Ecology part 1 review 2025 fall semester final

Wayground slide deck for review

Multiple Choice

A student investigates how grasshoppers are affected by an environment changing due to drought conditions. Based on the data, which statement best predicts how subsequent populations of the grasshoppers may be affected by the changing environment?

• the body size of the brown grasshopper will decrease
• the population of green grasshoppers will increase
• the population of brown grasshoppers will increase
• the number of offspring of the green grasshoppers will increase

Open Ended

What are the levels of organization in the ecosystem?

Draw

Label each level of ecological hierarchy, and put a number under each picture to order them from least inclusive to most inclusive.

Reorder

Arrange the following from smallest to largest.

• Individual

• Population

• Community

• Ecosystem

• Biosphere

1

2

3

4

5

• 1
• 2
• 3
• 4
• 5

Multiple Choice

In this photo, what is an abiotic factor?

• Deer

• Grass

• rain

Multiple Choice

What are some biotic factors in this image? 

• water, sunlight, dirt, air
• birds and plants
• water, plants, and birds 

Multiple Choice

In the diagram, which arrow(s) represents the warming that's caused by the greenhouse effect?

• 1 and 3

• 2

• 4 and 6

• 5

• 7

Multiple Choice

What is the primary role of greenhouse gases in the greenhouse effect?

• To reflect sunlight

• To absorb and re-radiate heat

• To block all sunlight

• To cool the earth

Multiple Select

What are TWO of the three main greenhouse gases?

• Oxygen, O2

• water H2O

• Carbon dioxide, CO2

• Hydrogen, H2

Multiple Choice

The graph shows changes in carbon dioxide

(CO2) concentrations and surface temperatures

on Earth from the years 1880 to 2000.

Why do carbon dioxide concentrations and

surface temperatures show the relationship seen

in the graph?

• because lower carbon dioxide levels mean more

  heat is retained in Earth's atmosphere

• because higher carbon dioxide levels mean

  more heat is retained in Earth's atmosphere

• because lower carbon dioxide levels mean less

  heat is retained in Earth's atmosphere

• because higher carbon dioxide levels mean less

  heat is retained in Earth's atmosphere

Multiple Choice

What's a population?

• A population refers to the total number of organisms on Earth.
• A population is a collection of different species in one location.
• A population is a random sample of individuals from various habitats.
• A population is a group of individuals of the same species in a specific area.

​

What do you remember about how populations grow?

Open Ended

These graphs represent two types of population growth. Do you remember their names? What are the differences between them?

Multiple Choice

What does the graph represent?

• Emigration
• Exponential growth
• Immigration
• Logistic Growth

Multiple Choice

What is the main difference between exponential growth and logistic growth?

• Exponential growth has limits

• Logistic growth is faster

• logistic growth accounts for limits

• Logistic growth has no phases

Multiple Choice

What's happening at the flat part of the curve at the top?

• The population is rapidly increasing.
• The population is declining steadily.
• The population is fluctuating wildly.
• The population is stable and at carrying capacity.

Open Ended

Explain the relationship between carrying capacity, limiting factors, and population size.

Categorize

Options (8)

Competition

Predation

Parasitism

Disease

Earthquake

Forest fire

Tsunami

Hurricane

Categorize these limiting factors into density-dependent and density-independent

Density-Independent

Density-Dependent

Multiple Choice

Which is the actual point of a food chain/ food web?

• Describes how Energy flows through an ecosystem

• Describes how Food flows through an ecosystem

• Consumers going into other consumers
• Who eats who

Multiple Choice

According to the image, what is the primary consumer in the food chain?

• plant

• insect

• mouse

• snake

Fill in the Blank

Explain what is happening at each level of this energy pyramid. What groups of organisms would you find in each level? How much energy would they have?

,

,

,

&

.

%

%

.

Multiple Choice

What trophic level is the PRIMARY consumer?

• 1st

• 2nd

• 3rd

• 4th

Open Ended

Find an organism that exists at two different trophic levels.

Open Ended

What is the producer in this food web?

Open Ended

Which organisms of PRIMARY CONSUMERS in this food web?

Open Ended

Which organisms might be occupying similar niches? (look for organisms that have similar energy sources, predators and habitats)

Open Ended

How might this ecosystem be affected if the owl population DECREASED?