Ecosystem review

Which of the following ways are immigration and birth rates similar in regards to a populations growth rate?

• Both immigration and births add individuals to a population

• neither immigration no births occur when a population has reached it's carrying capacity

• neither immigration no births occur if a population has limiting factors

• Both immigration and births subtract individuals from a population

What is the term for a symbiotic relationship in which both participating species benefit?

• Parasitism

• beneficialism

• commensalism

• mutualism

Which one of these areas was most likely to survive the dust-bowl intact?

• Areas in which crops had been planted

• Areas in which trees had been harvested

• areas in which farmers had kept the soil well plowed

• areas in which the native prairie had been left undistrubed

Which is an example of a commensalistic relationship?

• When sharks consume prey, remoras fee on the scraps that scatter in the water

• Fleas live on the surface of dogs and feed on nutrients in the blood of the dog

• Hummingbirds help pollinate plants when the feed on nectar found within their flowers

• Spiders spin webs in which they capture gnats and they consume

Which of the following are biotic components often found in a deciduous forest biome?

• African elephants, Giraffes, grass

• Very wet, poor soil

• deep, maple trees, lichen

• Moderate rainfall, cool and warm seasons.

How are biotic factors different from abiotic factors in an environment?

• Biotic factors are living; Abiotic factors are not

• Biotic factors are found everywhere; abiotic are not

• Biotic factors are animals; abiotic are plants

• biotic factors do not require water; abiotic do

Tropical rain forests have more kinds of plants and animals than any other land biome. Which of the following is a biotic factor in a tropical rain forest

• A community of decomposers

• The region's air quality

• The average amount of rainfall

• A stream running through the forest

Parasitism is the act of one organism feeding on and usually living on or in another, typically larger organism. The feeding organism is called a parasite. What is the term describing the organisms that is being fed upon in parasitism?

• The host

• the prey

• the partner organism

• the provider

Which is a biotic factor within an ecosystem?

• The space an animal has to live

• The amount of sunlight a plant receives

• the amount of oxygen in the air

• carnivores that consume other animals

Which of the following terms describes the process of one organism killing another organism in order to obtain food?

• Symbiosis

• Secondary trophism

• Predation

• coevolution