Environmental Science The earth's first atmosphere was composed primarily of: Hydrogen and helium Argon and nitrogen Oxygen and water vapor Carbon dioxide and water vapor Hydrogen and helium Argon and nitrogen Oxygen and water vapor Carbon dioxide and water vapor ANSWER DOWNLOAD EXAMIANS APP
Environmental Science Water used for paper mills should not contain iron magnesium sodium chlorine iron magnesium sodium chlorine ANSWER DOWNLOAD EXAMIANS APP
Environmental Science The pioneers in xerach succession is the shrubs mosses crustose lichen foliose lichen shrubs mosses crustose lichen foliose lichen ANSWER DOWNLOAD EXAMIANS APP
Environmental Science Blue whale is placed under Extinct Endangered Rare Critically endangered Extinct Endangered Rare Critically endangered ANSWER DOWNLOAD EXAMIANS APP
Environmental Science Sulphur bacteria are examples of Heterotrophs Saprophytes Carnivores Autotrophs Heterotrophs Saprophytes Carnivores Autotrophs ANSWER DOWNLOAD EXAMIANS APP
Environmental Science Unleaded petrol contains __________ which are known as carcinogenic compounds nitrates sulphates benzene phosphates nitrates sulphates benzene phosphates ANSWER DOWNLOAD EXAMIANS APP
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