Biology Blogs For Class11th, 12th and NEET

                                            Sheet 1 What do you mean by spermetogenesis ? explain the whole process of Spermetogenesis . Describe oogenesis . Explain the process of megasporogenesis ?                Write about the structure of pollen . What is sporopollenin ? What do you mean by bio fortification ?  WIDAL test is used for which disease , explain ? What do you mean by drugs ? Explain any two type of drugs . Write the definition of pollution ? What is SCP ? Write difference between inbreeding and out breeding ? What is Asexual type of Reproduction ? Explain food Chain ? What is  the difference between convergent and divergent evolution ? Explain secondary treatment of sewage purification ?

                                           Octopus  Classification -                                                  Kingdom - Animalia Phylum - Mollusca Class-   Cephalopoda Order - Octopoda   Sub- order -  Incirrinus Genus - Octopus  Commonly name - Devil fish or Octopus . Habitat -   They live in depth of shallow and coastal water . General Feature -      They are  soft bodied , eight limbed , marine animals .     They follow radial symmetry .     Octopus are unisexual .    Octopus has three chambered closed circulatory system .    Octopus has highly complex nervous system with a central brain and large number of ganglion  .     They  do not have any skeleton in their body ; only muscles are present in whole body .     Octopus contain venom  which is used to inject the prey for making them immobilize . The venom they injected is so powerful that it  kill the person in less than 30 minute .      They are carnivores .     They can camouflage themselv

                                        Hemichordata  Hemichordata is a marine animal distributing in all over the world named by Delle Chiaje in 1829. The word Hemichordata is coming from the Greek word Hemi means half and Chordae means string. About 90 species of it have been described by scientists till now. Classification of Hemichordata - Kingdom - Animalia Phylum - Hemichordata                          class-  Enteropneusta and pterobranchia Higher classification - Deuterostome Commonly name - Acorn  worms Habitat - Hemichordata is a marine invertebrate living in the depth of solid substratum like under rocks, in the mud. General Feature -  Hemichordata has some features of the chordate family. They follow bilateral symmetry .  The body is divided into three portions -  collar, trunk, and proboscis lobe.  Reproduction in Hemichordata is of sexual type . The glomerulus is present in the form of an excretory organ.  They have an open circulatory

                                      Obelia Life Cycle Obelia is named after a Greek word, "obelus," which means "a loaf on a spit." These are marine creatures that live in shallow coastal waters. They attach to the ocean floor, growing upward like a furry plant, which is why they're sometimes called " Sea fur" or "hydrozoites ." Obelia goes through three important life phases: polyp, blastostyles, and medusa Classification of Obelia  - Kingdom - Animalia Phylum - Cnidaria                                  Class - Hydrozoa Order - Leptothecata Family - Campunurlariidae Genus - Obelia General Feature -   Obelia is generally  marine and colonial  animals. They are cosmopolitan in nature. They have tissue but lacks the organ systems. Thus, they have a tissue level of organization.    They show  radial symmetry .    They are diploblastic in nature, the outer wall is called ectodermis and the inner one is called gastrodermis . Betwe

                                            Wild Life Conservation We live in a cutting-edge world where science is advancing daily. Whether it is the sector of telecommunications or medical diagnosis, every field has developed in its own manner, but our nature is vanishing every day. We are unable to view the same wildlife and vegetation that we did as children. Slowly but surely, all species are beginning to vanish, and human exploitation is to blame. Therefore, it is crucial to preserve the wildlife so that our children might enjoy the benefits of nature as well. Through a number of wildlife management initiatives, our government protects them. There are two ways for conserving wild life animals – Exsitu Conservation  - In this method of conservation, both biotic and abiotic biodiversity components can be maintained and protected outside of their natural habitats, such as by in vitro production of plant or animal specimens. Some  example of these are: ·     

    Vitamins are those organic compounds that are recommended in a very short amount in diet however their deficiency turns into a  specific disease.  The term “Vitamine” was coined from the word vital + amine since the earlier identified compounds had amino groups. Later work showed that most of them did not contain amino groups, so the letter ‘e’ was dropped and the term vitamin is used these days.  They are generally present in our food which we have taken for nutrition. · Maximum vitamins cannot be synthesized in our body on the other hand plants can synthesize almost all of them, so they are considered to be an essential food factor. · In our body, some of the vitamins which we are needed are secreted by the bacteria of the gut. ·  Different vitamins belong to various chemical classes. · A  small amount of vitamins used to perform specific biological functions in our body like the growth and health of the organism. · Vitamins are nominated