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25. Model Question Paper
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Q16 of 34 Page 160

Identify the phylum in which adults exhibit radial symmetry and larva exhibit bilateral symmetry.

The phylum exhibiting the said criteria is the phylum Echinodermata. These are invertebrate that are characetrised by having a hard and spiny covering. The adults show radial symmetry while the larva exhibit bilateral symmetry.



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Mary is about to face an interview. But during the first five minutes before the interview she experiences sweating, increased rate of heart beat, respiration etc. Which hormone is responsible for her restlessness?

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Suppose you accidentally find an old preserved permanent slide without a label. In your effort to identify it, you place the slide under microscope and observe the following features :-

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17

Identify the sex of a frog in which sound producing vocal sacs are present.

18

What is the feature of a metacentric chromosome?

Questions · 34
25. Model Question Paper
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