prep 2 , unit 3 , lesson 2 part 1

is the continous decrease in number of the same species of living organisms without compensation until all members of species die out.

• Food chain

• Extinction

• Food web

• Evolution

indicate(s) extinction.

• Fossils

• Protectorates

• Evolution

• Ecological equilibrium

All the following are from the hypothetical theories that explain the causes of macro extinction except..........

• meteorite impacts with Earth.

• poisonous gases emitted by volcanoes.

• occurrence of long glacial age.

• overhunting.

is/are of the most important causes of extinction in recent ages.

• Volcanic eruption

• Falling of ice bergs

• Falling of meteorites

• Overhunting and environmental pollution

All of the following are natural disasters that threaten living organisms except...........

• floods.

• volcanoes.

• Drought waves

• Global warming

were famous extinct animals in old

• Dodo bird and mammoth

• Dinosaurs and quagga

• Dinosaurs and mammoth

• Grey bear and passenger pigeon

From the most common recently extinct species is/are...............

• bald eagle only.

• dodo bird only.

• quagga only.

• dodo bird and quagga.

is considered the midway between horse and zebra.

• Quagga

• Dodo bird

• Golden frog

• Tasmanian cat

is an extinct bird, which was characterized by the reduced size of its wings.

• Passenger pigeon

• Dodo bird

• Bald eagle

• Ibis bird

All of the following are endangered species except..............

• Panda bear

• Bald eagle

• Quagga

• Rhinoceros