Advertisements
Advertisements
Question
Differentiate between the following:
Regeneration in lizard and Planaria
Solution
| 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. |
RELATED QUESTIONS
Complete the following table to get the differences between asexual and sexual reproduction:
| Characteristics | Asexual Reproduction | Sexual Reproduction |
| Number of parents involved | ........................... | .............................. |
| Type of cells involved | Somatic cells | Germ cells |
| Type of cell division | ............................ | Meiosis and mitosis |
What is the effect of DNA copying, which is not perfectly accurate, on the reproduction process? How does the amount of DNA remain constant though each new generation is a combination of DNA copies of two individuals?
Describe the process of fertilisation in human beings.
Oviparous animals give birth to young ones.
Give two differences between a zygote and a foetus.
In which female reproductive organ does the embryo get embedded?
What is the other name of sex cells?
name the organ which produces male sex cells.
Write the various steps involved in the sexual reproduction in plants.
Distinguish between a gamete and a zygote.
The figure given alongside shows the human male reproductive organs. Which structures make sperms and seminal fluid?
(a) V makes sperms and X makes seminal fluid
(b) W makes sperms and Y makes seminal fluid
(c) X makes sperms and W makes seminal fluid
(d) Y makes sperms and V makes seminal fluid
Put a tick mark (✓) against the correct alternative in the following statement:
Which one of the following represents the correct sequence in the life history of a butterfly ?
- Egg → Larva → Adult → Pupa
- Egg → Pupa → Adult → Larva
- Egg → Larva → Pupa → Adult
- Egg → Pupa → Larva → Adult
Multiple choice question. Tick (✓) the correct choice:
Butterfly in its development from larva to an adult shows
- multiplication
- metamorphosis
- fertilisation
- none of the above
Define the term Metamorphosis.
Mention the common method of reproduction in Flatworm.
“The chromosomes number of the sexually reproducing parents and their offspring is the same.” Justify this statement.
Explain why variations are observed in the offsprings of sexually reproducing organisms?
Explain the histological structure of testis.
Answer the following question.
Explain the histological structure of ovary in human.
Describe the histology of testis with help of labelled diagram.
What is parthenogenesis? Give two examples from animals
Give reason for the following:
Some organisms like honey bees are called parthenogenetic animals
Give reason for the following:
A male honey bee has 16 chromosomes whereas a female has 32 chromosomes.
Name the phenomenon where the female gamete directly develops into a new organism with an avian example.
The end of vegetative phase in plants which marks the beginning of the reproductive phase can be easily seen in the higher plants when they come to ______.
The eggshell protects the ______ from the outer environment.
'Fertilisation is not an obligatory event for fruit production in certains plants'. Explain the statement.
