Q13 of 60 Page 1

Name the parts A, Band C shown in the diagram and write their functions.

Part A- Stigma

Function- Stigma receives the pollen grains from the anther of stamen (during pollination).


Part B-Pollen tube


Function- it carries the pollen to the egg cell for fertilisation.


Part C-Ovule/germ cell.


Function- Ovule contains the female gamete of the plant which fuses with male gamete by the process of fertilization and forms zygote.


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10

Write the number of periods the Modem Periodic Table has. State the changes in valency and metallic character of elements as we move from left to right in a period. Also state the changes, if any, in the valency and atomic size of elements as we move down a group.

 12

Name the following:

(i) Thread like non-reproductive structures present in Rhizopus.


(ii) 'Blobs' that develop at the tips of the non-reproductive threads in Rhizopus.

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Explain how these structures protect themselves and what is the function of the structures released from the 'blobs' in Rhizopus.

 15

List in tabular form, two distinguishing features between the acquired traits and the inherited traits with one example of each.