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- 1. Multiple Choice
A population of tigers lives in Bangladesh. Over 50 years, the size of the tiger population increased. What best explains the increase in the size of the tiger population?
A lot of tigers were born and none of them died.
The tiger population is always increasing because no animal eats tigers.
Fewer tigers were born than died.
More tigers were born than died.
- 2. Multiple Choice
Scientists have been studying the size of three populations in a grassland. In this ecosystem, lizards eat fireflies, and fireflies eat gnats (a type of insect). The data showed that all three populations were stable. Then the lizard population decreased suddenly. What will most likely happen to the size of the firefly population as a result?
increase. The smaller lizard population will need fewer energy storage molecules so they will eat fewer fireflies. This will lead to fewer deaths than births in the firefly population.
increase. The smaller lizard population will leave more energy storage molecules available for the firefly population to reproduce more. This will lead to more births in the firefly population.
stay the same. The size of its resource population did not change, so the amount of energy storage molecules available for the fireflies did not change. There will be the same number of births and deaths in the firefly population.
decrease. A decrease in any population causes a decrease in the sizes of all other populations in the ecosystem.
- 3. Multiple Choice
In Australia, both opossums and foxes eat rats. The sizes of the populations have been stable for the last 12 years, but recently the size of the opossum population increased. What will likely happen to the fox population?
increase. An increase in the size of any population leads to an increase in the sizes of all other populations in an ecosystem.
stay the same. Opossums and foxes do not eat each other, so the number of births and deaths in the fox population will stay the same.
decrease. The larger opossum population will leave fewer energy storage molecules for all other populations in the ecosystem, so the fox population will reproduce less. This will lead to fewer births than deaths in the fox population.
decrease. Fewer energy storage molecules will be available to the fox population from the smaller rat population, so the fox population will reproduce less. This will lead to fewer births than deaths in the fox population.
- 4. Multiple Choice
A population of bluefish lives in the Gulf of Mexico. Over the last 50 years, the size of the bluefish population has decreased. What best explains the decrease in the size of the bluefish population?
A lot of bluefish died and no new bluefish were born.
More bluefish were born than died.
Fewer bluefish were born than died.
The bluefish population is always decreasing because bluefish are always being eaten.
- 5. Multiple Choice
What do birds such as eagles and hawks need energy for?
flying
breathing
digesting food
all of the above
- 6. Multiple Choice
Two organisms fighting for the same resources is known as:
predation
competition
symbiosis
dancing
- 7. Multiple Choice
When a populations is known to be STABLE, it:
there are more deaths
there are more births
stays mostly the same, over time
horses live there
- 8. Multiple Choice
Energy storage molecules are:
molecules required only for the birth rate
potatoes
a molecule organisms use to stabilize a population
a molecule that organisms can use to release the energy needed to survive
- 9. Multiple Choice
An indirect effect is:
the result of one cause leading to an effect that causes one or more other effects
the result of one cause stopping a desired effect
the result of more than one cause leading to the death rate of a population
when there is a direct relationship between one organism and the next
- 10. Multiple Choice
A scientist who studies ecosystems is known as:
chemist
biologist
ecologist
zoologist
- 11. Multiple Choice
When something becomes different over time?
Change
Competition
Energy
Indirect Effect
- 12. Multiple Choice
Consumer population is when......?
A molecule that organisms can use to release the energy needed to survive
All the living and non-living things interacting in a particular area
A population that eats organisms from another population
When two or more populations use the same resource, such as the same food source
- 13. Multiple Choice
A molecule that organisms can use to release energy, and that is made of carbon, hydrogen, and oxygen atoms?
Lipid
Glucose
Energy
Fats
- 14. Multiple Choice
A food web is ?
A spiders way of catching food
Certain foods grouped in the same food group
A model that shows what eats what in an ecosystem
A storage area for food
- 15. Multiple Choice
One way to increase an organism's population is to....?
Increase births and decrease deaths
Births and deaths remain the same
Increase deaths
Decrease births
- 16. Multiple Choice
An example of consumer population is when...?
The weebug eats the green leaf
The weebug eats the weebug
The furbil eats the green leaf
The furbil eats the green leaf, the furbil and the weebug
- 17. Multiple Choice
True or False? If the amount being added and being removed are not equal then, the system will change.
True
False
Neither True or False
Both True and False
- 18. Multiple Choice
True or False? A system can be stable even as things are being added to it and removed from it.
Never true
Sometimes true
True
False
- 19. Multiple ChoiceLiving things, such as plants, animals, and bacteria.ecosystemorganismsfood webchange
- 20. Multiple ChoiceAll the living and nonliving things interacting in a particular area.ecosystemorganismscompetitionfood web
- 21. Multiple ChoiceA small part that is meant to show what the whole is like.changesampleconsumer populationfood web
- 22. Multiple ChoiceThe process of creating offspring.reproductioncompetitionindirect effectecosystem
- 23. Multiple ChoiceWithin a population organisms are ______ being born and dying.neveralwayssometimes
- 24. Multiple ChoiceA system can be stable even as things are being added to and removed from it. If the amounts being added and being removed are __________, then the system will changethe samenot equalequalsimilar
- 25. Multiple ChoiceIf there are more births than deaths in a given time, then the size of the population will _________. If there are fewer births than deaths, then the size of the population will _______.decrease, increaseincrease, decreaseincrease, increasedecrease, decrease
- Answer choicesTagsAnswer choicesTags