Rohit collected some pond water which was dark green in colour in a test tube. He took out green-coloured mass from it and separated its filaments by using needles. He broke some filaments into small fragments and put them in a Petri dish containing clean water. He observed that after a few days the small fragments gave rise to complete filaments. a a. Name any 2 organisms that reproduce by this means. b. Differentiate between fragmentation and regeneration. c. The above kind of reproduction is not true for all multi-cellular organisms. Why? Or What is the basic strategy used in multi-cellular organisms for reproduction?
Answers
Answer:
planaria
hydra
- fragmentation means to divide into smaller Parts and each part is called fragmentation
Answer:
(a) Planaria, sea anemone
(b) An organism fractures into several pieces or smaller versions of itself during asexual reproduction. Each fragment causes the development of a unique, autonomous organism that is a clone of the parent organism. Certain plants, fungi, sea stars, and annelid worms all display fragmentation, which is the outcome of an organism severing its connection to another creature. On the other hand On the other hand, regeneration is the process of tissues in an organism that have been damaged partially or completely regrowing. This indicates that if an organism is divided into numerous sections, each portion will revert to its original state.
In certain companies, specific stem cells are in charge of performing this operation. House lizards' ability to regenerate after losing their tail is a typical illustration of the process.
(c)This is due to the following reasons:
- No multicellular creature can simply divide cell by cell.
- They have a large number of specialized cells arranged as tissues and organs
- They require complicated reproductive methods
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