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1
Tissue culture is used for rapid vegetative propagation as well as for the production of disease-free and pest-resistant plants. It is also known as ___________________.
Vegetative propagation
Micro propagation
Macro -propagation
None of these .
2
Some plants like _________________, chrysanthemum and asparagus can be grown by the method of tissue culture.
Orchids
Cactus
Aloe Vera
3
A small part of one plant called _____________________ is inserted into the stem or root system of another plant fixed into the soil.
Root stock
Scion
Bud graft
4
Spores are protected by ___________________ when conditions are unfavorable .
Thick walled
Thin walled
Smooth walled
5
Spores are single celled or several celled reproductive bodies that are ____________________ in shape .
Cylindrical
Spherical
Oval
6
Which of the following are correct about vegetative propagation in plants?
(a) Plants such as grass have horizontal stems growing parallel to the ground, almost touching it.
(b) Vegetative parts such as root, stem and leaf can be used to produce new plants. It is known as vegetative reproduction.
Only (a) is correct .
Only (b) is correct .
Both (a) and (b) is correct .
7
In _________________ reproduction, the offspring is produced by a single parent with or without the involvement of gamete formation.
Sexual
Asexual
Both (a) and (b) are correct.
None of these.
8
Hydra reproduces asexually by growing buds from its body this is called _________________ .
Fragmentation
Budding
9
Spores are released when case bursts open and grow into ____________________ .
New plant
Embryo
Zygote
10
Which of the following are correct :
(a) Reproduction is a biological process in which an organism gives rise to young ones or offsprings similar to itself.
(b) In asexual reproduction, the offspring is produced by a single parent with or without the involvement of gamete formation.
Only (a) is correct.
Only (b) is correct.
11
In this reproductive process adult organism breaks up into two or more pieces called __________
Propogation
Both A and B
None of these
12
Which of the following are correct ?
(a) Spores are single celled or several celled reproductive bodies that are cylindrical in shape.
(b) They are protected by thick wall when conditions are unfavorable.
13
14
What form of reproduction is at work when part of the parent plant breaks off to form new plants?
Diversification
Sexual reproduction
Germination
15
(a) In asexual reproduction, the offspring is produced by a single parent with or without the involvement of gamete formation.
(b) In sexual reproduction, the offspring is produced by two parents involving fusion of male and female gametes.
(c) In sexual reproduction, the offspring is produced by a single parent with or without the involvement of gamete formation.
Only (a) and (b) are correct.
Only (b) and (c) are correct.
Only (a) and (c) are correct.
All of these.