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The cells of the embryo undergo repeated...

The cells of the embryo undergo repeated meiotic divisions.

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The cells are specialised cells that give rise to all other types of cells present in multicellular organisms.
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Fill in the blanks by selecting the correct word from the bracket and complete the given paragraph . ( semen, external, placenta,urinogenital duct, oviduct, ovum , internal, sperm,zygote, embryo) "_______" is ejaculated in vagina and passes to uterus and then to "___________" . In humans, fertilization is "________________" . In fertilization, "______________" is formed by fusion of "______________" and ovum and then it undergoes repeated mitotic divisions to form "______________" .

Gametes are formed by meiotic division.

Define cell division.

Starting from megaspore mother cell, how many meiotic and mitotic divisions are reuired for formation of female gametophyte

Two types of cell division

A cell has 32 chromosomes. It undergoes mitotic division. What will be the chromosome number (N) during metaphase? What would be the DNA content (C ) during anaphase?

Name the different cells of the Embryo sac of Angiosperms and state their role.

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.................is the longest phase of meiotic division.

TARGET PUBLICATION-CELL BIOLOGY AND BIOTECHNOLOGY -True or False. If false, write the correct sentence
  1. Stem cell research is the revolutionary event in biotechnology after c...

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  2. Stem cells are present in the blastocyst stage of embryonic developmen...

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  3. The cells of the embryo undergo repeated meiotic divisions.

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  4. Embryonic cells before differentiation are called embryonic stem cells...

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  5. Adult stem cells can be obtained from blood.

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  6. Different types of cells give rise to specialised stem cells in multic...

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  7. Changes in genes of the cells are brought about in non-genetic techniq...

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  8. Human growth hormone can be produced by genetically modified bacteria.

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  9. To produce Bt cotton, the gene responsible for toxin production is iso...

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  10. Gene from Bacillus thuringiensis is introduced into soybean.

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  11. Golden rice produces around 23· times more amount of beta carotene.

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  12. Methods like artificial insemination and embryo transplant are mainly ...

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  13. Escherichia coli is used for the production of interferons.

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  14. The vaccines produced using biotechnology are not thermo-stable.

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  15. All cells of the body except sperm and ova are called germ cells.

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  16. Pteris vittata, alfalfa, clover, and rye are plants used for phytoreme...

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  17. Oil digesting and fast multiplying bacteria can be used to clean oil s...

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  18. Dr. Norman Borlaug (USA) and Dr. M. S. Swaminathan (India) have valuab...

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  19. Government of India has encouraged the people of pisciculture for impr...

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  20. Manures can be used to improve water holding capacity of the soil.

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