Which of the following is NOT a natural source of energy?...
Which of the following is NOT a natural source of energy?
coal
electricity
food
sun
water
Correct answer is B
No explanation has been provided for this answer.
Which of the following is not associated with excretion in mammals ...
Digestive enzymes are responsible for ...
The part of the cell that is responsible for the production of energy is ...
The best time to pluck the leaf for the experiment is ...
At what stage in the life history of a mammal is the sex of an individual set? ...
Which of the following actions does not occur during exhalation in man? ...
Which of these is an example of physiological variation? ...
Monotremes are unique mammals because they ...