A plant having seeds but lacking flowers and fruits belong to

• pteridophytes

• mosses

• ferns

• gymnosperms

Prothallus of fem has :

• antheridia and archegonia on lower surface

• antheridia and archegonia on upper surface

• antheridia on upper surface and archegonia on lower

• antheridia on lower surface and archegonia on upper surface

Rarely among angiosperms the pollen grains influenced the endosperm. This is called as :

• Metaxenia

• Nemec phenomenon

• Xenia

• Mesogamy

Pratonema is found in the life cycle of:

• Spirogyra

• Rhizopus

• Escherichia

• Funaria

A bryophyte which harbours a nitrogen fixing blue-green alga in its thallus is :

• Pogonatum

• Riccia

• Marchantia

• Anthoceros

Mosses are attached to substratum by :

• roots

• capsule

• rhizoids

• cistron

A protein rich green alga is :

• Chlorella

• Spirulina

• Spirogyra

• Ulothrix

Pigments common to all algae are

• chlorophyll- a and phycobilins

• chlorophyll- a and carotenoids

• chlorophyll- a and chlorophyll- b

• chlorophyll- b and carotenoids

Agar-agar commonly used in bacterial cultures and medication is obtained from :

• Sargassum 

• Gelidium

• Ulothrix

• Ulva

Male cone of Pinus possesses :

• mega sporophylls

• microsporophylls

• anthers

• ligules