Viva Voce: Binary Fission in Amoeba and Budding in Yeast | Lab Manuals for Class 10 PDF Download

Q.1. How many daughter cells are formed in binary fission?

Each binary fission produces two daughter cells.

Q.2. Are binary fission and budding faster processes of reproduction when compared to sexual reproduction? Justify.

Yes, binary fission and budding are faster because there is no gamete formation, fusion, fertilisation, embryo development and pregnancy period like in sexual reproduction.

Q.3. During binary fission, which division occurs first—nucleus or cytoplasmic?

Nucleus divides first, i.e. karyokinesis occurs first followed by cytoplasmic division.

Q.4. Apart from budding and binary fission, give two more methods of asexual reproduction.

Fragmentation and vegetative propagation.

Q.5. Yeast and Hydra, both reproduce by budding yet there is a difference. What is it?

Yeast is unicellular organism. The bud formed by budding may or may not detach from the parent body.
Hydra is multicellular, the bud appears as a branch and new organism separates from parent body, thus growing as an independent individual.

Q.6. What are the pseudopodia in Amoeba? What are the function of pseudopodia?

Pseudopodia (false feet) are the small, finger-like outgrowth that are present at one or more places on the body surface of Amoeba. The functions of pseudopodia include locomotion and the capturing of prey.

Q.7. You are given two slides, one with binary fission in Amoeba and one with budding in yeast. How would you identify which of the given slide is showing binary fission on the basis of the number of nuclei present?

The slide showing two nuclei in the centrally constricted organism is of binary fission in Amoeba, the other slide would be showing one nuclei in the parent cell body and another one in the bud, thus proving budding in yeast.

Q.8. Give example of a yeast used in food industry.

Saccharomyces cerevisiae is used in brewery industries.

Q.9. List a few advantages of asexual reproduction.

• Faster mode of reproduction.
• The offsprings produced are genetically identical to the parent.

Q.10. To prepare a temporary slide for binary fission in Amoeba, where will you look for sampling?

Freshwater ponds, lakes, etc.

Q.11. Organisms produced asexually and sexually. Which of them will survive better?

Sexually reproducing organisms have better survival rate.

Q.12. Amoeba is immortal at the edge of knife. Is it true?

Yes if we try to cut an Amoeba with a knife, the parts with nucleus will develop into a new organism but, the parts isolated without the nucleus will not survive. Thus, we can say that Amoeba is immortal at the edge of knife.

Q.13. Why binary fission and budding are included under asexual reproduction?

In both these processes, only one parent is involved in reproduction process. There is no formation and fusion of male and female gametes.

Q.14. Which type of cell division is involved in binary fission?

Amitosis