Which one of the following is correct ?

Read the following five statements (A to E) and select
the option with all correct statements :-

(A) Mosses and Lichens are the first organisms to
colonise a bare rock.
(B) Selaginella is a homosporous pteridophyte
(C) Coralloid roots in Cycas have VAM
(D) Main plant body in bryophytes is gametophytic,
whereas in pteridophytes it is sporophytic
(E) In gymnosperms, male and female gametophytes
are present within sporangia located on
sporophyte

Cytochromes are found in :-

In Bt cotton, the Bt toxin present in plant tissue as
pro-toxin is converted into active toxin due to :-

In sea urchin DNA, which is double stranded, 17%
of the bases were shown to be cytosine. The
percentages of the other three bases expected to
be present in this DNA are :-

Which of the following statements is not correct?