Why do bears hibernate

What adaptations allows a polar bear to survive in its environment?

What is a food web?

Which are examples of abiotic factors of an ecosystem?

What are primary consumers?

How much energy is transferred at each tropic level?

The organisms below are all decomposers except

Temperatures are similar all year; very humid; great variety of organisms; hot and wet

Seasons are different; summers are very hot; dry year around

Warm year round with some water, dominant plant is grass

Permafrost prevents roots of trees from growing; short growing season; only small plants

Snow in winter; rain in summer; evergreen trees; often in high altitudes

Largest biome; photic and aphotic zones; home of coral reefs

Seasons are different; trees lose leaves in cold; may have some coniferous trees

Less than 2% of earth; not salty; can be standing or flowing

Which of these are a limiting factor in an ecosystem

Which of the following is correctly arranged from lowest to highest trophic level?

What is the ultimate source of energy in food chains

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