Question

How are the invertebrates advanced from lower to higher invertebrates basing on their cellular composition and organization

Answer 1

Invertebrates are animals that neither possess nor develop a vertebral column(commonly known as a backbone or spine), derived from the notochord. This includes all animals apart from the subphylum Vertebrata. Familiar examples of invertebrates include insects; crabs, lobsters and their kin; snails, clams, octopuses and their kin; starfish, sea-urchins and their kin; jellyfish, and worms.


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Answer 2

Answer:

Independence Day is one of the most important days in the year for our country. ... United, the people of the country struggled to free itself from British rule for many years. We officially became independent on 15 August, 1947. To commemorate this historic event, we celebrate our independence on 15th August every year.