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प्रश्न
Choose the correct order of the stages of binary fission in Leishmania.
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| (I) | (II) | (III) | (IV) | (V) |
पर्याय
I, II, III, IV, V
I, III, II, V, IV
I, III, V, II, IV
I, II, III, V, IV
उत्तर
I, III, II, V, IV
Explanation:
In Leishmania binary fission occurs in a definite orientation:
- A constriction in the cell membrane first appears after nuclear division.
- Inwardly transversely from the centre of the dividing cell, the membrane expands.
- The cytoplasm divides into two equal pieces, each with a single nucleus
- The daughter cells can split off and create two new creatures.
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| (I) | (III) | (II) | (V) | (IV) |
संबंधित प्रश्न
The number of chromosomes in parents and offsprings of a particular species undergoing sexual reproduction remain constant due to:
Factors responsible for the rapid spread of bread mold on slices of bread are ______
(i) a large number of spores
(ii) availability of moisture and nutrients in bread
(iii) presence of tubular branched hyphae
(iv) formation of round shaped sporangia
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.
what are the kinds of reproduction?
Offspring formed as a result of sexual reproduction exhibit more variations because
Fungus, moss and fern reproduce by a common method of asexual reproduction. Name the method.
Differentiate between binary fission in Amoeba and binary fission in Leishmania.
Sexual reproduction in angiosperms leads to variation, which is for ______.
| 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?
Assertion (A): Most of the plants close their stomata at night.
Reason (R): Closing of stomata helps to conserve water as large amount of water evaporates from the leaves.
