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प्रश्न
Differentiate between the following:
Regeneration in lizard and Planaria
उत्तर
| Regeneration of Lizard | Regeneration of Planaria |
| If the tail of the lizard is cut and removed, a new tail will regenerate in damaged part. In lizard only the new tail is regenerated. | If a planarian worm get cut then each half regenerates the lost part resulting in two worms. In planaria, the cut removed part developed into an entire worm. |
संबंधित प्रश्न
Name two main processes of sexual reproduction
No two individuals are absolutely alike in a population. Why?
Define Juvenile phase,
Define Reproductive phase
The number of nuclei present in a zygote is ______.
Each sperm is a single cell.
A zygote is formed as a result of fertilisation.
Name the organ which produces female sex cells.
In which sort of reproduction are gametes involved?
Write the various steps involved in the sexual reproduction in plants.
Characters that are transmitted from parents to offspring during sexual reproduction show :
(a) only similarities with parents
(b) only variations with parents
(c) both similarities and variations with parents
(d) neither similarities nor variations with parents
The correct sequence of organs in the male reproductive system for the transport of sperms is:
(a) testis → vas deferens → urethra
(b) testis → ureter → urethra
(c) testis → urethra → ureter
(d) testis → vas deferens → ureter
Multiple choice question. Tick (✓) the correct choice:
Butterfly in its development from larva to an adult shows
- multiplication
- metamorphosis
- fertilisation
- none of the above
Describe the different methods of asexual reproduction in animals.
Adolesecence is considered a critical stage in the life of boys and girls. Explain this statement.
Describe the various stages in the life cycle of a butterfly.
How is the chromosome number maintained in sexually reproducing organisms?
Answer in one sentence.
Name the endocrine glands involved in maintaining the sex characteristics of males.
Which are the components of pollination?
What is parthenogenesis? Give two examples from animals
Animals giving birth to young ones: ______
Name the phenomenon where the female gamete directly develops into a new organism with an avian example.
Which organs/glands produce eggs and sperms?
Due to presence of which of the following chemical component, pollen grains can remain well preserved in fossil?
Choose the correct statements from the options below:
A few statements with regard to sexual reproduction are given below:
- Sexual reproduction does not always require two individuals
- Sexual reproduction generally involves gametic fusion
- Meiosis never occurs during sexual reproduction
- External fertilisation is a rule during sexual reproduction
Which of the following is a primary sex organ in a mammal?
______ fertilisation takes place in frogs and fish.
The zygote divides repeatedly into a group of cells, which develops into different tissues and organs constituting a full body. This structure is known as ______.
Animals in which an embryo develops outside the body are called ______ animals.
Explain the formation of the embryo.
