ecology 3 week assessment review
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ECOLOGY 3 WEEK ASSESSMENT REVIEW
Human activities can cause certain species to become extinct, by affecting the specie’s habitat or food supply.
Could species adapt to different surroundings and food over time?
What if the change in food or habitat happened very quickly?
Yes
No, adaptation takes time
What is an example of a herbivore?
Any organism that eats producers. Deer, Rabbit, Mouse etc…..
What are 2 synonyms for producer?
Plants or Autotrophs
Put the following on the pyramid in order of greatest biomass, or energy, or total number.
Grass WolfRaccoon Grasshopper
Grass
Grasshopper
Raccoon
Wolf
Producers
1st Consumer
2nd Consumer
3rd Consumer
Why is this shape useful?
Each trophic level supports a lesser amount of biomass.
Which population in this food chain is most likely to have the greatest biomass?
A GrassB White-tailed deerC Mountain lionsD Vultures
Grass →White-tailed deer → Mountain lions → Vultures
If an organism grows on a tree limb without harming the tree, what type of relationship would most likely be exhibited? Commensalism
What if the organism harmed the tree?Parasitism
Why are most humans considered omnivorous?
(omnivores)
Because they eat plants and animals.
According to this food web, which of these is an omnivore?F CaterpillarG MouseH AntJ Fly larva
Omnivores eat both plants and animals.Arrows point “to” the eater.
Eats corn.
Eats corn and grass
Eats corn and grass and caterpillars
Eats birds and caterpillars
Fox
Cat
Mouse Rabbit
Grass
Explain which animals would be affected if a disease killed out all the grass.
All would be affected because of lack of food.
After primary succession produces soil, in what order would these plants become established?
3rd 1st 2nd
If a bee eats nectar from flowers and pollinates the flowers at the same
time, what type of relationship would it be?
Mutualism, they both get something
good.
In a habitat, horned toads eat ants and ants eat grass. What would
happen to the number of ants and amount of grass if horned toads
became extinct?
The ants would increase in number and eat more of the grass
causing the grass to decrease.
In a habitat, horned toads eat ants and ants eat grass. What would happen if the number of horned
toads increased?
The amount of grass would increase because there would be
less ants to eat it.
If there are 50,000 kilocalories of energy at the producer level in a
habitat, how many kilocalories would be at the tertiary consumer level?
50 tertiary500 secondary
5,000 primary50,000 producer
If desert bats pollinate cactus flowers, where do you think they get their food?
From the cactus!
What type of relationship is it?
MutualismBoth get something good.
Give 2 examples of parasitic relationships. One benefits and the other is
harmed.Tick and dog, flea and cat, mistletoe
and tree, mosquito and human etc….
In the carbon cycle, dead plant and animal tissue become food for what two
groups of organisms?
Scavengers and Decomposers
Give 2 examples of each.
Hyenas FungiBuzzards BacteriaEtc…. Etc….
How could using a parasite for wasp larvae (immature wasps)
help control the wasp population?
The parasite could damage or kill the larvae, reducing the number that
would become adults and reproduce.
In the nitrogen cycle, what organisms that live in soil and on roots fix or make usable by plants the greatest amount of nitrogen?
Bacteria fix the most nitrogen.
What trophic level of a food web would be the most damaging if it
died out?
producers
Can you explain why?
All the energy in the system starts with the producers. All other levels would
run out of food eventually.
What trophic level contains the most energy?
Producer SecondaryConsumer
Primary Consumer
Tertiary Consumer
Producers
When two species try to capture the same resources, what is it
called?competition
Which species according to natural selection will survive?
The species with the best adaptations, which give it an advantage. Survival of the fittest.
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