Moss peat is used as a packing material for sending flowers and live plants to distant places because:

(1) it is easily available

(2) it is hygroscopic

(3) it reduces transpiration

(4) it serves as a disinfectant

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Conifers differ from grasses in the :

(1) production of seeds from ovules

(2) lack of xylem tracheids

(3) absence of pollen tubes

(4) formation of endosperm before fertilization

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Gymnosperms: I
General Account of Angiosperms
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In a moss the sporophyte:

(1) is partially parasitic on the gametophyte

(2) produces gametes that give rise to the gametophyte

(3) arises from a spore produced from the gametophyte

(4) manufactures food for itself, as well as for the gametophyte

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Monoecious plant of Chara shows occurrence of

(1) antheridiophore and archegoniophore on the same plant

(2) stamen and carpel on the same plant

(3) upper antheirdium and lower oogonium on the same plant

(4) upper oogonium and lower antheridium on the same plant

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In the prothallus of a vascular cryptogam, the antherozoids and eggs mature at different times. As a result:

(1) there is no change in success rate of fertilization

(2) there is high degree of sterility

(3) one can conclude that the plant is apomictic

(4) self fertilization is prevented

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General Accounts of Gymnosperms:II
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In which of the following gametophyte is not independent free-living?

(a)  Funaria           (b)  Marchantia

(c)  Pteris              (d)  Pinus

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General Accounts of Gymnosperms:II
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Which one of the following statements is wrong?

(1) Algin and carrageenan are products of algae

(2) Agar-agar is obtained from Gelidium and Gracilaria

(3) Chlorella and Spirulina are used as space food

(4) Mannitol is stored food in Rhodophyceae

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Male gametes are flagellated in

(a) Polysiphonia

(b) Anabaena

(c) Ectocarpus

(d) Spirogyra

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The most primitive among the living vascular plants are the

(1) ferns

(2) brown algae

(3) mosses

(4) cycads

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Non flowering plants are included under

(1) cryptogamae

(2) phanerogamae

(3) angiosperms

(4) Both a and b

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Clssification System: II
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