The physical characteristics of influenza viruses are that they are single-stranded, RNA viruses enclosed in a helical nucleocapsid. On the outside, these viruses are enveloped. Two important proteins are found on surface of this envelope: hemagglutinin and neurominidase.
It protects earths surface from dangerous radiation. Your answer is A
Answer:
by pumping blood and oxygen to the working muscles.
Explanation:
The circulatory system helps the muscular system by pumping blood and oxygen to the working muscles. The circulatory system also helps the muscular system because it allows muscles to receive the oxygen they need to function properly.
Answer:
weather is whats going on in the atmosphere pff
Explanation:
They are used for them to adapt to the environment