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kuttin kuttin
wrote...
2 years ago

Question 1.

The exoskeleton of all insects is covered by ________.

▸ a cholesterol-rich layer of membrane

▸ a barrier of hairs

▸ a lubricating layer of oils

▸ a protective coating of wax

▸ a complex system of scales

Question 2.

Birds have a layer of wax on their ________, making them water repellant.

▸ legs

▸ eyes

▸ feathers

▸ ears

▸ skin
Textbook 
Organic Chemistry

Organic Chemistry


Edition: 4th
Author:
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bodie1980bodie1980
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Posts: 170
Rep: 1 0
2 years ago
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