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Question
What determines whether the two organisms of a species will be exactly similar or not?
Solution
The similarity or difference between the organisms of a species depends upon whether these individuals are formed by sexual reproduction or asexual reproduction.
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RELATED QUESTIONS
Label the parts (1) and (2) in budding of yeast cell.
When you study a slide showing different stages of budding in yeast, you observe the following stages:-
I. The bud may get separated from the parent body and develop into a new individual.
II. The body of the bud develops and gives rise to another baby bud.
III. A bud comes out in any direction from the body of the parent cell.
IV. Thus they may form a colony.
The proper sequence of the above stages is
(A) II, I, III, IV
(B) II, III, I, IV
(C) III, II, l, IV
(D) III, I, II, IV
A student has to focus his compound microscope to observe a prepared slide showing different stages of binary fission in Amoeba. The steps he is likely to follow are listed below in a haphazard manner:
I. Adjust the diaphragm and the mirror of the microscope so that sufficient light may enter to illuminate the slide.
II. Fix the slide on the stage carefully.
III. Adjust the microscope to high power and focus.
IV. Adjust the microscope to low power and focus.
The correct sequence of the above steps to observe the slide under the microscope is
(A) I, II, IV, III
(B) II, I, IV, III
(C) II, IV, I, III
(D) I, IV, II, III
What is multiple fission?
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List any two modes of asexual reproduction in animals.Under which mode of reproduction is vegetative propagation placed and why?
How will an organism be benefited if it reproduces through spores?
Can you think of reasons why more complex organisms cannot give rise to new individuals through regeneration?
Name the asexual method of reproduction in Hydra
How does an Amoeba reproduce? Describe the process of reproduction in Amoeba with the help of labelled diagrams of different stages in its reproduction process.
Describe the process of reproduction in Hydra with the help of labelled diagrams. What is the name of this process of reproduction?
What is the difference between the cuttings method and grafting method for the artificial propagation of plants?
The factors responsible for the rapid spreading of bread mould on slices of bread are :
(i) presence of large number of spores in air
(ii) presence of large number of thread-like branched hyphae
(iii) presence of moisture and nutrients
(iv) formation of round shaped sporangia
(a) (i) and (iii)
(b) (ii) and (iv)
(c) (i) and (ii)
(d) (iii) and (iv)
A feature of reproduction that is common to Amoeba, Yeast and Bacterium is that :
(a) they are all multicellular
(b) they are all unicellular
(c) they reproduce only sexually
(d) they reproduce asexually
Vegetative propagation refers to the formation of new plants from the following existing organs of the old plants :
(a) stems, roots and flowers
(b) stems, roots and leaves
(c) stems, flowers and fruits
(d) stems, leaves and flowers
The two types of organisms which produce colonies by the process of budding are :
(a)Hydra and Corals
(b) Yeast and Sponges
(c) Corals and Sponges
(d) Hydra and Yeast
A tiny animal having tentacles which reproduces by growing buds on the sides of its body is :
(a) Planaria
(b) Yeast
(c) Amoeba
(d) Hydra
Fill in the blank:
Budding is a kind of _________ reproduction.
Define the following:
Tissue culture
Define the following:
Budding
Mention the common method of reproduction in Spirogyra.
Mention the common method of reproduction in Dahlia.
Mention the common method of reproduction in Potato.
What is fragmentation in organisms?
Describe regeneration in Planaria with the help of a suitable diagram.
Complete the following chart:
| Asexual reproduction | Sexual reproduction | ||
| 1. | Reproduction that occurs with the help of somatic cells is called as asexual reproduction. | 1. | ____________ |
| 2. | ____________ | 2. | Male and female parent are necessary for sexual reproduction. |
| 3. | This reproduction occurs with the help of mitosis only. | 3. | ____________ |
| 4 | ____________ | 4. | New individual formed by this method is genetically different from parents. |
| 5 | Asexual reproduction occurs in different individuals by various methods like binary fission, multiple fission, budding, fragmentation, regeneration, vegetative propagation, spore production, etc. | 5. | ____________ |
Fill in the blanks and rewrite the completed statements:
___________ acid inhibits growth leading to wilting of leaves.
Which of the following is a mode of asexual reproduction?
In hydra the type of reproduction is ___________.
Why is chemical communication better than electrical impulses as a means of communication between cells in a multi-cellular organism?
Name two flowering plants that reproduce both by seeds and by vegetative means.
Give the name of the plant that reproduces vegetatively by: Bulbils
Name any one plant in which double fertilization was discovered?
Vegetative propagation by leaves takes place in ______.
The asexual reproduction in bacteria occurs by ______.
Budding, in hydra, is a form of ______.
In Spirogyra, asexual reproduction takes place by
Mustard was growing in two fields- A and B. While Field A produced brown coloured seeds, field B produced yellow coloured seeds.
It was observed that in field A, the offsprings showed only the parental trait for consecutive generations, whereas in field B, majority of the offsprings showed a variation in the progeny.
What are the probable reasons for these?
When one of the following is correctly matched?
Explain with the help of a labelled diagram, the process of reproduction in Hydra by budding. Name the cells used for reproduction in this process.
