Please select a subject first
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Observe the picture and answer the following questions.

- The given picture indicates which principle?
- Explain that principle in your language.
- What is the meaning of acquired characteristics?
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Draw a neat and labelled diagram.
Double fertilization in angiosperms
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Explain the sexual reproduction process in plants with a diagram.
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Observe the figure below. Write functions of the labelled parts.

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Give a scientific reason.
Cockroach belongs to phylum Arthropoda.
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Sketch and label the essential and accessory whorls of flower.
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Give any two examples of agents of pollination.
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Identify my class/phylum and give one example of it:
We form the highest number of animals on the planet. We have bilateral symmetry and our exoskeleton is in the form of chitin.
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In a plant flower the female whorl is ______.
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Write the correct co-relation.
Butterfly : Arthropoda : : Earthworm : ______.
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Observe the following figure and explain the concept.

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What is the structural unit of sexual reproduction in plant?
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What are the agents for pollination?
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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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