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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
What are chromosomes?
Define Reproductive phase
Higher organisms have resorted to sexual reproduction in spite of its complexity. Why?
Describe the process of fertilisation in human beings.
State the basic requirement for sexual reproduction?
Advantages of sexual reproduction.
Differentiate between Parthenocarpy and Parthenogenesis. Give one example of each.
Name the male and female gametes in animals.
Fill in the following blank with suitable word :
The cells involved in sexual reproduction are called .............
What are gametes?
State the advantages of sexual reproduction over asexual reproduction.
Give reason for the following:
The parents and off-springs of organisms reproducing sexually have the same number of chromosomes.
The number of chromosomes in parents and offsprings of a particular species remains constant due to :
(a) doubling of chromosomes after zygote formation
(b) halving of chromosomes during gamete formation
(c) doubling of chromosomes after gamete formation
(d) halving of chromosomes after gamete formation
Put a tick mark (✓) against the correct alternative in the following statement:
Amoeba is most commonly reproduced by:
Describe the various stages in the life cycle of a butterfly.
Identify the labels from the given diagram.
Choose the correct statement from the following:
Choose the correct statement from the following
Which organs/glands produce eggs and sperms?
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
Oestrus cycle is seen in ______.
Which of the following is a primary sex organ in a mammal?
Characters that are transmitted from parents to offspring during reproduction show ______
The eggshell protects the ______ from the outer environment.
What is external fertilisation?
Mention two inherent characteristics of Amoeba and yeast that enable them to reproduce asexually.
'Fertilisation is not an obligatory event for fruit production in certains plants'. Explain the statement.
Differentiate between oestrus and menstrual cycles. Cite an example for each type.
Explain how stability of the DNA of the species is ensured in sexually reproducing organisms.
