Eoc Review Part 7 Unity And Diversity Of Life, Ecological Relationships (Page 3 of 3) in pdf

What are the producers in the food web to the right?

Blossoms, Nuts, bark, leaves

What are the primary consumers?

Bees, Deer, Mice, Rabbits, Insects

What are the secondary consumers?

Bear, Wolf, Red fox, Toad, Birds

What is the highest level consumer in this

food web? Bear

What is the ultimate source of energy for

this food web? Sun

What is a food chain? Give an example of one from this food web.

A pathway that shows what organisms eat.

Blossoms → Bees → Bear

Create an energy pyramid from the food chain (label the pyramid to right) using

the following organisms: leaves → insects → birds → redfox → bear

Where is the most energy in this pyramid? Where is the least energy in this

pyramid? Most Energy: Leaves. Least Energy: Bear

What happens to the amount of energy as it moves through the food

chain/web?

Only 10% of energy at one trophic level can be used by consumers at

the next trophic level.

Assume there are 10,000 kcal of energy in the leaves. Estimate the amount of energy in each of the

other levels of the energy pyramid.

Leaves 10,000 kcal → Insects 1,000 kcal → Birds 100 kcal → Red fox 10 kcal → Bear 1 kcal

What is the role of composers in an ecosystem?

Recycle materials so they can be reused

What are the effects of bioaccumulation (biomagnification) of pesticides on a food web? At bottom of

food web the poison is at low concentration and may cause no damage. As it moves up the food web, it

builds up in the higher-level organisms and may make top level consumers sick, sterile or even dead.

Compare logistic growth and exponential growth.

Logistic: Population increases until it hits an environmental limit (lack of food, shelter) preventing

further population growth. AKA, “S Curve.”

Exponential: Population grows exponentially indefinitely.

Explain the effect of population size (think humans, introduced species, etc.) on the environment.

Not enough resources for populations that are too big; humans also generate waste and pollution;

introduced species take over (e.g., kudzu), making it difficult for native species to survive

How do increases in human populations affect populations of other organisms?

Increases in human populations can decrease other populations through hunting, habitat destruction,

pesticides

What are some examples of sustainable practices and stewardship that can protect the environment?

Answers will vary. Reduce, reuse, recycle, drive less, use alternative energy, compost, etc.

Eoc Review Part 7 Unity And Diversity Of Life, Ecological Relationships Page 3