Explain how the mycorrhizae and plant root interaction is considered symbiotic.

Charophytes are filamentous green algae. An example is Chara. Chara is hypothesized to be the common ancestor of terrestrial plants.

(3 points for the correct answer. 1 bonus point if you have answered the questions 1 through 3 correctly.) Given that the functions  and  are solutions of the differential equation         

The general solution of

The general solution of

The general solution of  is

Consider the initial value problem 

What are the two general structures that make up a virus? 

The general solution of  is 

(3 points for the correct answer. 1 bonus point if you have answered the questions 1 through 3 correctly.) Given that the functions and  are solutions of the differential equation