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BIOLOGY

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Assertion : Sperms of Riccia are biflagellate. Reason : Sperms show swimming nature.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

Assertion : The primary protonema of moss by death and decay of cells may break into fragments. Reason : Each fragment gives rise to leafy gametophyte.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

Assertion : Sporogonium of Riccia is totally dependent on the gametophyte. Reason : Sporogonium of Marchantia is partly dependent on the gametophyte.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

Assertion : All bryophytes are land dwellers. Reason : Water is necessary to complete their life-cycle.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

Assertion : Meiospores form genetically and functionally different progenies. Reason : Mitospores form progenies identical to parents.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

Assertion : Spirogyra shows anisogamy. Reason : Gametes are identified on the basis of their motility.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

Assertion : Riccia is many cells thick. Reason : Riccia has both assimilatory region and storage region.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

Assertion : Liverworts fail to spread to a new locality through fragmentation. Reason : Gemmae are helpful in propagating liverworts in different locality.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

Assertion : The embryo of bryophyte is independent. Reason : The zygote of thallophyte is dependent.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

Assertion : Bryophytes possess archegonium as a female sex organ. Reason : Algae also possess the archegonium

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

Assertion : The bryophytes exist in two phases – gametophyte and sporophyte. Reason : The sporophyte is nutritionally independent.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

Assertion : The sex organs in the bryophytes are jacketed. Reason : Bryophytes are land plants.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

Assertion : Red algae contribute in producing coral reef. Reason : Some red algae secrete and deposit calcium carbonate our their walls.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

Assertion : Spirogyra shows haplontic life cycle. Reason : Zygotic meiosis occurs in Spirogyra.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

Assertion : Isogamy is a primitive type of sexual reproduction. Reason : The gametes are of different sizes.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

Assertion : Spirogyra is slippery in touch. Reason : Spirogyra consists a gelatinous sheath.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

Assertion : Only red algae are able to flourish at the great depth of sea. Reason : Red algae has the pigments r-phycoerythrin and r-phycocyanin.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

Assertion : Zygospore of Ulothrix forms meiozoospores and meioaplanospores. Reason : Both are motile.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

Assertion : All the cells Ulothrix filament are alike. Reason : Ulothrix filament is unbranched.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

Assertion : Chlorella could be utilised to keep the air in space vehicles. Reason : The space travellers feed on Chlorella soup.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

Assertion : In green algae, the eye-spot is present in the cell. Reason : Eye-spot is meant for respiration.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

Assertion : Pyrenoids are utilised during starvation. Reason : Pyrenoids are proteinaceous bodies.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

Assertion : Bryophytes and tracheophytes have an embryo stage in their life cycle. Reason : Embryophyta are terrestrial plants.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

Assertion : Each group of algae has a characteristic colour. Reason : Each group of algae show predominance of one pigment.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

Assertion : Algae and fungi are grouped in thallophyta. Reason : Algae and fungi show no differentiation in thallus.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

Assertion : Algae is a collective term for all those chlorophyll bearing organisms which are thalloid. Reason : Presently algae are grouped in three kingdom.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

Assertion : Heterotrichous filaments are more advanced than branched filaments. Reason : Heterotrichous filaments have prostrate and projecting system.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

Make correct pair

  Cyanophyceae a.     Green colour Chlorophyceae b.    Blue green colour Phaeophyceae c.     Red colour Rhodophyceae d.    Brown colour (a)  Aa,...

Match items in Column I with those in Column II

Column I                                          Column II (A)  Peritrichous flagellation  (J)   Ginkgo (B)  Living fossil                       (K)  Macrocystes (C)  Rhizophore                        (L)  Escherichia coli (D) ...

Of the following group which secrete and deposit calcium carbonate and appear like corals

(a)  Red algae                           (b)  Brown algae (c)   Blue green algae                (d)    All...

A protective cap or hood like covering on the developing capsule in a moss or liverwort is known as

(a)  Spine                                  (b)  Calyptra (c)   Lodicule                             (d)  Calyptrogen Answer: b

34. Number of cotyledons is Zea, Cycas and Pinus respectively are

(a)  1,1, many                          (b)  1,2,1 (c)   1,1,1                                  (d)  1,2,many Answer: d

A. Heterospory B. Seed formation C. Fertilization process What is appropriate for gymnosperms

(a)  AB true C false                   (b)  BC true A false (c)   ABC all true                       (d)  ABC all false Answer: c

mature ligule, having a prominent basal portion, is called

(a)  Trichocyst                          (b)  Heterocyst (c)   Rhizophore                        (d)  Glossopodium Answer:  d

When the gametophyte is not formed by spores but by any other part of sporophyte, it is known as

(a)  Multispory                         (b)  Polyspory (c)   Apospory                           (d)  Germination Answer: c

In which of the following, multiciliated/multiflagelated antherozoids are present

(a)  Riccia and Funaria            (b)  Pteris and Cycas (c)   Riccia and Cycas               (d)  Marchantia and Riccia Answer: b

The endosperm of gymnosperm is

(a)  Triploid                              (b)  Haploid (c)   Diploid                               (d)  Polyploid Answer: b

Sieve tubes of Pinus have sieve plates on

(a)  Radial walls                       (b)  Tangential walls (c)   Transverse walls               (d)  None of the above Answer: a

Heteromorphic alternation of generations occurs is

(a)  Funaria, Spirogyra, Selaginella (b)  Funaria, Selaginella, Cycas (c)   Spirogyra, Rhizopus, Selaginella (d)  Rhizopus, Funaria, Spirogyra Answer: b

In Pinus, the approximate time for fertilization after pollination is

(a)  Only a few hours              (b)  Only a few days (c)   Only a few weeks              (d)  About one year Answer:...

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