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प्रश्न
A piece of wet bread or bhakri kept in a humid place for 2-3 days, then
- What will you observe?
- State the scientific name of the living organism and write its characteristics.
उत्तर
- If a piece of wet bread or bhakri kept in a humid place for 2-3 days, then filamentous fungi can be seen.
- Generally, fungi such as Mucor and Rhizopus are found on wet bread or bhakri.
Fungi like Mucor have a filamentous body. It has sporangia. Once the spores are formed, sporangia burst to release the spores. These spores germinate in moist and warm place and new fungal colonies are formed.
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संबंधित प्रश्न
For binary fission, Amoeba required .................... parent cells.
(a) Three
(b) Two
(c) One
(d) Zero
Draw labelled diagrams to illustrate budding in Hydra.
List any two modes of asexual reproduction in animals.Under which mode of reproduction is vegetative propagation placed and why?
What happens when On maturation sporangia of Rhizopus bursts?
Name the process by which an Amoeba reproduces. Draw the various stages of its reproduction in a proper sequence.
Name the asexual method of reproduction in Hydra
Explain why, more complex multicellular organisms cannot give rise to new organisms through regeneration.
What is meant by the term 'artificial propagation of plants'?
What care should be taken while making a cutting from a plant?
The disease kala-azar is caused by a micro-organism known as :
(a) Planaria
(b) Leech
(c) Leishmania
(d) Plasmodium
The factors responsible for the rapid spreading of bread mould on slices of bread are :
(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)
There are four tiny organisms A, B, C and D. The organism A is a parasitic protozoan which causes a disease known as kala-azar. The organism B is a microscopic single-celled animal which causes malaria disease in human beings. The organism C is a unicellular animal which can change its body shape according to need, it has no fixed shape. The organism D is also a unicellular animal which is slipper-shaped having a large number of tiny hair all around its body.
(a) Name the organisms A, B, C and D
(b) Name one characteristic body feature of organism A.
(c) Name the insect which carries organism B and transmits it from one person to another.
(d) What name is given to the asexual method of reproduction of (i) organism A, and (ii) organism B?
(e) Where do organisms C and D live?
Fill in the following blank with suitable word :
The process of fusion of gametes is called .............
Briefly explain why a gardener prefers to grow certain plants vegetatively?
Why is it disadvantageous to grow plants vegetatively?
Write a short note on Bryophyllum.
Differentiate between the following:
Cutting and grafting
Define the following:
Vegetative reproduction
Mention the common method of reproduction in Strawberry.
Mention the common method of reproduction in Bougainvillea.
Explain the process of binary fission in bacteria.
List two advantages of vegetative reproduction practiced in case of an orange plant.
After viewing different slides, a student draws following diagrams. Select the one which depicts binary fission in Amoeba:
(A) a
(B) b
(C) c
(D) d
Fill in the blanks and rewrite the completed statements:
___________ acid inhibits growth leading to wilting of leaves.
How is vegetative propagation economically important?
What is micropropagation?
How is micropropagation carried out?
Porogamy refers to entry of pollen tube through ____________.
Which of the following is not a type of asexual reproduction in multicellular organisms?
Yeast reproduces asexually by means of multiple fission.
Which of the following methods of asexual reproduction are observed in lower organisms?
The asexual reproduction in bacteria occurs by ______.
In Spirogyra, asexual reproduction takes place by
Vegetative propagation refers to formation of new plants from
Length of pollen tube depends on the distance between
Can you consider cell division as a type of reproduction in unicellular organism? Give one reason.
Name the asexual reproductive structure of Chlamydomonas.
