92- usually SNUCU figure A 92. Which is the correct match of indicating points (A, B, C) with the given events regarding following diagram. I mitotic division start, holoblastic (1) B cleavage along with synthesis phase II meiosis complete which was arrested (2) A in metaphase-II II meiosis complete and formation of (3) A haploid zygote. Implantation occurs in morula stage. (4) C dinlogist and you heard 'LUB-DUB' TC

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Given below is a diagram representing a stage during mitotic cell division in an animal cell. Examine it carefully and answer the question which follow.
(e) Mention two points of difference between mitosis and meiosis with regard to:
(i) The number of daughter cells produced.
(ii)The chromosome number in the daughter cells.

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(i) Draw a neat labelled diagram to show the metaphase stage of mitosis in an animal cell having six chromosomes.

(ii) How many daughter cells are formed at the end of mitosis and at the end of meiosis?

(iii) With reference to cell division, explain the following terms – Chromatid, Centromere, Haploid.

(iv) Name the type of cell division that occurs during -

1. Growth of shoot

2. Formation of Pollen grains

3. Repair of worn out tissues.

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Answer the following (Any Five)

1. We are Crocodile & Alligator.
a) To which phylum we belong to?
b) In which three sections our body is divided?
c) We can’t breathe in water, why?

2.What are the meanings of symbols A, B, C shown in the figure with respect to environment?

3. Sketch the labelled diagrams.
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b. Human female reproductive system.

4. What are the advantages of hydroelectric power generation?

5. Observe the diagrams and answer the following questions.

(a) Which peculiarity do you observe in the figure of Metaphase-I of meiosis ?
(b) What is the important difference between Telophase-I and Telophase-II of meiosis?
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7.Complete the paragraph by choosing the appropriate words given in the brackets:
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……….. is just like mitosis. In this stage, the two haploid daughter cells formed in ……… undergo division by separation of recombined sister chromatids and four ……….. daughter cells are formed. Process of …………… production and spore formation occurs by meiosis. In this type of cell division, four haploid (n) daughter cells are formed from one ……….. cell. During this cell division, ………… occurs between, the homologous chromosomes.

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Observe the diagrams and answer the following questions.
(a) Which peculiarity do you observe in the figure of Metaphase-I of meiosis?

(b) What is the important difference between Telophase-I and Telophase-II of meiosis?

(c) Which figure shows phenomena of crossing over?

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Complete the paragraph by choosing the appropriate words given in the brackets: (3 marks)

(gamete, crossing over, haploid, Meiosis-II, meiosis-I, diploid)

……….. is just like mitosis. In this stage, the two haploid daughter cells formed in ……… undergo division by separation of recombined sister chromatids and four ……….. daughter cells are formed. Process of …………… production and spore formation occurs by meiosis. In this type of cell division, four haploid (n) daughter cells are formed from one ……….. cell. During this cell division, ………… occurs between, the homologous chromosomes.

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