Vidaara.orgClass 11 · Mathematics
CodeVID-M11-WS
Plant Kingdom — Practice Worksheet
Name: ____________________
Roll No.: __________
Date: ____________
General Instructions
- All questions are compulsory.
- Choose the correct option (A, B, C or D) for each question.
- The answer key is at the end — try the paper first!
Section A — Multiple Choice (1 mark each)
15 × 1 = 15 marks
1.
Members of Kingdom Plantae are mostly:
- A.Prokaryotic heterotrophs
- B.Eukaryotic photosynthetic autotrophs
- C.Single-celled
- D.Non-cellular
2.
The simple, undifferentiated plant body of an alga is a:
- A.Cormus
- B.Thallus
- C.Mycelium
- D.Rhizome
3.
Green algae (Chlorophyceae) store food mainly as:
- A.Glycogen
- B.Starch
- C.Laminarin
- D.Floridean starch
4.
The brown colour of Phaeophyceae is due to:
- A.Phycoerythrin
- B.Fucoxanthin
- C.Chlorophyll b
- D.Anthocyanin
5.
Agar, used in laboratory cultures, is obtained from:
- A.Green algae
- B.Brown algae
- C.Red algae
- D.Fungi
6.
Bryophytes are called the 'amphibians of the plant kingdom' because they:
- A.Live in deserts
- B.Need water for sexual reproduction
- C.Have flowers
- D.Bear seeds
7.
Bryophytes lack:
- A.Chlorophyll
- B.Vascular tissue (xylem/phloem)
- C.A gametophyte
- D.Spores
8.
The first true land plants to have vascular tissue are the:
- A.Algae
- B.Bryophytes
- C.Pteridophytes
- D.Gymnosperms
9.
In pteridophytes, the dominant plant body is the:
- A.Gametophyte
- B.Sporophyte
- C.Prothallus
- D.Seed
10.
Gymnosperms are characterised by:
- A.Seeds enclosed in fruit
- B.Naked seeds
- C.No seeds
- D.Flowers with petals
11.
Angiosperms differ from gymnosperms because their seeds are:
- A.Naked
- B.Enclosed inside a fruit
- C.Absent
- D.Always parasitic
12.
A unique feature of angiosperms is:
- A.Double fertilisation
- B.Naked seeds
- C.Lack of flowers
- D.No vascular tissue
13.
A plant with one cotyledon and parallel leaf venation is a:
- A.Dicotyledon
- B.Monocotyledon
- C.Gymnosperm
- D.Bryophyte
14.
The alternation between a haploid gametophyte and a diploid sporophyte is called:
- A.Alternation of generations
- B.Double fertilisation
- C.Heterospory
- D.Pollination
15.
The life cycle of seed plants, with a dominant diploid sporophyte, is:
- A.Haplontic
- B.Diplontic
- C.Haplo-diplontic
- D.Asexual only
Section B — Challenge / Olympiad (2 marks each)
6 × 2 = 12 marks
16.
Red algae can grow at greater ocean depths than green algae mainly because their pigment phycoerythrin:
- A.Absorbs the blue-green light that penetrates deep water
- B.Needs no light
- C.Is the same as chlorophyll
- D.Stores oxygen
17.
Heterospory in Selaginella is considered a precursor to the seed habit because:
- A.The female gametophyte is retained and nourished on the parent sporophyte
- B.It produces only one spore type
- C.It needs no water
- D.It forms a fruit
18.
Both bryophytes and pteridophytes still require water for reproduction because:
- A.Their motile male gametes must swim to the female gamete
- B.They live underwater
- C.They have no spores
- D.They are non-green
19.
A diplontic life cycle is advantageous on land because the dominant diploid sporophyte:
- A.Is better adapted, with vascular tissue, to survive land conditions
- B.Needs no water at all
- C.Has no chlorophyll
- D.Is single-celled
20.
Why are gymnosperm seeds called 'naked'?
- A.The ovules/seeds are not enclosed within an ovary or fruit
- B.They have no seed coat
- C.They lack an embryo
- D.They are colourless
21.
A botanist finds a plant with flowers, fruits enclosing seeds, two cotyledons and net-like leaf venation. It is a:
- A.Dicot angiosperm
- B.Monocot angiosperm
- C.Gymnosperm
- D.Pteridophyte
Answer Key
Section A — Multiple Choice (1 mark each)
- (B) Eukaryotic photosynthetic autotrophs
- (B) Thallus
- (B) Starch
- (B) Fucoxanthin
- (C) Red algae
- (B) Need water for sexual reproduction
- (B) Vascular tissue (xylem/phloem)
- (C) Pteridophytes
- (B) Sporophyte
- (B) Naked seeds
- (B) Enclosed inside a fruit
- (A) Double fertilisation
- (B) Monocotyledon
- (A) Alternation of generations
- (B) Diplontic
Section B — Challenge / Olympiad (2 marks each)
- (A) Absorbs the blue-green light that penetrates deep water
- (A) The female gametophyte is retained and nourished on the parent sporophyte
- (A) Their motile male gametes must swim to the female gamete
- (A) Is better adapted, with vascular tissue, to survive land conditions
- (A) The ovules/seeds are not enclosed within an ovary or fruit
- (A) Dicot angiosperm
Generated by Vidaara.org · Assignment VID-M11-WS · vidaara.org