15253.Which of the following plant groups is called amphibians?
Tracheophyta
Bryophyta
Pteridophyta
Thallophyta
15258.Chlorenchyma is found in:
Spore capsule of a moss
Mycelium of a green mould such as Aspergillus
Cytoplasm of Chlorella
Pollen tube of Pinus
15259.Which of the followings plant material is an efficient water imbibant?
Agar
Cellulose
Lignin
Pectin
15260.Which of the following plant species you would select for the production of bioethanol?
Jatropha
Brassica
Zea mays
Pongamia
15261.Which of the following is harvested commercially to produce agar?
Brown algae
Blue-green algae
Green algae
Red algae
15263.In a monoecious plant
Male and female sex organs are on the same individual
Male and female gametes are of two morphologically distinct types
Male and female sex organs are on different individuals
All the stamens are fused to form one unit
15264.Select one of the following pairs of important features distinguishing Gnetum from Cycas and Pinus and showing affinities with angiosperms:
Presence of vessel elements and absence of archegonia
Absence of resin duct and leaf venation
Embryo development and apical meristem
Perianth and two integuments
15265.Flagellated male gametes are present in all the three of which one of the following sets?
Zygnema, Saprolegnia and Hydrilla
Anthoceros, Funaria and Spirogyra
Riccia, Dryopteris and Cycas
Fucus, Marsilea and Calotropis
15266.Conifers differ from grasses in the
Absence of pollen tubes
Lack of xylem tracheids
Production of seeds from ovules
Formation of endosperm before fertilization
15267.Vessels are found in:
All angiosperms, all gymnosperms and some pteridophyta
Most of the angiosperm and few gymnosperms
All angiosperms and some gymnosperm
All pteridophyta
15268.Which one of the following is a correct statement?
Antheridiophores and archegoniophores are present in pteridophytes.
Origin of seed habit can be traced in pteridophytes.
Pteridophyte gametophyte has a protonemal and leafy stage.
In gymnosperms female gametophyte is free-living.
15269.Which one of the following is a correct statement?
Fronds are found in Bryophytes.
Heterocysts are found in Nostoc.
Diatoms produce basidiospores.
Multiciliated sperms are found in Angiosperms.
15270.Moss peat is used as a packing material for sending flowers and live plants to distant places because
It is easily available
It is hygroscopic
It reduces transpiration
It serves as a disinfectant
15271.Haploid brown, hairlike, delicate unicellular outgrowths are:
Root hairs of Gymnosperms
Paraphyses of mosses
Root modules of Pulses
Rhizoids of fern plants
15272.Choose the correct statement :
Apophysis is the basal fertile part of the capsule in Funaria
Apophysis is the apical sterile part of the microsporophyll in Cycas
Apospory is the development of sporophyte from vegetative cells of the gametophyte
Apogamy is the development of gametophyte from the vegetative cells of the sporophyte