2.5 Investigating Ecosystems

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2.5 Investigating Ecosystems - Abiotic

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11. Which of the following correctly describes the components of a population, community, ecosystem and habitat, respectively? *

Population_________Community_________Ecosystem_________Habitat

1 point

Biotic only______Biotic only________Biotic & abiotic_______Biotic & abiotic

Biotic only______Biotic & abiotic_____Biotic & abiotic_______Biotic & abiotic

Biotic & abiotic__Biotic & abiotic_____Biotic only__________Abiotic only

Biotic only______Biotic only________Biotic & abiotic_______Abiotic only

63. Which combination of abiotic factors is typical of the tropical forest biome? *

1 point

Low insolation and high rainfall

Wide range of temperatures and high rainfall

Narrow range of temperatures and high rainfall

High insolation and low rainfall

74. Which list contains only abiotic components of an ecosystem? *

1 point

air, water, rock

air, producers, climate

soil, consumers, water

carnivores, herbivores, decomposers

116. Which of the following is an abiotic factor that might affect the food web below? *

1 point

Presence of parasites

Spread of diseases in frogs

Increase in temperature

Introduction of new plant species

119. An experiment on photosynthesis at two different temperatures using one species of plant, produced the results graphed below. *

Which statement is correct?

1 point

At 35°C photosynthesis is slower than at 20°C.

The rate of photosynthesis is always greater at 35°C.

At 20°C the rate of photosynthesis is independent of light intensity.

At low light intensity temperature does not affect the rate of photosynthesis.

126. Which list includes three abiotic factors that affect aquatic plants? *

1 point

number of decomposers, pH of water, day length

water temperature, oxygen concentration, light intensity

carbon dioxide concentration, number of primary consumers, wavelength of light

water temperature, number of secondary consumers, carbon dioxide concentration

143. Which statement is correct? *

1 point

Secondary consumers can be abiotic or biotic components of ecosystems.

Temperature, soil pH and decomposers are abiotic components of soil ecosystems.

Primary consumers are always biotic components of ecosystems.

Bacteria, turbidity and plankton are biotic components of marine ecosystems.

159. Which list contains only abiotic factors in a marine environment? *

1 point

algae, temperature and nitrogen level

salinity, turbidity and plankton

decomposers, carbon dioxide and calcium level

pH, dissolved oxygen and light intensity

161. Which of the following is a list of abiotic factors that affect the distribution of organisms? *

1 point

Sunlight, decomposers and soil pH

Temperature, sunlight and soil pH

Water, sunlight and competition

Disease, pH and dissolved oxygen

171. Which statement is correct? *

1 point

All ecosystems have both biotic and abiotic components.

Some ecosystems only have biotic components.

Some ecosystems only have abiotic components.

Producers (autotrophs) are biotic components and consumers (heterotrophs) are abiotic components of ecosystems.

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