Births/Deaths
If the number of births and deaths in a given time are equal then the population size will be _____.
stable
When something stays mostly the same over time
stability
What is energy?
The ability to make things move or change
True or False:
When two or more populations compete, a change to one population affects the size of the other.
True
a group of atoms joined together in a particular way
Molecule
If there are more births than deaths in a given time, then the size of the population will _____
increase
All living & nonliving things interacting in a specific area
ecosystem
What do birds need energy for? (Hint: 3 answers)
Flying, breathing, digesting food
Organisms in consumer populations get energy storage molecules from eating organisms in _____ _____
Resource populations
living things, such as plants, animals, and bacteria
organisms
In the northwestern United States, both coyotes and wolves eat deer. The sizes of the populations have been stable for the last 6 years, but recently the size of the wolf population increased. What will likely happen to the coyote population?
Decrease. Fewer energy storage molecules will be available to the coyote population from the smaller deer population, so the coyote population will reproduce less. This will lead to fewer births than deaths in the coyote population
A population that eats organisms from another population.
Consumer Population
What do Tigers and Zebras need energy for? (Hint: 3 answers)
Running, breathing, digesting food
The ________ the resource population, the more energy storage molecules are available for its consumer populations.
larger
a small part that is meant to show what the whole is like
In an 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?
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
Food Web
a model that shows what eats what in an ecosystem
Where do trout get their energy from?
Insects
Are zebras or lions the consumer population?
lions
The process of creating offspring
reproduction
A population of deer lives in Canada. Over 50 years, the size of the deer population decreased. What best explains the decrease in the size of the deer population?
Fewer deer were born than died
Energy Storage Molecules
a molecule that organisms can use to release the energy needed to survive
Where do ants get their energy from?
Aphids
Furbils eat weebugs. Weebugs eat greenleafs. What causes MORE births in the weebug population?
Increase in greenleaf population
A population of Ronan's has increase dramatically. What must be true about the population's energy storage molecules?
They have increased