Ecology

A pod of dolphins hunting and feeding on a school of fish is an example of

• an ecosystem interaction.
• a population interaction.
• a community interaction.
• a biome interaction.

Tags

NGSS.HS-LS2-6

What is the ultimate source of energy for all ecosystems?

• the Sun
• plants
• secondary consumers
• primary consumers

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

The energy pyramid below shows a possible amount of energy, in kilocalories, available in the organisms at each trophic level in an ecosystem.  According to the law of conservation of energy, energy can neither be created nor destroyed.  If this is true, why is there less energy in the top of the energy pyramid than there is in the bottom of the energy pyramid?

• Energy is lost between each trophic level as heat.
• The law of conservation of energy does not apply to ecosystems.
• Organisms in the top of the energy pyramid use up energy the fastest.
• The extra energy in the bottom is slower to reach the top.

Tags

NGSS.MS-LS2-3

Which of the following interactions is an example of symbiosis?

• an insect acts as a pollinator for a plant species
• a population of hummingbirds migrates during the summer
• a tropical bird performs a courtship dance for a mate
• a mother bear feeds and protects her cubs

Tags

NGSS.MS-LS2-2

A __________ is a group of organisms that can reproduce fertile offspring.  Failure to reproduce fertile offspring will cause __________ of the group.

• genus, evolution
• species, extinction
• phylum, extinction
• species, evolution

Tags

NGSS.MS-LS3-2

NGSS.MS-LS4-4

The graph below shows population data for two species.  What can be said about the relationship between species 1 and species 2?

• When the population of species 1 increases, the population of species 2 decreases.
• The population of species 1 and species 2 stay the same over the time period shown.
• The population of species 1 is not influenced by the population of species 2.
• When the population of species 1 increases, the population of species 2 increases.

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

Grazing cows disturb the grass and cause insects to fly around the cows as they eat. In turn, birds swoop in and eat the insects. What type of symbiosis occurs between cows and birds?

• commensalism.

• mutualism.

• parasitism.

• predation.

Tags

NGSS.MS-LS2-2

In a simple food chain, small fish eat algae; bigger fish eat the smaller fish; bears eat the bigger fish. 
Using the above scenario, which of these would have the largest amount of energy?

• algae
• bears
• big fish
• small fish

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

The animals that live in this valley have basic needs to survive. ALL BUT one of these non-living features is a basic need of the animals living here.

• food.
• oxygen.
• shelter.
• carbon dioxide.

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

In the organization of living things, a ______________ would include the largest number of organisms.

• community

• population

• ecosystem

• species