Good morning students.
So, Day 1 concluded. We entered Animal Kingdom and trying to explore their amazing world. To summarize day 1 contents, we had a discussion on need for classification and the basis for classification.
1. Levels of structural organization: - Cellular (Porifera) - Tissue (Coelenterata and Ctenophora) - Organ (Platyhelminthes) - Organ System (all other phyla)
2. Body Symmetry: Radial Symmetry (Coelenterata, Ctenophora and adult Starfish) and Bilaterial Symmetry (all triploblasts and larval forms of snail and starfish)
*** adult Snail is asymmetrical while adult Star fish exhibits pentamerous radial symmetry.
3. No. of germinal layers: - Diploblasts (Coelenterata and Ctenophora) and Triploblasts (Platyhelminthes to Chordata).
you can find below the link to the chapter 'ANIMAL KINGDOM' from NCERT I PU Biology Textbook.
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