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100

What nutritional relationship involves one animal hunting another animal for food? 

Predation 

100

Gliding within an updraft to gain altitude is?

soaring 

100

The main tissue of a tree trunk is the?

wood 

100

Together all living things in a ecosystem are the?

community 

200

What is a classification that describes an organism feeding relationship with other organisms? 

trophic level 

200

The organelles of plant cells in which photosynthesis occurs are 

chloroplast 

200

An organisms that feeds on dead and decaying organic matter is 

saprophyte 

200

All the organisms of one species in a ecosystem is 

population 

300

What group of drugs includes morphine and heroin?

opioids 

300

What is the early growth of a seed called? 

germination 

300

What are the air sacs in a persons lungs called? 

alveoli 

300

What are the largest group of mammals?

rodents 

400

hot humid region near the equator 

Tropical Forest 

400

What has no trees because the growing season is too short ?

Tundra 

400

What is the dominant plant species in a biome called? 

climax vegetation 

400

What is the number and variety of species in an environment called?

biodiversity 

500

An environment and all its organisms form a?

ecosystem

500

The group of algae that includes volvox is the 

green algae 

500

What is the changing of an immature hatchling into an adult called?

metamorphosis 

500

What is the scientific term for the feelers on an insects head?

antennae 

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