What was thprobablsourcof gases constituting thearly atmosphere?
A) other planets orbiting the sun but close enough to the early earth
B) meteorites
C) volcanoes
D) stromatolites
E) comets
Correct Answer:
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Q5: Worldwide, about _ million peoplarinfectewith HIV.
A)9
B)19
C)29
D)39
E)49
Q6: Oxygen gas is unlikely to havparticipatein thorigin
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
Q11: Scientific evidences suggest that oxygen gas appeareon
Q12: Which of thfollowing diseases has been eradicatefrothUnites
Q13: HIV may affect
A)the human reproductive system.
B)the human
Q14: Which of thfollowing components was NOT part
Q15: According to scientific evidences, many organic compounds
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