Unit Test Review Answers Which important event in Earth’s history occurred during the Jurassic period?

The first birds emerged on Earth.
Mammals were in search of food.
Animals with shells emerged on Earth
Treelike ferns first began to grow and populate.
Answer is The first birds emerged on Earth.

answer; ///(b) it is composed of four protein chains and four heme groups;

answer: grassland biomes are closer to the equator and receive more rain.

grasslands are biomes that are dominated by grasses rather shrubs and trees. savanna are biomes that exhibit grasses, shrubs and small tree as vegetation. grasslands are located near the equator of the earth. these are found in north america. savanna biomes are found in africa, south america, australia and india. grassland exhibit moderate climatic conditions, it receives   amount of rainfall higher than savanna.   therefore, savanna exhibit dry and hot climatic conditions.

b. climate change will cause an increase in biodiversity of all ecosystems.

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