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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
Describe briefly how regeneration is carried out in multicellular organisms like Hydra.
How does multiple fission occur in an organism? Explain briefly.
Name one organism which exhibits multiple fission type of reproduction.
Explain the process of regeneration in Planaria.
Identify the figures showing the process of budding in yeast.
(A) I, II and III
(B) II, III and IV
(C) I, II and IV
(D) III, IV and I
How will an organism be benefited if it reproduces through spores?
Draw in sequence (showing the four stages), the process of binary fission in Amoeba.
Most of the plants reproduce by sexual method. Name two plants which can reproduce asexually.
Name the asexual method of reproduction in Plasmodium.
Fill in the following blanks with suitable words :
Plasmodium reproduces by the process of ............ fission whereas Paramecium reproduces by the process of ......... fission.
Fill in the following blank with suitable word :
Vegetative reproduction of potato plants is done by using ............
What is meant by the term 'artificial propagation of plants'?
Name two plants which are usually propagated by artificial propagation methods. Name the method of artificial propagation used in each case.
What is meant by the term 'fission' as used in biology?
Name one unicellular organism which reproduces by the same asexual process as Hydra.
Name the method by which bread mould (Rhizopus fungus) reproduces. Is this method sexual or asexual?
The micro-organism which reproduces by multiple fission is the one which causes the disease known as :
(a) Kala-azar
(b) marasmus
(c) malaria
(d) amoebiasis
One of the following organisms does not reproduce by fission. This is :
(a) Amoeba
(b) Leishmania
(c) Planaria
(d) Plasmodium
Binary fission describes the type of reproduction where the organism divides to form :
(a) many spores
(b) two daughters
(c) many buds
(d) two hyphae
An organism having a whip-like structure at one end which reproduces by the process of binary fission is :
(a) Hydra
(b) Paramecium
(c) Leishmania
(d) Plasmodium
An organism which can reproduce 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) Bryophyllum
(c) Hydra
(d) Sea anemone
Fill in the blank:
The amount of cytoplasm in the parent cell is _____ than the amount in the bud.
State whether the following statement is true (T) or false (F):
Reproduction by spores is a method of asexual reproduction.
Define the following:
Budding
Mention the common method of reproduction in Potato.
Mention the common method of reproduction in Strawberry.
What is vegetative propagation? List with brief explanation three advantages of practising this process for growing some types of plants. Select two plants from the following which are grown by this process:
Banana, Wheat, Mustard, Jasmine, Gram.
A student was given two permanent slides, one of binary fission in Amoeba and other of budding in yeast. He was asked to identify any one difference in the nucleus of the two. One such difference, he identified correctly was
(1) Presence of one nucleus in Amoeba, two in yeast cell and one in bud.
(2) Presence of two nuclei in centrally constricted Amoeba, one in yeast cell and one in its bud.
(3) Presence of two distant nuclei in Amoeba, one in yeast cell and two in bud.
(4) Presence of a single nucleus each in Amoeba, yeast cell and its attached bud.
Gemmule formation takes place in ________.
In hydra the type of reproduction is ___________.
Rewrite the following statement by selecting the correct option.
When Hydra becomes matured, _________ takes place in it.
Write four lines on the following: Grafting
How is vegetative propagation economically important?
Why anther is called as tetrasporangiate structure?
Distinguish between the following.
Binary fission and Multiple fission
Which of the following statements is/are true for sexual reproduction in plants?
(i) Plants are obtained from seeds.
(ii) Two plants are always essential.
(iii) Fertilisation can occur only after pollination.
(iv) Only insects are agents of pollination.
Choose from the options given below.
Rajesh observed a patch of greenish black powdery mass on a stale piece of bread.
Name the organism responsible for this and its specific mode of asexual reproduction.
