The answer to ur question is A
Answer:
The purpose of the outer covering of the bird helps keep it warm and to help it fly, whilst the outer cover of the tree is to protect it from bugs.
Explanation:
Cell theory was fdiscovered in the 17th century. but the first. cell theory was credited in the 19th century.
All viruses<span> contain the following </span>two components<span>: 1) a nucleic acid genome and 2) a protein capsid that covers the genome. Together this is called the nucleocapsid.</span>
D. Water is polar-convalently bonded, not by van der Waal forces.
