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प्रश्न
How are the modes for reproduction different in unicellular and multicellular organisms?
उत्तर
In unicellular organisms, reproduction occurs by the division of the entire cell. The modes of reproduction in unicellular organisms can be fission, budding, etc. whereas in multicellular organisms, specialised reproductive organs are present. Therefore, they can reproduce by complex reproductive methods such as vegetative propagation, spore formation, etc. In more complex multicellular organisms, such as human beings, the mode of reproduction is sexual reproduction.
संबंधित प्रश्न
Yeast reproduces by _________.
(a) spore formation
(b) multiple fission
(c) fragmentation
(d) budding
Explain the term “Regeneration” as used in relation to reproduction of organisms
Draw a labelled diagram to show that particular stage of binary fission in amoeba in which its nucleus elongates and divide into two and a constriction appears in its cell membrane.
Name the type of asexual reproduction in which two individuals are formed from a single parent and the parental identity is lost. Draw the initial and the final stages of this type of reproduction. State the event with which this reproduction starts.
How does Planaria reproduce? Is this method sexual or asexual?
State whether the following statement is true or false :
Spores produced by the bread mould plant are actually its seeds.
which can be grown from their leaves.
Name any two plants which are propagated by cuttings method.
Fill in the following blank with suitable word :
Strawberry plants are propagated by the natural............... method.
The disease kala-azar is caused by a micro-organism known as :
(a) Planaria
(b) Leech
(c) Leishmania
(d) Plasmodium
What is vegetative reproduction?
With the help of suitable diagram, describe Binary fission in plants.
Fill in the blank:
Yeast cells reproduce by ________.
Mention the common method of reproduction in Potato.
Mention the common method of reproduction in Mango.
A yeast cell in which budding occurs was seen to have:
(1) one bud cell
(2) two bud cell
(3) three bud cell
(4) a chain of bud cells
Fill in the blanks and rewrite the completed statements:
___________ acid inhibits growth leading to wilting of leaves.
Match the columns:
| Column A (Asexual) | Column B (Examples) | ||
| (a) | Spore formation | (1) | Spirogyra |
| (b) | Conidia formation | (2) | Yeast |
| (c) | Fragmentation | (3) | Chlamydomonas |
| (d) | Budding | (4) | Penicillium |
