Biology Ecosystems

All of the grasses, deer, birds, wolves, rocks and weather in an area create what?

• an organism

• a population

• a community

• an ecosystem

Which of the following correctly orders the levels of organization of an ecosystem from simplest to most complex?

• individual, population, community, ecosystem

• individual, community, population, ecosystem

• ecosystem, community, population, individual

• community, population, individual, ecosystem

Which of the following is an aquatic habitat?

• desert

• tropical rainforest

• frozen Arctic

• coral reef

Tags

NGSS.MS-ESS2-4

Which of the following is an abiotic factor of an ecosystem?

• trees

• grasses

• temperature

• flowering plants

Tags

NGSS.MS-LS2-3

Which sphere of the Earth includes all living organisms?

• Atmosphere

• Hydrosphere

• Biosphere

• Geosphere

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-4

NGSS.MS-LS2-3

The following statement is a hypothesis formed about marsh grass: 
If the amount of nitrogen marsh grass receives is increased, then the height of the grass will increase, because nitrogen is an essential nutrient needed for marsh grass to grow.
What is the independent variable of the statement above? 

• Height of grass

• Amount of nitrogen

• Essential nutrient

• Amount of growth

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Blackspot fungus does not grow on roses when there is a large amount of sulfur dioxide in the atmosphere. This fungus serves as a _____

• secondary messenger

• bioindicator

• keystone species

• eco-service

Tags

NGSS.MS-LS1-5

What is the role of decomposers in an Ecosystem? 

• They recycle matter and nutrients to form fossil fuels

• They are burn and release as carbon dioxide

• Decomposers are responsible to turn oxygen into carbon dioxide

• They recycle energy back to the sun

Tags

NGSS.MS-LS2-3

An autotroph is also called a ______.

• Consumer

• Producer

• Decomposer

• Heterotroph

What percent of the Sun's radiant energy is used for photosynthesis?

• less than 1%

• 30%

• 50%

• 70%

Tags

NGSS.MS-LS1-6