Pigments common to all algae are
chlorophyll- a and phycobilins
chlorophyll- a and carotenoids
chlorophyll- a and chlorophyll- b
chlorophyll- b and carotenoids
B.
chlorophyll- a and carotenoids
The colour of algal thallus, varies in different class of algae due to presence of definite chemical compounds or pigments. The chlorophyll- a and carotenoids are present in all algae.
Agar-agar commonly used in bacterial cultures and medication is obtained from :
Sargassum
Gelidium
Ulothrix
Ulva
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
A plant having seeds but lacking flowers and fruits belong to
pteridophytes
mosses
ferns
gymnosperms
A bryophyte which harbours a nitrogen fixing blue-green alga in its thallus is :
Pogonatum
Riccia
Marchantia
Anthoceros
Rarely among angiosperms the pollen grains influenced the endosperm. This is called as :
Metaxenia
Nemec phenomenon
Xenia
Mesogamy