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प्रश्न
Choose the odd one out and name the category to which it belongs.
Centrosome, Cell wall, Cell membrane, Large Vacuole.
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उत्तर
Centrosome
Explanation:
The cell wall, cell membrane, and large vacuole are all characteristic structures found in plant cells. The centrosome is the odd one out because it is exclusively found in animal cells, where it initiates and regulates cell division by forming spindle fibres. Plant cells lack centrosomes and instead form spindle fibres using polar caps during division.
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संबंधित प्रश्न
What are genes?
Match the events given in column A with the phase in mitotic cell division in column B.
| Column ‘A’ | Column ‘B’ | ||
| 1. | Chromosomes get arranged in a horizontal plane at the equator. |
a. | Anaphase |
| 2. | Daughter chromosomes move to the opposite poles of a spindle |
b. | Prophase |
| 3. | Chromosomes become visible as fine, long threads. |
c. | Telophase |
| 4. | Chromosomes lose their distinctiveness and gradually become transformed into a chromatin network. |
d. | Metaphase |
Choose the correct answer:
Chromosomes appear at equator in ____________
What is the importance of meiosis in creating variations?
State how does meiosis maintains chromosome number in a species.
Differentiate between
Gametic meiosis and Zygotic meiosis.
Explain the Term Centrioles
Name the following:
The part of the cell associated with heredity.
Give Technical Terms
The phase of meiosis at which homologous chromosomes are separated.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Chromosomes other than sex-chromosomes are autonomous.
Give Reason:
The Law of independent assortment holds good for the gene pairs that occur in different pairs of chromosomes.
Write the functional activity of the following structure:
Chromosomes
Multiple Choice Question
Chromosomal aberrations are caused by:
Define euploidy.
The loss of one or more chromosomes in ploidy is called ______.
What' does 'P' and 'Q' represent in the following diagram of X and Y chromosomes? Select the correct option representing, its appropriate description.
Which of the following type of chromosomes has only one telomere?
After a mitotic cell division, a human female cell will have ______.
The two non-sister chromatids of a paired chromosome are attached to each other at ______ during the process of crossing over.
In the human male, a sperm contains autosomes and ______.
