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प्रश्न
Differentiate between binary fission in Amoeba and binary fission in Leishmania.
उत्तर
| Amoeba | Leishmania |
| 1. Amoebas use binary fission for asexual reproduction. A single amoeba is divided into two comparable daughter cells during this phase of reproduction. As it enlarges, the amoeba's single nucleus separates into two nuclei. The single parent creates the amoeba. | 1. The formation of a constriction in the cell membrane happens during nuclear division in Leishmania. The centre of the dividing cell is when the membrane begins to expand transversely and inward. The cytoplasm divides into two equal pieces, each with a single nucleus. It's possible for the daughter cells to split apart and create two new Somemiense. |
| 2. In Amoeba, the splitting of the two cells during division can take place in any plane. | 2. Leishmania (which causes kala-azar), which have a whip-like structure at one end of the cell. In such organisms, binary fission occurs in a definite orientation in relation to this structure. |
संबंधित प्रश्न
State the main difference between asexual and sexual reproduction.
What would be the chromosome number of resulting cells when a microspore mother cell with 40 chromosomes undergoes meiosis?
In the following Question, the Assertion, and Reason have been put forward. Read the statements carefully and choose the correct alternative from the following
Assertion: In human beings, the female. play a major role in determining the sex of the offspring.
Reason: Women have two X chromosomes.
The ability of a cell to divide into several cells during reproduction in Plasmodium is called
Distinguish between a gamete and zygote. Explain their roles in sexual reproduction.
Which of the following parts of a plant take part in sexual reproduction?
(i) Flower
(ii) Seed
(iii) Fruit
(iv) Branch
Choose the correct answer from below.
Lila observed that a pond with clear water was covered up with a green alga within a week. By which method of reproduction did the algae spread so rapidly?
Fungus, moss and fern reproduce by a common method of asexual reproduction. Name the method.
One morning as Paheli strolled in her garden she noticed many small plants which were not there a week ago. She wondered where they had come from as nobody had planted them there. Explain the reason for the growth of these plants.
| The most obvious outcome of the reproduction process is the generation of individuals of similar design, but in sexual reproduction they may not be exactly alike. The resemblances as well as differences are marked. The rules of heredity determine the process by which traits and characteristics are reliably inherited. Many experiments have been done to study the rules of inheritance. |
- Why an offspring of human being is not a true copy of his parents in sexual reproduction?
- While performing experiments on inheritance in plants, what is the difference between F1 and F2 generation?
- (A) Why do we say that variations are useful for the survival of a species over time?
OR
(B) Study Mendel's cross between two plants with a pair of contrasting characters.
RRYY × rryy Round Yellow Wrinkled Green He observed 4 types of combinations in F2 generation. Which of these were new combinations? Why do new features which are not present in the parents, appear in F2 generation?
