Populations in Ecosystems

Look at each picture carefully. Decide if the picture shows a population or a community.

The deer in the forest.

• Population

• Community

Tags

NGSS.MS-LS2-1

"a randomly selected square plot marked in an ecosystem. Organisms are counted, and the average number in each plot is taken, then an estimate of population can be calculated" Name this population counting method.

• Capture-Recapture

• Quadrats

• Averaging

• Random selection

animals are captured and marked before being released. Several days later, animals are captured again before an estimate of population is calculated. Name this population counting method

• Quadrats

• Random selection

• Capture-Recapture

• Averaging

Which of the following accurately describes the difference between capture-recapture and quadrat sampling?

• Quadrat sampling is used for mobile populations and capture-recapture is used for stationary populations

• Quadrat sampling is used for stationary populations and capture-recapture is used for mobile populations

• Quadrat sampling can only be used for small populations

• Capture-recapture sampling can only be used for small populations

If I wanted to know how many blades of grass are inside the track, which sampling method could I use?

• count every blade of grass

• Mark a random number of blades of grass, return two days later and recapture the blades

• Divide the grassy area into 1 inch sections, randomly pick several sections to count, average them together and multiply that by the total square inches.

Tags

NGSS.MS-LS2-1

A scientist would look at a group of rabbits that live in a meadow and call them a _____________.

• succession

• population

• community

• habitat

What year is the zebra population the highest?

• 1920

• 2000

• 1960

• 2020

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

All of the populations that live in one area together

• limiting factors

• populations

• community

• speed limit

In which type of symbiosis does one benefit and one is harmed?

• Symbiosis 

• Mutualism

• Parasitism

• Commensalism

Most ecosystems have many food chains. What are food chains that overlap in an ecosystem and show feeding relationships? 

• unhealthy

• energy pyramid 

• food web

• matter

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-3