deaths in the rat population did not change. There will be the same number of births and deaths in the rat population.
increase. The smaller grasshopper population will need fewer energy storage molecules so there will be more energy storage molecules available for the rat population to reproduce. This will lead to more births in the rat population.
decrease. The smaller grasshopper population provides fewer energy storage molecules for the rat population, so the rat population will reproduce less. This will lead to fewer births than deaths in the rat population.
What is biodiversity?
different plants in an ecosystem
different animals in an ecosystem
different plants and animals in an ecosystem
How do humans threaten biodiversity?
land use
pollution
introduced species
all of the above
People paying for a tour of the rainforest is an example of...
resource oversue
captive breeding
ecotourism
habitat preservation
What do you call the mating of animals in zoos to preserve biodiversity?
captive breeding
selective breeding
gene pool diversity
What are some successful ways to preserve biodiversity? Check all that apply.
captive breeding
laws and treaties
habitat preservation
overhunting
True or False? Ecological value brings money into the ecosystem.
True
False
True or False? A keystone species influences the survival of may other species.
True
False
True or False? Healthy populations don't have diversity in traits.
True
False
True or False? Human activity is a major threat to the world's biodiversity.
True
False
a. People like to be able to see all the different plants and animals
b. If there aren't all the different species, there will be resources that aren't being used
c. Biodiversity is not as important as many people think
d. The more biodiversity there is in an ecosystem, the healthier an ecosystem is.
Making money off of ecotourism is known as a _________ value of biodiversity.
a. ecological
b. economic
c. ecosystem
d. ecolocation
Select ALL successful approaches to protecting biodiversity.
a. captive breeding
b. introduced species
c. habitat preservation
d. laws and treaties
What is a keystone species?
A species that influences many other species
A species that lives in or around rocks
Keys and stones have nothing to do with ecology
A keystone isn't a living thing, it's just a stone
The organisms with the most arrows in the food chain are the ______.
invasive species
keystone species
native species
symbiotic species
