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What word do we use to describe a species which has no members still living?

• endangered
• extinct

the group of food chains connected with each other

• food chain

• food web

• ecosystem

• none

food chain : owl - snack - frog - locust - plant

what happen to the frog in absence of snakes?

• the number of frogs will increase

• the number of frogs will decrease

• the number of frogs will be constant

• none

_________ is from endangered birds.

• ibis bird

• dodo bird

• archaeopteryx

• none

__________ is an example of endangered plants in Egypt which is used by pharaohs in manufacturing

• ferns

• mosses

• papyrus plant

• none

______________ is from recently extinct mammals

• dodo bird

• mammoth

• dinosaur

• quagga

_________ indicate(s) extinction

• Evolution

• Protectorates

• Fossils

• Ecological equilibrium

Ras Mohamed protectorate established to protect :

• coral reefs

• colored fish

• ibis bird

• coral reefs and colored fishes

........... is the process of replacing the wood material of trees by silica,

• trace

• cast

• mold

• petrification

Algae appeared before _____________and ____________

• mosses and coral

• mosses and ferns

• ferns

• coral and gymnosperms