In Ulothrix meiosis takes place in

• cells of the filament

• holdfast

• zygote

• zoospores.

122.

Mossess and ferns are found in moist and shady places because both

• require presence of water for fertilization

• do not need sunlight for photosynthesis

• depend for their nutrition on microorganisms which can survive only at low temperature

• cannot compete with sun-loving plants.

People recovering from long illness are often advised to include the alga Spirulina in their diet because it

• makes the food easy to digest

• is rich in proteins

• has antibiotic properties

• restores the intestinal microtlora

Azolla is used as a biofertilizer because it

• multiplies very fast to produce massive biomass

• has association of nitrogen - fixing Rhizobium

• has association of nitrogen - fixing cyanobacteria

• has association of mycorrhiza

carthamus tinctorius belongs to family

• Asteraceae

• Solanaceae

• Malvaceae

• Fabaceae

In oogamy, fertilization involves :

• a small non- motile female gamete and a large motile male gamete

• a large motile female gamete and a small non-motile male gamete

• a large non- motile female gamete and a small motile male gamete

• a large non-motile female gamete and a small non-motile male gamete

In angiosperms, triple fusion results in the formation of:

• zygotic nucleus

• polar nucleus

• secondary nucleus

• primary endosperm nucleus

Seed habit originated in

• Bryophyta

• Pteridophyta

• Gymnosperms

• Angiosperms

Read the following statements (IV) and answer the question which follows them

I. In liverworts, mosses and ferns gametophytes are free living.

II. Gymnosperms and some ferns are heterospores.

III. Sexual reproduction in Fucus, Volvox and Albugo is oogamous.

IV. The sporophyte in liverworts is more elaborate than that in mosses.

How many of the above statements are correct?

• One

• Two

• Three

• Four

The most common type of ovule found in angiosperms is

• Anatropous ovule

• Atropous ovule

• Campylotropous ovule

• Hemitropous ovule