Unit 11 Ecology Quiz 2: Photosynthesis and Ecology

Question 1

Short answer

Which of the options below are examples of autotrophs (there could be more than one)
- killer whales
- mosquitoes 
- grasshoppers
- snails
- seals			
- algae
- oak trees

Question 2

Short answer

Identify a decomposer in the food web below. Explain their role in a natural ecosystem.

Source 2.1

Question 3

Short answer

Identify an organism in the food web below that consumes snails.

Source 3.1

Question 4

Short answer

If the bass population in the food web below were to decrease due to disease, what would be the effect on the amphipod population? Explain.

Source 4.1

Question 5

Short answer

Which example below explains why the snail and pickerel can exist in the same ecosystem?

Source 5.1

Example 1: The snail population and pickerel population both consume diving beetles.

Example 2: The snail populations are heterotrophs and the pickerel are autotrophs.

Example 3: The snail and the pickerel occupy different niches, as the snail consumes algae and the pickerel consumes diving beetles.

Example 4: The snail population and pickerel population can actually not coexist due to food chain homeostasis.

Question 6

Short answer

Based on the information in the diagram, only some of the available energy is transferred from one energy level to the next. Explain what happens to the rest of the energy.

Source 6.1

Question 7

Short answer

Which of the species from the pyramid would have the most biomass?
- hawk
- snake
- rabbit	
- grass

Source 7.1

Question 8

Short answer

Which of the species in the diagram would have the most toxins?

Source 8.1

Question 9

Short answer

The protozoa that feed on the bacteria can best be described as which type of niche listed below?
- Producers		- Herbivores		- Parasites		- Heterotrophs

Source 9.1

Thirty grams of hay (dried grasses) were boiled in 500 milliliters of water, placed in a culture dish, and allowed to stand. The next day, a small sample of pond water was added to the mixture of boiled hay and water. The dish was then covered and its contents observed regularly. Bacteria fed on the nutrients from the boiled hay.  As the populations of bacteria increased rapidly, the clear mixture soon became cloudy. One week later, microscopic examination of samples from the culture showed various types of protozoa (single-celled organisms) eating the bacteria.

Question 10

Short answer

Create a food chain to represent the transfer of energy in the ecosystem from the text.

Source 10.1

Thirty grams of hay (dried grasses) were boiled in 500 milliliters of water, placed in a culture dish, and allowed to stand. The next day, a small sample of pond water was added to the mixture of boiled hay and water. The dish was then covered and its contents observed regularly. Bacteria fed on the nutrients from the boiled hay.  As the populations of bacteria increased rapidly, the clear mixture soon became cloudy. One week later, microscopic examination of samples from the culture showed various types of protozoa (single-celled organisms) eating the bacteria.

Use this format: [organism 1] -> [organism 2] -> [organism 3]

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