How Do Organisms Reproduce ?
- 1.Which of the following doesn't undergo vegetative propagation ?
- A.
Raspberry
- B.
Bougainvillea
- C.
Turmeric
- D.
Radish
- 2.The bud in hydra generally develops from the
- A.
Upper half
- B.
Lower half
- C.
Middle region
- D.
No specific site
- 3.There is a greater possibility for evolution of a new species in organisms which reproduce by
- A.
Binary fission
- B.
Budding
- C.
Fertilisation
- D.
Regeneration
- 4.Assertion: plants raised by vegetative propagation can bear flower and seed earlier than those produced from seeds. reason: plants who lost capacity to bear viable seeds, can propagate through vegetative propagation.
- A.
Both A and R correct and R is the correct explanation of A.
- B.
Only A correct.
- C.
Both A and R are true but R is not the correct explanation of A.
- D.
Only R is correct.
- 5.DNA copies generated may not be ___________ but will be ______________ to the original.
- A.
Similar, identical
- B.
Identical, similar
- C.
None of the above
- 6.Which of the following methods of asexual can be seen in Hydra and planaria ?
- A.
Regeneration
- B.
Fragmentation
- C.
Budding
- D.
Both i and iii
- 7.Offspring formed by sexual reproduction has more variation than those formed by asexual reproduction because
- A.
Sexual reproduction is a lengthy process
- B.
Gametes of parents have qualitatively different genetic composition
- C.
Genetic material comes from parents belonging to two species.
- D.
Greater amount of DNA is involved in sexual reproduction.
- 8.There is no natural death in amoeba and bacteria because
- A.
They cannot reproduce sexually
- B.
They reproduce by binary fission
- C.
Parental body is distributed among the offsprings
- D.
They are microscopic
- 9.Identify the reproductive part of Rhizopus
- A.
Sporangium
- B.
Hyphae
- C.
Sporangiophore
- D.
None of these
- 10.The tubular thread like structures bearing sporangia in rhizopus are-
- A.
Filaments
- B.
Hyphae
- C.
Rhizoids
- D.
Roots
- 11.Which of the following is not correct about tissue culture ?
- A.
Propagation through tissue culture can be carried through out the year
- B.
An embryo which normally dies can be made to form a new plant.
- C.
Large space is required for carrying out the method.
- D.
It is also called micropropagation.
- 12.Technique used for ornamental plants
- A.
Grafting
- B.
Layering
- C.
Tissue culture
- D.
None of these
- 13.Which of the following is not a feature of binary fission ?
- A.
It gives rise to two individuals.
- B.
A part of the body, covering residual cytoplasm is left unused.
- C.
Cytoplasm divides after each nuclear division
- D.
It occurs under favourable conditions
- 14.Why does bread mould fail to grow on dry slice of bread ?
- A.
It offers both nutrients and moisture to it
- B.
It does not offers moisture
- C.
It offers moisture but not nutrients
- D.
It offers nutrients but not moisture
- 15.Which of the following trait can be acquired but not inherited ?
- A.
Colour of eye
- B.
Nature of hair
- C.
Size of body
- D.
Colour of skin
- 16.A trait in an organism is influenced by
- A.
Paternal DNA
- B.
Maternal DNA
- C.
Both i and ii
- D.
None of these
- 17.Fission occasionally occurs in which of the following multicellular organism ?
- A.
Planaria
- B.
Hydra
- C.
Spirogyra
- D.
Green algae
- 18.Stock and scion are involved in artificial propagation called
- A.
Grafting
- B.
Tissue culture
- C.
Layering
- D.
Cutting
- 19.The two types of organisms which produce colonies by the process of budding are
- A.
Hydra and corals
- B.
Yeast and sponges
- C.
Corals and sponges
- D.
Hydra and yeast
- 20.______________have limited power of regeneration as development and differentiation is controlled by nervous and hormonal systems.
- A.
Higher animals
- B.
Lower animals
- C.
Sometimes lower animals
- D.
Both i and iii
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