Bsc first year

 ="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-4524206540672702"      crossorigin="anonymous"></script> Protozoa may be defined as microscopic and acellular animalcules, without tissues and organs, having one or more nuclei, but no nucleus ever incharge of a specialized part of cytoplasm . प्रोटोजोआलाई माइक्रोस्कोपिक र सेल्युलर एनिमलको रूपमा परिभाषित गर्न सकिन्छ, ऊतक र अंगहरू बिना, एक वा बढी केन्द्रकहरू छन्, तर साइटोप्लाज्मको विशेष भागमा कुनै पनि केन्द्रक कहिल्यै इन्चार्ज हुँदैन। https://youtube.com/clip/UgkxEcUG4Fo4TJq_uiZ0HkhBhZt2GKFIRUyo General  characterers of protozoa 1.  Small , usually microscopic animalcules, ordinarily not visible without microscope. 2. Simplest and most primitive of all animalls,with protoplasmic grade of organization. 3. Body unicellular , containing one or more nuclie which are monomorphic or dimorphic. 4. Solitary or forming loose colonies in which individuals remain alike and independ...

  https://dhurba123.blogspot.com/2022/06/bryophytes.html <script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-4524206540672702" crossorigin="anonymous"></script>                    Bryophytes The fossil record indicates that bryophytes evolved on earth about 395_430 million years ago(during silurian period of paleozoic era) . The study of bryophytes is called bryology. Hedwig is the father of bryology. Small non vascular plants , such as mosses, liverworts, hornworts. They play vital role in regulating ecosystems because they provide an important buffer system for other plants.  Bryophytes are called amphibians plants because they are terrestrial plants, but they require water to complete their life cycle at the time of sexual reproduction . General characteristics of bryophytes * plants occur in damp and shady areas. * the main plant body is thallus * it is attached ...