Biological classification By KHUSHBOO GUPTA
This course will be helpful for- For all pre-medical examination (NEET JIPMER AIIMS and all state level exams) And also useful for students of class 11th and 12th Cbse And RBSE Helpful for all biological Olympiads.
ABOUT MYSELF- 2nd year Medical student At Dr.S.n. Medical college, Jodhpur 3rd topper of GPC RUHS Please follow review recommend enrol And not to forget to give upvote to my course!!!
3 domains of life They are relatively new grouping. Invented in 1990. One main characteristics of the three domain method is the separation of archae and bacteria, grouped into the single Kingdom bacteria. The three domains of life are as follows: Archaea Bacteria Eukaryota
Kingdom Monera This group consists of bacterias. There are 4 categories of bacteria based on their shape The spherical coccus (pl: cocci) The rod shape bacillus (pl: bacilli) The commma shape vibrium (pl: vibrio) The spiral spirillium (pl spirilla) Simple but complex organism Structure is simple, behaviour is complex. The most extensive metabolic diversity. Some are autotrophi, may be photosynthetic autotrophic and chemosynthetic autotrophic. Vast majority of bacteria are heterotrophic.
Bacterial shapes BACTERIA SHAPES SPHERES (COCCI) RODS (BACILLI)SPIRALS Streptococci (Streptococcus pyogenes) Chain of bacilli (Bacillus anthracis) Vibrios (Vibrio cholerae) pneumoniae) Tetrad Spirilla (Helicobacter pylori) Flagellate rods Salmonella typhi) (Staphylococcus aureus) Sarcina (Sarcina ventriculi stridium botulinum) Spirochaetes (Treponema pallidum)
Archaebacteria Habit and habitat- Mostly Harsh habitats Ex : halophiles in extreme salty areas Thermoacidophiles lives in hot springs Methanogens lives in marshy areas They have different cell wall so they are different from other bacterias and that's why they live in extreme conditions Methanogens are prein the guts of several ruminant animals such as cows and buffaloes and they are responsible for biogas production from their dung
Eubacteria Structure True bacteria Presence of rigid cell wall and if motile, a flagella. Ex: cyanobacteria (BGA) have chlorophyll similar to green plants and they are photosynthetic autotrophic, unicellular, colonial or filamentous, marine or terrestrial and colony are generally surrounded by gelatinous sheath. Habit and habitat- Often form blooms in polluted water bodies. Some of these fix atmospheric N2 by specialised cells called heterocysts. Ex: nostoc and anabaena Reproduction: Mainly by fission, they produces spores
Chemosynthetic autotrophic: They oxidised various inorganic substance sucha s nitrates, nitrites and ammonia and used to release energy for their ATP production. They play a great role in recycling nutrient like N2, Phosphorus, iron, Sulphur Most abundantly bacteria: Heterotrophic bacteria are most abundant in nature. Mainly as decomposers Economic importance: Helpful in making of curd from milk, production of antibiotics, fixing N2 in legumes roots, etc While some causes damage human being, crops, farm animals, pets causes cholera, typhoid, tetanus disease MYCOPLASMAS Lack of cell wall Smallest living cell Can survive without O2
Clearing concepts and doubts is what I do!!!📍 Enjoy learning!!!🎀 ❌Impossible ➡️work hard with smartness➡️possible✔️ 3rd year Medical student