Parallel venation is found in _____.
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Which of the following is a greenhouse gas or a gas which can deplete the ozone layer?
Which of the following is used in gunpowder?
What is the percentage of methane in biogas?
Carcinogenic chemicals cause
What is the name of a group of similar cells performing a specific function?
Nephron is related to which of the following system of human body?
Soft drinks contain: