Q12 of 60 Page 1

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

Sporangia contain hundreds of minute spores enclosed in a spore case. When the spore case hurts, the tiny spores are dispersed in air. These spores are the asexual reproductive units which can produce more Rhizopus under suitable conditions. During unfavorable conditions these spores are protected by their thick walls until they find some favorable condition.


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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.

 13

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

 15

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