Ecology

Members of a species in a defined area

• Ecosystem
• community
• biodiversity
• population

Which of the following leads to a decrease in biodiversity?

• protection of ecosystems
• pollution control
• selective cutting
• introduction of exotic or invasive species

Tags

NGSS.MS-LS2-4

Non-living factor that affects an ecosystem

• biotic factor
• abiotic factor
• food chain 
• biome

Tags

NGSS.MS-LS2-3

In the wild, some alligators gets their teeth cleaned by birds. The birds gets their food from the alligators' teeth.

What type of symbiosis is this?

• Mutualism

• Commensalism

• Parasitism

• Neutralism

Tags

NGSS.MS-LS2-2

In an ecosystem, there are populations of moose, rabbits, grass, and pine trees. Suddenly, a fire blazes through the area, which kills all of the populations. As the months go on, new species of grass begin to take root. This attracts animals, and eventually the ecosystem is restored.

What type of ecological succession happened?

• Primary succession

• Secondary succession

• Tertiary succession

• None of the above

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

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-LS2-1

NGSS.MS-LS2-4

Which limiting factor would increase due to the number of individuals in a population?

• Unusual weather
• Natural disaster
• Births
• Disease

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Marine ecosystem that connects a river with the ocean

• estuary

• salt marsh

• mangrove swamp

• coral reef

Tags

NGSS.MS-LS2-2

Salinity refers to

• how many plants are in the water

• how many organisms live in the water

• how much salt in is water

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

The bottom region of oceans and bodies of fresh water is 

• Benthos
• Benthic Zone
• Limnetic Zone
• Nekton