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Question
What is meant by multiple fission? Name one organism which reproduces by the process of multiple fission.
Solution
In multiple fission, the parent cell repeatedly divides to form innumerable organisms at the same time. Plasmodium reproduces by this method.
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RELATED QUESTIONS
Can you consider cell division as a type of reproduction in unicellular organisms? Give reason.
Vegetative propagation involves the growth and development of 'something' present in the old part of the plant to form a new plant. What is this 'something'?
What is a 'cutting' in respect of plants for propagation purposes?
The unicellular organism which reproduces by budding is :
(a) Spirogyra
(b) Hydra
(c) Planaria
(d) Yeast
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?
Fill in the blank:
Fungi, ferns and mosses reproduce by ____________________.
Rewrite the following statement by selecting the correct option.
When Hydra becomes matured, _________ takes place in it.
Draw a labelled diagram in proper sequence to show budding in hydra.
Find an odd one out.
Mustard was growing in two fields- A and B. While Field A produced brown coloured seeds, field B produced yellow coloured seeds.
It was observed that in field A, the offsprings showed only the parental trait for consecutive generations, whereas in field B, majority of the offsprings showed a variation in the progeny.
What are the probable reasons for these?
