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प्रश्न
..................... type of reproduction occurs in Hydra.
(a) Binary fission
(b) Multiple fission
(c) Budding
(d) Fragmentation
_________________ type of reproduction takes place in Hydra.
(a) Budding
(b) Binary fission
(c) Multiple fission
(d) None of the above
उत्तर १
Budding type of reproduction occurs in Hydra
उत्तर २
Budding
Hydra uses regenerative cells for reproduction by budding.
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संबंधित प्रश्न
Explain the term “Regeneration” as used in relation to reproduction of organisms
Name the following : 'Blobs' that develop at the tips of the non-reproductive threads in Rhizopus.
Name the process by which an Amoeba reproduces. Draw the various stages of its reproduction in a proper sequence.
Name the artificial propagation method used for the propagation of rose plants
Can you consider cell division as a type of reproduction in unicellular organisms? Give reason.
Name one commonly used vegetable which is propagated by using tubers.
Explain how new Bryophyllum plants can be produced from the leaves of the old plant. Illustrate your answer with the help of a labelled diagram.
what is the name of the process by which Amoeba reproduces?
Describe the process of reproduction in Hydra with the help of labelled diagrams. What is the name of this process of reproduction?
Name the method by which bread mould (Rhizopus fungus) reproduces. Is this method sexual or asexual?
What care should be taken while making a cutting from a plant?
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
The unicellular organism which reproduces by budding is :
(a) Spirogyra
(b) Hydra
(c) Planaria
(d) Yeast
An animal which reproduces by the process of budding is :
(a) Plasmodium
(b) yeast
(c) Hydra
(d) Planaria
The cut part of plant stem (having roots and fixed to ground) which is used in the process of grafting is known as :
(a) stock
(b) scion
(c) cutting
(d) bud
When the branches of a plant growing in the field are pulled towards the ground and a part of them is covered with moist soil (leaving the tips of the branches exposed above the ground), then after some time new roots develop from the parts of branches buried in the soil. On cutting these branches from the parent plant, new plants are produced from the cut parts of branches which had developed roots.
(a) What is this method of propagation of plants known as?
(b) What type of branches should a plant have to be able to be propagated by this method?
(c) Name any two plants which are grown for their flowers and propagated by this method.
(d) Name any two plants which are grown for their fruits and propagated by this method
(e) Name one plant which gets propagated by this method naturally by forming runners (soft horizontal stems running above the ground).
A worm X found in freshwater and slow-moving streams has been accidently cut into three pieces. It was observed that in due course of time, each cut piece of the worm develops to become a complete worm by growing all the missing parts.
(a) Name the worm X which can exhibit this phenomenon of making complete worm from its cut body parts.
(b) Name another organism Y which possesses the same characteristic of growing fully from its cut body parts.
(c) What is the name of this process in which a complete organism is formed from its cut body part.
(d) State whether X and Y are unicellular and/or multicellular organisms.
(e) Can a dog be produced completely form its cut body part (say, a cut tail) just like organisms X and Y? Why?
Define the following:
Tissue culture
Mention the common method of reproduction in Ferns.
Mention the common method of reproduction in Strawberry.
Mention the common method of reproduction in Mango.
What happens when on maturation sporangia burst?
A student after observing a slide showing different stages of binary fission in Amoeba draws the following diagrams. However these diagrams are not in proper sequence:
The correct sequence is:
(A) I, V, IV, III, II
(B) I, III, IV, V, II
(C) I, V, III, IV, II
(D) I, IV, V, III, II
A blue colour flower plant denoted by BB is crossbred with that of white colour flower plant denoted by bb.
(a) State the colour of flower you would expect in their F1 generation plants.
(b) What must be the percentage of white flower plants in F2 generation if flowers of F1 plants are self-pollinated?
(c) State the expected ratio of the genotypes BB and Bb in the F2 progeny.
A student has to observe a permanent slide of binary fission in Amoeba. Find the correct sequence of steps given below for focussing the object under a microscope.
(a) Place the slide on the stage, look through the eye-piece and adjust the mirror to get proper illumination.
(b) Focus the slide sharp using fine adjustment screw
(c) Look through the eye-piece and raise the objective lens using coarse adjustment screw till the object is focussed.
(d) Look through the eye-piece and move the slide till the object is visible.
(A) d, c, b, a
(B) a, b, d, c
(C) a, d, c, b
(D) a, c, d, b
Write the correct option from the given multiple options.
Vegetative propagation is performed with the help of ..........................in sweet potato.
a) root
b) stem
c) leaf
d) flower.
Pranav and Preeti are twins in your class. They belong to ___________ twins type.
Name the mode of reproduction process seen in yeast.
Write four lines on the following: Budding
Write four lines on the following: Grafting
Give the name of the plant that reproduces vegetatively by: Grafting
Porogamy refers to entry of pollen tube through ____________.
Identify the type of reproduction from the following explanation and draw a neat and labelled diagram.
- The body of the parent organism breaks up into many fragments and each fragment starts to live as an independent new organism.
- Give two examples of living organisms which follow this type of reproduction method.
Seeds are the product of asexual reproduction.
In Rhizopus, tubular thread-like structures bearing sporangia at their tips are called ______
Which of the following statements are true for flowers?
- Flowers are always bisexual
- They are the sexual reproductive organs
- They are produced in all groups of plants
- After fertilisation they give rise to fruits
When you keep food items like bread and fruits outside for a long time, especially during the rainy season, you will observe a cottony growth on them.
What is this growth called?
When one of the following is correctly matched?
