PTERIDOPHYTES AND GYMNOSPERMS

Which of the following plants show heterospory

• Salvinia

• Isoetes

• Selaginella

• All of the above

Which of the following plant is homosporous

• Fucus

• Funaria

• Lycopodium

• All of the above

One of the major difference between bryophytes and pteridophytes

• With respect to water conduction system

• With respect to dominance of sporophyte

• With respect to root stem and leaf

• All of the above

Which of these is HAPLOID?

• Gametophyte

• Sporophyte

This is a picture of a fern. What generation is it?

*Image by Jon Houseman

• Sporophyte

• Gametophyte

Heterospory is a precursor to the evolution of _____.

• Vascular systems

• Flowers

• Seeds

• Roots

Pteridophytes differ form Bryophytes in having?

• Absence of sporophyte

• Gametophyte dependent on sporophyte

• Sporophyte dependent on Gametophyte

• Independent Gametophyte & sporophyte

Selaginella & Salvinia are considered representing significant step towards evolution of seed habit because?

• female gametophuyte is free and gets dispersed like seeds

• female gametophyte lacks archegonia

• megaspore possess endosperm and embryo surrounded by seed coat

• embryo develops in female gametophyte which is retained on parent sporophyte

Assertion(A): heterospory and retention of female gametophyte are responsible for origin of seed habit in Selaginella

Reason (R): Psilotum is a living fossil

• Both A & R are true and R is the correct explanation of A

• Both A & R are True but R is not the correct explanation of A

• A is true but R is false

• Both A & R are false

Identify A,B &C from the following figure and choose the correct option

• A- Strobilus,

  B- nodes,

  C- leaves

• A- Strobilus,

  B- Node ,

  C- branch

• A- Sporophyll,

  B- node

  C- internode

• A-sporophyll,

  B- internode

  C- node