Share 1st Six Weeks Environmental Science Review
Save to Folder
microscopic, free-floating, autotrophic organisms that function as producers in aquatic ecosystems
phytoplankton
a type of climate found in areas that are farther from the equator than the tropics, where there are changing seasons and mild weather that is neither too hot or too cold
temperate
Look at the image and choose the correct answer.
70
In a forest ecosystem, which of the following is NOT an example of a limiting factor that would greatly affect a rabbit population?
a rainy season
a disease that causes rabbits to die
the population of hawks that eat rabbits
grass available to eat
When a population grows past the ecosystem's carrying capacity, what happens to the population?
The population starts to die off and returns to the carrying
The population will go extinct due to lack of resources.
It continues to grow higher and higher.
Look at the image and choose the correct answer.
It will increase
Look at the image and choose the correct answer.
water availability
The reason that organisms cannot produce populations of unlimited size is that
There is no carrying capacity for the whole Earth.
Populations always stay exactly the same.
Species rarely compete with each other for food.
The resources of Earth are limited.
Which factor that limits a population’s size is important especially when population numbers become large and dense?
extreme weather
sea level height
competition for food
seasonal changes
In a large Maine forest with many animals and lots of space, there are only a small number of bears. Which of these most likely limits the population of bears in the forest?
space
supply of food
cloud cover in the atmosphere
types of trees in the area
A population of salamanders that live in a river require clear, fresh water to survive. New housing developments have caused tons of sediment to muddy the river. Which of these most likely will happen to the salamander population?
The salamanders will move across land to another river.
The salamanders go live on land.
Salamanders will decrease in number because of water quality
The salamanders will quickly adapt to live in muddy water
A scientist was studying a population of fish in a pond over a period of 10 years. He observed that the population increased each year for 3 years, and then remained nearly constant for the rest of the study. The best explanation for this
the fish had run out of food and all died
the fish had mutated into a different species
is the fish had reached carrying capacity
the fish had stopped reproducing
One species of Galapagos finches, the cactus finch, eats insects off cactus plants. A disease kills off most of the cacti in the Galapagos Islands. Which of these most likely would happen to the carrying capacity of the island?
Increase a small amount since the insect population decrease
Decrease a lot because there is less to eat.
Remain about the same since the finches would change diet
Mice produce a large number of offspring all year long, yet the number of mice within a given population changes very little from year to year. The stability of the population size is most likely the result of
the survival of more female mice than male mice
limiting factors that keep the population in check
the development of mutations in young mice
mice continuing to reproduce when its population is large
Ten breeding pairs of mink are introduced onto an island with no natural predators and a good supply of water and food. What will most likely happen to the mink population?
It will decrease and then increase forever.
It will die out.
It will remain constant due to equal birth and death
It will increase until it exceeds carrying capacity.
When a specific population grows past the ecosystem's carrying capacity, what happens to the population?
The population grows then finds a new carrying capacity
Density dependent factors reduce population
The population will go extinct due to lack of resources
Density independent factors reduce population
