Is the third clear eyelid an extension of the upper eyelid on a frog?
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a large opening at the front of the head end of the frog. It has both upper and lower jaws. protrude from the head just back of the nostrils. Note theupper and lower eyelids on each eyeand if possible observe the third clear eyelid that can extend from the lowereyelid to cover and protect the eye
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