Unit 1: The Living World-Ecosystems

A naturally occurring unit of organisms and their physical environment is called:

• a biotic environment

• a population

• a community

• an ecosystem

Which statement is true of a mutualistic relationship:

• one species benefits and one is unharmed

• one species benefits and one is harmed

• both species benefit

• both species are harmed

Direct competition for a finite resource is called:

• contest competition

• interspecific competition

• scramble competition

• territoriality

The graph plots changes in numbers of a woolly aphid population and a ladybug population. The relationship between these species is:

• The two species compete for a shared resource

• ladybugs are predators of aphids

• aphids are predators of ladybugs

• aphids depend on ladybugs for their survival

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-1

NGSS.MS-LS2-4

In an ecological interaction, commensalism can be represented as:

• + -

• - -

• + 0

• + +

Which of the following processes returns nitrogen to the atmosphere:

• Nitrogen fixation by Rhizobia

• Ammonification

• Denitrification

• Nitrification

Atmospheric circulation moves heat:

• From the poles to the equator

• Across mid latitudes

• From the equator to the poles

• From the Northern to the Southern Hemisphere

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NGSS.MS-ESS2-6

The four general climate-defined regions in each hemisphere are:

• Polar, temperate, desert, tropical

• Polar, cool temperate, warm temperate, equatorial

• cool temperate, warm temperate, tropical, desert

• polar, temperate, tropical, subtropical

Tags

NGSS.MS-ESS2-6

Which of the following terrestrial biomes is found in equatorial latitudes with plentiful rainfall:

• Taiga

• Savanna

• Tropical rainforest

• Temperate rainforest

The graph plots the number of redshanks (a wading bird) against its amphipod prey. The curve has been fitted to data (blue triangles). Which statement described the behavior of this predator:

• Redshanks feed faster at high prey densities

• Redshanks don't feed at prey densities >3000/m2

• Redshanks are more dispersed in the environment when prey density is high

• Redshanks aggregate to exploit patches of higher prey density

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-1