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11th Standard Botany - Plant Kingdom Book Back Questions

Published on: 02/09/2019

Botany - Plant Kingdom

Download Tamil Nadu 11th Standard Biology question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.

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Std: 11th Standard - Biology

chapter: - Model Question paper

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Questions:

Multiple Choice Question

4 x 1 = 4

In gymnosperm endosperm is formed_______.

(a)

At the time of fertilization

(b)

Before fertilization

(c)

After fertilization

(d)

Along with the development of embryo

The haploid number of chromosome for an Angiosperm is 14, the number of chromosome in its endosperm would be

(a)

(b)

(c)

(d)

Which of following represents gametophytic generation in pteridophytes?

(a)

Prothallus

(b)

Thallus

(c)

Cone

(d)

Rhizophore

Which of the plant group has gametophyte as a dominant phase?

(a)

Pteridophytes

(b)

Bryophytes

(c)

Gymnosperms

(d)

Angiosperms

Generic 5

1 x 5 = 5

Differentiate haplontic and diplontic life cycle.

Generic 2

2 x 2 = 4

What do you infer from the term pycnoxylic?

What is plectostele? Give example.

Generic 3

2 x 3 = 6

Do you agree with the statement 'Bryophytes need water for fertilization'? Justify your answer.

Do you think shape of chloroplast is unique for algae? Justify your answer.

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Answers Key:

Multiple Choice Question

4 x 1 = 4

(b)
Before fertilization

(a)
Prothallus

(b)
Bryophytes

Generic 5

1 x 5 = 5

S.No	Haplontic life cycle	Diplontic life cycle
1	Gametophytic phase is dominant, photosynthetic and independent, whereas sporophytic phase is represented by the zygote. Zygote undergoes meiosis to restore haploid condition.	Sporophytic phase (2n) is dominant, photosynthetic and independent. The gametophytic phase is represented by the single to few-celled gametophyte. The gametes fuse to form zygote which develops into sporophyte.
2	Eg: Volvox, Spirogyra.	Eg: Fucus, gymnosperms and angiosperms.

Generic 2

2 x 2 = 4

In pycnoxylic the secondary growth in wood is compact with narrow medullary ray. Eg. Pinus

Xylem plates alternate with phloem plates. Eg: Lycopodium clavatum.

Generic 3

2 x 3 = 6

Yes. The antheridia produce biflagellate antherozoids which swim in thin film of water and reach the archegonium and fuse with the egg to form diploid Zygote. Hence they need water for completing their life cycle.

Yes, the shape of chloroplast is unique for algae.

S.No	Shapes	Examples
1	Cup shaped	Chlamydomonas
2	Discoid	Chara
3	Girdle shaped	Ulothrix
4	Reticulate	Oedogonium
5	Spiral	Spirogyra
6	Stellate	Zygnema
7	Plate like	Mougeotia/td>