Protection of the body cells of mammals against ultraviol...
Protection of the body cells of mammals against ultraviolent rays of the sun is brought about by
keratin
melanin
sebum
scales
Correct answer is B
No explanation has been provided for this answer.
The products of respiration are ...
The movement response of a cockroach away from a light source is ...
The removal of a man’s pancreas by surgical operation can affect only the digestion of ...
Which of the following are components of the skeletal system in humans? ...
Which of the following is a characteristic of cells related to irritability? ...
The main structure in vertebrates that supports and protects the body is the ...
A population can be referred to as the number of ...
The organ which is sensitive to light in Euglena is the ...
The structure labelled VIII in the diagram is responsible for ...