NCERT Class X Science Class: Chapter –8. How Do Organisms Reproduce? – Part-2

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Question 6:

Characters that are transmitted from parents to offspring during reproduction show

(a) Only similarities with parents

(b) Only variations with parents

(c) Both similarities and variations with parents

(d) Neither similarities nor variations

Answer: C

Image parents variations

Image Parents Variations

Image parents variations

Question 7:

A feature of reproduction that is common to Amoeba, Spirogyra and Yeast is that

(a) They reproduce asexually

(b) They are all unicellular

(c) They reproduce only sexually

(d) They are all multicellular

Answer: A

Image the asexual reproduction

Image the Asexual Reproduction

Image the asexual reproduction

Question 8:

In Spirogyra, asexual reproduction takes place by

(a) Breaking up of filaments into smaller bits

(b) Division of a cell into two cells

(c) Division of a cell into many cells

(d) Formation of young cells from older cells.

Answer: A

Image the fragmentation of Spirogyra,

Image the Fragmentation of Spirogyra,

Image the fragmentation of Spirogyra,

Question 9:

The ability of a cell to divide into several cells during reproduction in Plasmodium is called

(a) Budding

(b) Reduction division

(c) Binary fission

(d) Multiple fission

Answer: D

Image the multiple fission in plasmodium

Image the Multiple Fission in Plasmodium

Image the multiple fission in plasmodium

Question 10:

The correct sequence of reproductive stages seen in flowering plants is

(a) Gametes, zygote, embryo, seedling

(b) Zygote, gametes, embryo, seedling

(c) Seedling, embryo, zygote, gametes

(d) Gametes, embryo, zygote, seedling

Answer: A

Sequence of reproductive stages in flowering plants

Sequence of Reproductive Stages in Flowering Plants

Sequence of reproductive stages in flowering plants

Question 11:

The number of chromosomes in parents and off springs of a particular species remains constant due to

(a) Doubling of chromosomes after zygote formation

(b) Halving of chromosomes during gamete formation

(c) Doubling of chromosomes after gamete formation

(d) Halving of chromosomes after gamete formation

Answer: B

Image Dna replication

Image Dna Replication

Image Dna replication