Introduction to Lymphoid Organs Lymphocytes, which are immature and generated in hematopoiesis gets mature and become committed to a particular antigenic specificity within the primary lymphoid organs. The cell becomes immune-competent only after the lymphocytes have matured in the primary lymphoid organs. T cells arise in the bone marrow and develop in the thymus. In … Read more
1. Diagnostic features Rarely trees, mostly herbs or shrubs. Leaves- simple, alternate in the vegetative parts and opposite in the floral region, ex-stipulate, petiolate or sub-sessile. Flowers- bisexual, actinomorphic and hypogynous. Stamens usually 5, polyandrous, epipetalous. Gynoecium- bi-carpellary, syncarpous with axile placentation, placenta is swollen, ovule numerous. Ovary obliquely placed. Fruit- a berry or a … Read more
Introduction Derived from two Greek words (Bryon: Moss; phyton: plant). Includes liverworts, hornworts and mosses. Commonly known as amphibians of plant kingdom because they grow on amphibious habitat (moist habitat). Worldwide in distribution on most parts of the earth wherever there is sufficient moisture to sustain plant life. General characteristics Mostly grow in moist and … Read more
Fertilized ovary is called fruit. It has two parts i.e. fruit wall or pericarp and seeds. Pericarp is made up of three layers epicarp, mesocarp and endocarp. Fruits might be true fruits and false fruits. True fruit develops from ovary and false fruit develop from any part other than ovary. Types of fruits: Fruits are … Read more
S.N Scientific name Common name Edible part Fruit type 1. Pisum sativum Garden pea Seeds Legume 2. Abelmoschus esculentus Lady’s finger Entire fruit Capsule 3. Anacardium occidentale Cashew nut Cotyledons and fleshy thalamus Nut 4. Litchi Litchi Aril Nut 5. Trapa Water chestnut Seeds Nut 6. Arachis hypogea Ground nut Seeds Lomentum 7. Mangifera indica … Read more