eQuizShow

8th Gr Ecology Test Review

Relationships

Question:

Coral protect algae and feed from their products. Which type of symbiotic relationship is this an example of?

Answer:

Mutualism

Question: Certain whales eat zooplankton. Zooplankton eat phytoplankton. Because these whales eat zooplankton, the whales are classified as __________.
Answer: Predators

Question: A manatee is a marine herbivore. If manatees became extinct, what would be the most likely result?

A. Biodiversity would not be affected

B. Certain producers would increase

C. Other manatees would move in and restore the population

D. Predators would occupy higher trophic levels

Answer: B. Certain producers would increase

Question: How do producers and consumers depend on each other?
Answer: Producers obtain carbon dioxide from consumers, and consumers obtain oxygen and food from producers

Question: Snowy owls eat lemmings, a small, furry mammal. If the population of lemmings increases, what would the effect be on the snowy owl?
Answer: Their numbers would increase, also.

Food Webs

Question: Otters have adaptive traits that allow them to eat shellfish. If changes in the ecosystem cause a reduction in the numbers of shellfish, the otters will most likely

A. experience a population decline

B. change the genetic makeup of their bodies

C. increase reproduction rates

D. adapt to a different ecosystem

Answer: A. experience a population decline

Question: Which are the abiotic factors:

grasses, rocks, soil, insects, weather, reptiles, bacteria

Answer: rocks, soil, weather

Question: What will likely happen if different species compete for the same resource?

A. they will develop different requirement

B. one species may adapt

C. one species will be eliminated

D. they will change the environment so they can both survive

Answer: C. one species will be eliminated

Question: The arrows in a food web show the direction of
Answer: energy flow

Question: How would a more sustainable food web look compared to a less sustainable food web?
Answer: The more sustainable food web will have more branching. The less sustainable food web will have fewer different organisms at each trophic level.

Adaptations

Question:

Earthworms are raised in wooden boxes filled with soil. What other factors are most important for the survival of the earthworms?

A. color and length of the earthworms

B. temperature and moisture of the soil

C. air pressure and wind

D. size and color of the boxes

Answer:

B. temperature and moisture of the soil

Question: Peppered moths were light colored before the Industrial Revolution in England. After the Industrial Revolution, the moths were dark colored. Then, after the Clean Air Act was passed, there were more light colored moths. Which statement is true?

A. the trait for dark color contributed to survival during times of less pollution

B. the trait for light color contributed to survival during times of great pollution

C. color variation has no effect on survival rates of the moths

D. a trait may be favorable in one environment, but not another

Answer: D. a trait may be favorable in one environment, but not another

Question: Certain trees in a forest grow extremely tall. They are likely competing for which abiotic factor?
Answer: sunlight

Question: A species of wild sheep used to be large because they gained a lot of weight during the summers to survive harsh winter conditions. Climate change has caused grass to become available during more of the winter months now, and researchers have noticed a decrease in she wild sheep's ______

A. life expectancy

B. size

C. reproduction rates

D. body temperatures

Answer: B. size

Question: Which would be in greatest danger of becoming extinct?

A. a population with few variations in a stable environment

B. a population with few variations in an unstable environment

C. a population with many variations in a stable environment

D. a population with many variation in an unstable environment

Answer: B. a population with few variations in an unstable environment

Oceans

Question: How do artificial reefs affect marine ecosystems?
Answer: artificial reefs provide new habitat for organisms

Question: How is solid waste (plastic) harmful to ocean ecosystems?

A. plants can be poisoned

B. solid waste can dissolve in water

C. solid waste can fill in ocean trenches

D. animals can become entangled in solid waste

Answer: D. animals can become entangled in solid waste

Question: Coral animals are very sensitive to changes in their environment. Some sewage treatment plants discharge hot, nutrient-rich overflow directly into the ocean. How would this likely affect coral reefs?

A. harms because it drives away fish

B. harms because water changes temperature

C. helps because coral uses extra nutrients

D. helps because the extra water is needed to maintain the coastline

Answer: B. harms because water changes temperature

Question: Oceans and algae provide everything except

A. large amounts of carbon dioxide

B. transportation of materials

C. resources including food, medicines, and salt

D. >50% of the oxygen on our planet

Answer: A. large amounts of carbon dioxide

Question: What is the likely cause of the loss of 90% of large predators in the ocean ecosystems?
Answer: overfishing

Wildcard

Question:

Where are the valence electrons located?

Answer:

Question:

In what positions do the Earth, Moon, and Sun needs to be for neap tides?

Answer:

At right angles to each other

Question:

What is commensalism?

Answer:

One organism benefits, the other is not affected

Question:

How much energy moves up from one trophic level to the next?

Answer:

10%

Question: What determines an atom's chemical characteristics?
Answer: the valence electrons