Slime Moulds: Notes Classification: Slime moulds are saprophytic protists. They feed on decaying organic matter, such as twigs and leaves. Feeding Mechanism: The slime mould’s body moves over decaying matter, engulfing organic material as it progresses. Plasmodium Formation: Under suitable conditions, slime moulds aggregate to form a structure called...
General Characteristics of Protozoans All protozoans are heterotrophic and live as predators or parasites. They are considered primitive relatives of animals. Classified into four major groups based on their mode of movement and lifestyle. Amoeboid Protozoans Habitat – Found in freshwater, seawater, or moist soil. Movement – Use pseudopodia...
Biology: The study of life forms and living processes. Diversity: The living world is incredibly diverse with a vast array of organisms. Early Perceptions: Early humans differentiated between living and non-living things. They often attributed divine qualities to both inanimate objects (wind, fire) and living organisms (plants, animals). These...
General Characteristics of Fungi Heterotrophic organisms showing great diversity in morphology and habitat. Common examples: Fungi on moist bread and rotten fruits. Edible mushrooms and toadstools. White spots on mustard leaves (parasitic fungi). Yeast (unicellular fungi) used in bread and beer production. Disease-causing fungi like Puccinia (wheat rust). Penicillium...
Ernst Mayr: The Darwin of the 20th Century Early Life and Passion: Born in Germany in 1904. Early fascination with birds sparked his interest in biology. Defining a Species: Revolutionized the concept of a species. Defined a species as a group of interbreeding populations reproductively isolated from others. This...
Habitat Found in aquatic environments. Grow on decaying wood in moist and damp places. Some exist as obligate parasites on plants. Structure Mycelium is aseptate and coenocytic (multinucleated continuous tube). Reproductionâś… Asexual Reproduction Occurs via spore formation inside sporangium. Zoospores (motile) or aplanospores (non-motile) are produced endogenously. âś… Sexual...
Characteristics of Living Things: Exclusive Characteristic:Â The ability to perceive events in the environment and retain their memory is a unique characteristic of living things. Distinguishing Feature:Â The ability to interact with the environment and undergo progressive evolution is a key feature that separates living organisms from non-living things. Biological Organization:Â The...
General Characteristics 🔹 Structure 🔹 Reproduction✅ Asexual Reproduction ✅ Sexual Reproduction 🔹 Examples
1. Introduction to Diversity The world is home to a large variety of living organisms, visible (e.g., plants, animals, birds) and microscopic. Biodiversity: Refers to the number and variety of organisms on Earth. Known and described species: 1.7–1.8 million. New species continue to be discovered with exploration. 2. Need...
1. Introduction to Taxonomic Categories Classification Process: Involves multiple hierarchical steps. Each step represents a rank or category. Taxonomic Hierarchy: Combination of all taxonomic categories. Categories are units of classification (referred to as taxa). Example: Insects: Share common features like three pairs of jointed legs. Classified into a rank/category...