Scientific evidences suggest that oxygen gas appeareon earth about __________ years ago.
A) 38,000,000,000
B) 25,000,000,000
C) 2,300,000,000
D) 380,000,000
E) 4,500,000
Correct Answer:
Verified
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
Q10: What was thprobablsourcof gases constituting thearly atmosphere?
A)other
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
Q16: Malaria is still common in which of
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