General
✓✗In mosses, the sex organs are borne
- on the rhizoids
- on the primary protonema
- on the capsule wall
- at the apex of leafy shoots
General
✓✗Sporophylls are photosynthetic in
- Pteridophyta
- Bryophyta
- Gymnosperm
- Angiosperm
General
✓✗The simplest brown algae, such as Ectocarpus, are
- massive kelps
- colonial forms
- simple branched filaments
- unicellular flagellates
General
✓✗The thallus organization of Volvox is
- Multicellular and coccoid
- Colonial and non-flagellate
- Colonial and motile
- Unicellular
General
✓✗In which of the following would you place the plants having vascular tissue but lacking seeds?
- Bryophytes
- Gymnosperms
- Algae
- Pteridophytes
General
✓✗Which one of the following is wrongly matched?
- Nostoc - Water blooms
- Basidiomycetes - Puffballs
- Sargassum - Chlorophyll
- Spirogyra - Motile gametes
General
✓✗Chloroplasts are present in the spores of
- Yeast
- Rhizopus
- Dryopteris
- Funaria
General
✓✗Fertile leaves of ferns are called
- Posophylls
- Mesophylls
- Sporophylls
- Cataphylls
General
✓✗In bryophytes, the zygote develops into a sporophyte which is
- free-living and photosynthetic
- a thalloid haploid structure
- multicellular and dependent on the gametophyte
- unicellular and short-lived
General
✓✗Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Pteridophytes are restricted to narrow geographical regions.
Reason (R): Their gametophytes need cool, damp, shady places, and water is required for fertilisation.
In the light of the above statements, choose the correct answer from the options given below.
Assertion (A): Pteridophytes are restricted to narrow geographical regions.
Reason (R): Their gametophytes need cool, damp, shady places, and water is required for fertilisation.
In the light of the above statements, choose the correct answer from the options given below.
- Both Assertion and Reason are true and Reason is the correct explanation of Assertion
- Both Assertion and Reason are true but Reason is not the correct explanation of Assertion
- Assertion is true but Reason is false
- Both Assertion and Reason are false
General
✓✗After fertilisation in gymnosperms,
- a triploid endosperm is formed
- zygote forms embryo and ovules form seeds
- the pollen tube becomes the seed coat
- the ovary develops into a fruit
General
✓✗Match the algal class with its stored food and cell wall.
Choose the correct answer from the options given below.
| Class | Stored food | Cell wall |
| (a) Chlorophyceae | (i) Mannitol, laminarin | (p) Cellulose, pectin and polysulphate esters |
| (b) Phaeophyceae | (ii) Floridean starch | (q) Cellulose and algin |
| (c) Rhodophyceae | (iii) Starch | (r) Cellulose |
- (a)-(iii)-(q), (b)-(i)-(r), (c)-(ii)-(p)
- (a)-(iii)-(r), (b)-(ii)-(q), (c)-(i)-(p)
- (a)-(ii)-(r), (b)-(i)-(q), (c)-(iii)-(p)
- (a)-(iii)-(r), (b)-(i)-(q), (c)-(ii)-(p)
General
✓✗Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Sexual reproduction in Spirogyra is isogamous.
Reason (R): The gametes of Spirogyra are flagellated.
In the light of the above statements, choose the correct answer from the options given below.
Assertion (A): Sexual reproduction in Spirogyra is isogamous.
Reason (R): The gametes of Spirogyra are flagellated.
In the light of the above statements, choose the correct answer from the options given below.
- Both Assertion and Reason are true and Reason is the correct explanation of Assertion
- Both Assertion and Reason are true but Reason is not the correct explanation of Assertion
- Assertion is true but Reason is false
- Both Assertion and Reason are false
General
✓✗The endosperm of a gymnosperm is
- diploid
- triploid
- haploid
- polyploid
General
✓✗An alga very rich in protein is
- Spirogyra
- Chlorella
- Nostoc
- Ulothrix