Ch – How do organisms reproduce?
1. Fruits are formed from
a. Stamen
b. Stigma
c. Ovary
d. Ovule
2. Which among the following is a unicellular organism that reproduces by
budding? (a) Hydra
(b) Planaria
(c) Yeast
(d) Spirogyra
3. Which among the following does not reproduce by spore formation:
(a) Penicillium fungus
(b) Yeast fungus
(c) Mucor fungus
(d) Rhizopus fungus
4. The rapid spreading of bread mould on slices of bread are due to:
(i) Presence of large number of spores in air
(ii) Presence of large number of thread-like branched hyphae
(iii) Presence of moisture and nutrients
(iv) Formation of round shaped sporangia
(a) (i) and (iii)
(b) (ii) and (iv)
(c) (i) and (ii)
(d) (iii) and (iv)
5. The asexual reproduction in the Spirogyra involves:
(a) Breaking up of filaments into smaller bits
(b) Division of a cell into many cells
(c) Division of a cell into two cells
(d) Formation of a large number of buds
6 Reason for the greater similarities among the off springs produced by asexual
reproduction, is:
(i) Asexual reproduction involves only one parent
(ii) Asexual reproduction involves two parents
(iii) Asexual reproduction involves gametes
(iv) Asexual reproduction does not involve gametes
(a) (i) and (ii)
(b) (i) and (iii)
(c) (ii) and (iv)
(d) (i) and (iv)
7. The process of the division of cell into several cells during reproduction in
Plasmodium is termed as:
(a) Fragmentation
(b) Budding
(c) Multiple fission
(d) Binary fission
8. 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
9. A Planaria worm is cut horizontally in the middle into two halves P and Q such
that the part P contains the whole head of the worm. Another Planaria worm is
cut vertically into two halves R and S in such a way that both the cut pieces R
and S contain half head each. Which of the cut pieces of the two Planaria worms
could regenerate to form the complete respective worms?
(a) Only P
(b) Only R and S
(c) P, Rand S
(d) P, Q, R and S
10. The number of chromosomes in both parents and off springs of a particular
species remains constant because: (a) Chromosomes get doubled after zygote
formation
(b) Chromosomes get doubled after gamete formation
(c) Chromosomes get halved during gamete formation
(d) Chromosomes get halved after gamete formation
11. An organism capable of reproducing by two asexual reproduction methods
one similar to the reproduction in yeast and the other similar to the reproduction
in Planaria is:
(a) Spirogyra
(b) Hydra
(c) Bryophyllum
(d) Paramecium
(ii) It always results in the formation of zygote
(iii) off springs formed are clones
12. Reproductions essential for living organisms in order to
(a) Keep the individual organism alive
(b) Fulfil their energy requirement
(c) Maintain growth
(d) Continue the species generation after generation,
13. Planaria’smost remarkable characteristics are its ability to
A) Hibernation
b) Survive without air
c) Generate bioluminescence
d) Regenerate
14. Bryophyllum daigremontianum reproduces by
a).Vegetative propagation
b) Budding
c).Fission
d).Fragmentation
15. Budding, in hydra, is a form
A) Apoptosis
b) Sexual reproduction
c) Asexual reproduction
d) None of the above
16.____________is not a method of vegetative propagation A) Grafting
b) Cutting
c) Plasmogenesis
d) Layering
of class 10 biology
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Answer:
1. Ovary
2. Yeast
3. Yeast fungus
4. Formation of round shaped sporangia.
5. Breaking up of filaments in smaller bits
6. ii and iv
7. Multiple fission
8. Halving of chromosomes after gamete formation
9. Only R and S
10. d
11. It always results in the formation of zygotes
12. Continue the species generation after generation
13. Regenerate
14. Vegetative propagation
15. Asexual reproduction
16. Plasmogenesis
Explanation:
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