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 Grass

B White-tailed deer

C Mountain lions

D 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.