How many facial bones are there?
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Fishes have a ........ chambered heart.
In females, the ovaries are located ______ on each side of the lower abdomen.
In each testes in a male reproductive system, there are ________ compartments called testicular lobules.
Hepatitis affects which organ of the human body?
Which one of the following is a water soluble vitamin?
The shape of the outer part of the ear is like a __________.
For the aquatic organisms, the source of food is