The environmental change that occurs faster is definitely volcanic eruption.
The DNA region probably codes for molecules related to muscle function.
Answer:
b. They cannot reproduce outside of a host cell.
Explanation:
Viruses are <em>parasitic organisms</em> that need a<em> host</em> in order to<u> thrive</u> and <u>reproduce</u>. This means that they cannot replicate outside of a host cell, but can only do this by parasitizing it. They have to find a host cell in order to continue their life-cycle or else they won't thrive. The word "obligate" means <em>being restricted to a specific mode or function in life</em>. This shows that the virus has a restriction when it comes to <u><em>reproduction.</em></u> It cannot reproduce without finding a host cell.
Answer:
Option (A) is the correct answer.
Explanation: Ionic bonds are the bonds that are formed by transfer of electrons from one atom to another. ... Thus, we can conclude that one atom pulls an electron from another atom best describes how an ionic bond forms.