Which of the following structures is used for respiration...
Which of the following structures is used for respiration in insects?
Lungs
Thorax
Cuticle
Spiracles
Correct answer is D
No explanation has been provided for this answer.
When a person’s urine contains a high concentration of urea, it could be the result of ...
Carbon dioxide enters the leaf through the structure labelled ...
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Which of the following forms of variation will give a normal distribution? ...
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