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What is the function of calyx?
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The figure below shows the concept of double fertilization. Complete the flow chart showing the progress at each step:

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Triple fusion involves ______.
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Type of sexual reproduction is ______.
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Example of phylum Arthropoda is ______.
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Read the following statement and justify same in your own words with the help of suitable example.
Geographical and reproductive isolation of organisms gradually leads to speciation.
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Sketch, labell and classify Octopus.
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My body is soft and slimy, hence I am referred as ____________.
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Which of the following animals has a hard calcareous shell?
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Arthropoda : Largest phylum : : Mollusca : ______________
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What is species and speciation?
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In which class, animals have soft body?
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Identify me.
My body is radially symmetrical. Water vascular system is present in my body. I am referred as fish though I am not. What is my name?
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Answer in brief.
Write four distinguishing characters of phylum- Echinodermata.
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Answer the question by choosing correct option.
Which of the following animals can regenerate it’s broken body part?
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Sketch, labell and classify Star fish .
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Identify the class of the animal shown in the figure and write any two characteristics.
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Find an odd one out.
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Locomotion of starfish takes place through pseudopodia.
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What are the locomotory organs of the animal given in the picture?

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