Introduction

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Hello everyone,
            Welcome to Bioniac. In this blog, we are going to discuss about biology books in details. Stay tuned for more updates :)

Toodles 👋🏻

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ANIMAL KINGDOM Part-2, NCERT Class-11

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Symmetry • Asymmetrical: Any plane that passes through the center doesn't divide the following organism into two equal half e.g. sponges • Radial Symmetry: Any plane that passes through the central axis of the body divides the following organism into two equal halves e.g.   Coelenterates , Ctenophores, Adult Echinoderms      Radial Symmetry( Hydra sp. ) • Bilateral Symmetry: The body of the following organism can be divided into two equal halves if and only if the cutting plane pass through in a particular way through central axis e.g. Annelids , Arthropods etc. Bilateral Symmetry( Brachyura sp.) Click  Here  for part 1 of this chapter
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ANIMAL KINGDOM Part-9, NCERT Class-11

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Phylum - Ctenophora • Commonly known as Sea - walnut   or Comb - Jellies . • Ctenophores are exclusively  marine •  Radially   Symmetrical,   Diploblastic . • Ctenophores exhibit Tissue   level   of body organisation. • Their body possess eight    external rows of ciliated COMB   PLATE   (Hepls in Locomotion ) • Intracellular   and Extracellular   digestion seen. • Ctenophora phylum's well marked property is BIOLUMINESCENCE   (Living organism's light emitting feature) • Hermaphrodite   • Reproduction in only sexual   mode • External   fertilization with Indirect   development. Example: •  Pleurobrachia •  Ctenoplana
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ANIMAL KINGDOM Part-4, NCERT Class-11

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Coelom Def.- Coelom is a cavity present between body wall and gut wall. It is lined by mesoderm      In the basis of presence and type of coelom, animals are classified into 3 types 1) Acoelomates: The animals in which body cavity is absent os called acoelomate e.g. Platyhelminthes 2)Pseudocoelomates: In some animals, body cavity is not lined by mesoderm. Instead, the mesoderm is present as scattered pouches in between ectoderm and endoderm. Such body cavity is called pseudocoelom and such the animals possessing them is called pseudocoelomate e.g. Aschelminthes  3)Coelomate: Animals that possess a body cavity lined by mesoderm are known as coelomate e.g. Annelids to Chordates Types of animal on the basis of coelom structure a)Coelomate b)Pseudocoelomate c)Acoelomate
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