Identify the incorrectly matched pair:

Chlamydomonas:  

Microscopic unicellular algae

2.

Volvox:

Colonial algae

3.

Ulothrix:

Filamentous algae

4.

Fucus:

Isogamous algae

  •   

  • 2
  • 3
  • 4

Identify the incorrect statement regarding algae:

  • Around 70 species of freshwater algae can be used as food.

  • At least a half of the total carbon dioxide fixation on earth is carried out by algae through photosynthesis.

  • Certain marine brown and red agae produce large amounts of hydrocolloids (water holding substances), e.g., algin (brown algae) and carrageen (red algae) which are used commercially.

  • Agar, obtained from Gelidium and Gracilaria are used to grow microbes and in preparations of ice-creams and jellies.

What is not true for red algae?

  • Lack centriole and flagella

  • Accessory pigments include phycocyanin, phycoeythrin and allophycocyanin

  • They reproduce using alternation of generation

  • The stored food is floridean starch very similar to cellulose

Identify the incorrect statement regarding green algae?

  • They contain chl a, chl b as well as carotenoids.

  • The chloroplasts may be discoid, plate-like, reticulate, cup-shaped, spiral or ribbon-shaped in different species.

  • Most members have one or more storage bodies called pyrenoids located outside the chloroplasts.

  • They usually have a rigid cell wall made of an inner layer of cellulose and an outer layer of pectose.

Consider the following statements regarding brown algae:

I. The pigments are chl a, c and xanthophylls, fucoxanthin

II. Storage food is laminarin and mannitol 

III. The cellulosic cell wall is covered with algin

IV. They have a centrally located vacuole

V. Their photosynthetic organs are called as fronds - leaf like structures

VI. They have pear shaped biflagellate zoospores

VII. They have two unequal laterally attached flagella.

The number of correct statements is

  • 5

  • 6

  • 7

  • 4

Consider the following adaptations seen in plants:

I. Lack of cuticle

II. Presence of stomata for exchange of gases

III. Evolution of leaf

IV. Dominance of sporophyte

V. Structural support of vascular tissue

Which of the above adaptations would be required in a plant if it has to be successfully adapted to life on land?

  • All but I

  • All but I and III

  • I, II, III and IV

  • All

Identify the incorrect statement regarding mosses:

  • Leaves are one cell thick except at the midrib and lack stomata

  • The first gametophyte stage is protonema that is creeping and green

  • The second stage is the leafy stage, which develops from the secondary protonema as a lateral bud.

  • Rhizoids are elongated and unicellular

Consider the following statements regarding bryophytes:

I. Bryophytes are also called amphibians of the plant kingdom because they are depndent on water for sexual reproduction.

II. They play an important role in plant succession on bare rocks.

III. They lack true roots, stem or leaves.

IV. The sex organs in bryophytes are multicelluar.

V. They produce biflagellate zoospres.

VI. Archegonium is flask-shaped and produces a single egg.

The number of corrected statements is

  • 3

  • 4

  • 5

  • 6

Which of the following statements regarding gymnosperms are correct?

I. Ovules are naked - not enclosed by any ovary wall before fertilisation but seeds that develop after fertilisation are covered.

II. In all living Gymnosperms, sporophyte is dominant over the gametophyte.

III. They are heterosporous.

IV. The male and female gametophytes do not have an independent existence.

  • I, II and III

  • I, III and IV

  • II, III and IV

  • I, II, III and IV

Which of the following algae is likely to be found in the deepest waters?

  • Green

  • Brown

  • Red

  • All are found at equal depths

Which pair[s] is/are in incorrectly matched?

I. Phaeophyceae - Algin in cell wall

II. Chlorophyceae - Laminarin is stored food

III. Rhodophyceae - 2, unequal, lateral flagella

  • Only II

  • Only III

  • I and II only

  • II and III only

The gemmae produced by some liverworts function as:

  • A water gathering structure

  • A light capturing structure

  • A sexual structure

  • An asexual structure

Which one is a wrong statement?

  • Archegonia are found in Bryophyta, Pteridophyta and Gymnosperms.

  • Mucor has biflagellate zoospores.

  • Haploid endosperm is typical feature of gymnosperm.

  • Brown algae have chlorophyll-a and c, and fucoxanthin.

Read the following five statements (I to V) and select the option with all correct statements.

I. Mosses and lichens are the first organisms to colonise a bare rock.

II. Selaginella is a homosporous pteridophyte.

III. Coralloid roots in Cycas have VAM.

IV. main plant body in bryophytes is gametophytic, whereas in pteridophytes it is sporophytic.

V. In gymnosperms, male and female gametophytes are present within sporangia located on sporophyte.

  • I, III and IV

  • II, III and IV

  • I, IV and V

  • II, III and V

Zygotic meiosis is characteristic of

  • Fucus

  • Funaria

  • Chlamydomonas

  • Marchantia

Select the mismatch

(1)

Pinus

Dioecious

(2)

Cycas

Dioecious

(3)

Salvinia

Heterosporous

Equisetum     

Homosporous

  • (4)  

  • 1
  • 2
  • 3

Double fertilisation is exhibited by

  • gymnosperms

  • algae

  • fungi

  • angiosperms

Life cycle of Ectocarpus and Fucus respectively are

  • Haplontic, Diplontic

  • Diplontic, Haplodiplontic

  • Haplodiplontic, Diplontic

  • Haplodiplontic, Haplontic

Conifers are adapted to tolerate extreme environmental conditions because of

  • broad hardy leaves

  • superficial stomata

  • thick cuticle

  • the presence of vessels

Which one of the following statements is wrong?

  • Algae increases the level of dissolved oxygen in the immediate environment

  • Algin is obtained from red algae and carrageen from brown algae

  • Agar-agar is obtained from Gelidium and Gracilaria

  • Laminaria and Sargassum are used as food

In bryophytes and pteriodophytes, transport of male gametes requires

  • insects

  • birds

  • water

  • wind

Select the correct statement.

  • Salvinia, Ginkgo and Pinus all are gymnosperms

  • Sequoia is one of the tallest trees

  • The leaves of gymnosperms are not well adapted to extremes of climate

  • Gymnosperms are both homosporous and heterosporous

Chromatophores take part in

  • photosynthesis

  • growth

  • movement

  • respiration

Which one of the following shows isogamy with non-flagellated gametes?

  • Sargassum

  • Ectocarpus

  • Ulothrix

  • Spirogyra

Which of the following is responsible for peat formation?

  • Marchantia

  • Riccia

  • Funaria

  • Sphagnum

Male gametophyte with least number of cells is

(4) Pinus

  • Pteris

  • Funaria

  • Lilium

  • 4

Select the wrong statement.

  • Isogametes are similar in structure, function and behaviour

  • Anisogametes differ either in structure, function and behaviour

  • In oomycetes female gamete is smaller and motile, while male gamete is larger and non-motile

  • Chlamydomonas exhibits both isogamy and anisogamy and Fucus shows oogamy

Isogamous condition with non-flagellated gametes is found in

  • Chlamydomonas

  • Spirogyra

  • Volvox

  • Fucus

Besides paddy fields, cyanobacteria are also found inside vegetative part of

  • Pinus

  • Cycas

  • Equisetum

  • Psilotum

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

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