Nostoc fixes dinitrogen in symbiotic association with the following :
I. Alnus
II. Gunnera
III. Anthoceros
IV. Casuarina
The correct combination is :

Pollination in pine trees is facilitated by

Which of the following taxa shows zooidogamous oogamy?
(I) Spirogyra
(II) Funaria
(III) Pteris
(IV) Cycas
The correct answer is :

Match items in Column I with those in Column II

Select the wrong statement:

Read the following statements (A-E) and answer the question which follows them
(A) In liverworts, mosses, and ferns gametophytes are free-living
(B) Gymnosperms and some ferns are heterosporous
(C) Sexual reproduction in Fucus, Volvox and Albugo is oogamous
(D) The sporophyte in liverworts is more elaborate than that in mosses
(E) Both, Pinus and Marchantia are dioecious
How many of the above statements are correct?

Isogamous condition with non-flagellated gametes is found in

Two adjacent filaments of Spirogyra affinis each 10 cells participating in reproduction. How many new Spirogyra plants are produced during sexual reproduction?

Which one pair of examples will correctly represent the grouping Spermatophyta according to one of the schemes of classifying plants:

Which one of the following pairs is wrongly matched while the remaining three are correct?