Which of the following are homosporous pteridophytes?

I. Selaginella

II. Lycopodium

III. Salvinia

IV. Equisetum

(1) I and IV only

(2) II and III only

(3) II and IV only

(4) III and IV only

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Pick the correct group consisting of all genera exhibiting homospory.

(1) Lycopodium, Psilotum, Selaginella, Equisetum

(2) Equisetum, Pteris, Salvinia, Psilotum

(3) Salvinia, Pteris, Lycopodium, Selaginella

(4) Equisetum, Psilotum, Lycopodium, Pteris

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In the given diagrams, some of the algae have been labelled as A, B, C, D and E. Choose the correct option to identify these algae.

 

A

B

C

D

E

(1)

Dictyota

 Polysiphonia 

Porphyra

Fucus

Laminaria

(2)

  Porphyra 

Dictyota

 Laminaria 

Fucus

Polyspiphonia

(3)

Dictyota

Polysiphonia

Porphyra

Laminaria

Fucus

(4)

Fucus

Porphyra

Dictyota

 Polysiphonia 

Laminaria

 

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Classical Taxonomy is based on

(1) morphological traits

(2) habitat of organisms

(3) similarities and dissimilarities of behaviour

(4) phylogeny

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Read the following statements reagrding bryophytes and choose the incorrect option.

(1) Gametophytic phase is dominant in life cycle

(2) Fertilisation takes place in presence of water

(3) Zygote undergoes meiosis to produce sporophyte

(4) Sporophyte isphysiologically dependent on gametophyte

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Artificial taxonomy is connected with the

(1) use of habit and habitat of organisms

(2) based on the presence or absence of chemicals in cells or tissues

(3) based on morphological traits

(4) based on evolutionary history of a species

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Fertilisation is internal is Spirogyra. Where would you get zygospores, if 3 filaments are conjugating by scalariform conjugation?

(1) Lateral filaments

(2) Central filaments

(3) Central filament and both lateral filaments

(4) Either central or lateral filament

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In Cycas

(1) ovlule and microsporangia are present in same sporophyll

(2) micro and megasporophyllus are present in same cone

(3) male cone and megasporophylls are borne on the same plant

(4) male cone and megasporophylls are borne on separate individual plants

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Gelatin, an important raw material for preparation of photographic emulsion is a by product of

(1) chicken

(2) forest

(3) cattle

(4) fish

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Cycas is classified as a gymnosperms due to its

(1) motile sperms

(2) fruit formation

(3) naked ovule

(4) pycnoxylic wood

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