Oxygen gas is unlikely to havparticipatein thorigin of lifon earth becausoxygen gas is
A) reactive.
B) proactive.
C) interactive
D) hyperactive.
E) unreactive.
Correct Answer:
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Q1: Thhuman immunodeficiency virus may infect
A)sperm cells.
B)white blood
Q2: Which of thfollowing statements is NOT correct
Q3: Until which perioof timdiscientists think that molecules
Q4: Which of thfollowing organisms causmalaria?
A)butterflies
B)mosquitoes
C)flies
D)wasps
E)Plasmodium
Q5: Worldwide, about _ million peoplarinfectewith HIV.
A)9
B)19
C)29
D)39
E)49
Q7: Plasmodiuis likely to destroy
A)sperm cells.
B)white blood cells.
C)purple
Q8: Which of thfollowing organisms arvectors of malaria?
A)butterflies
B)mosquitoes
C)flies
D)wasps
E)Plasmodium
Q9: Which of thfollowing elements is (are) likely
Q10: What was thprobablsourcof gases constituting thearly atmosphere?
A)other
Q11: Scientific evidences suggest that oxygen gas appeareon
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