KINGDOM FUNGI 29 June 2024
. Sclerotia:In pseudoparenchyma the outer hyphae become hard and to protect the inner one which germinate in favourable conditions.Ex.Claviceps.
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BIOLOGY
KINGDOM PROTISTA 26june 2024
CHARACTERSTICS OF DIATOMS
•1. They do not possess flagella except in the reproductive stage.
•2.Siliceous cell wall do not decompose easily ,they were collected over millions of years on the sea floor called diatomites or diatomaceous earth.
•3.Most of the diatoms are phytoplankton some are benthos or some terrestrial forms grow in moist areas
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PLASTIDS 21june2024
Plastids are double membrane bound bodies found in plants, protists, algae and absent in Animals.
Plastids are formed from colourless bodies in dividing cells termed Proplastids.
Mainly plastids are of two types
1.LEUCOPLAST 2. CHROMOPLAST
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STRUCTURE AND FUNCTIONS OF MITOCHONDRIA 20JUNE 2024
1.First seen by Kollikar in 1880. 2.Named mitochondria by Benda in 1898. 3.Recognised as a site of respiration by Hoogeboom and coworker in 1948. 4. It is known as power house of cell. •It is found in all aerobic eukaryotic cells and are more concentrated in the more active regions like muscle cells sperm tail
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CELL WALL 17june2024
Intussusception : Growth by addition of more growth material within existing one.
*Accertion:Growth by addition of new wall material on the existing one.
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DIFFERENCE BETWEEN PROKARYOTIC AND EUKARYOTIC CELLS
Prokaryotic cell Eukaryotic cell 1. Respiratory enzymes occur in mesosomes the infolds of cell membrane. 1. Respiratory enzymes are present in mitochondria (cell organelle and site of respiration) 2. In some bacteria photosynthetic enzymes are located in chlorosomes or cell membrane. 2. Photosynthetic enzymes are located in chloroplast. 3. Cell organelles are
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TYPES OF SIMPLE RACEMOSE INFLORESCENCE 10 JUNE 2024
DIFFERENT TYPES IF SIMPLE RACEME INFLORESCENCE INCLUDE TYPICAL RACEME, SPIKE, CATKIN, SPADIX,CORYMB,UMBEL AND CAPITULUM
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INFLORESCENCE
A flower is a modified shoot, shoot apical meristem changes to changes to floral meristem. The arrangement of flora axis is termed as inflorescence. Types of inflorescence: 1. RACEMOSE INFLORESCENCE 2. CYMOSE INFLORESCENCE 3. SPECIAL TYPE INFLORESCENCE RACEMOSE INFLORESCENCE CYMOSE INFLORESCENCE In this type the main axis of shoot continue to grow and
MONOCOT AND DICOT PLANTS
MONOCOT PLANT 1.Mono means single, cot comes from cotyledon (young leaf) that means the plant having single cotyledon are called monocot plants. Ex. Wheat 2.These plants have Fibrous and Adventitious root system. Fibrous root system : In this root system the main primary root is short lived is replaced by large number of roots originated
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