Volvox lecture, BSc, MSc by Dr. Anupama Goyal
Volvox is a coenobial and colonial alga. Volvox colonies multiply so rapidly during the rainy season that the entire pond is covered by them and appears greenish. The colonies are oval …
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Volvox is a coenobial and colonial alga. Volvox colonies multiply so rapidly during the rainy season that the entire pond is covered by them and appears greenish. The colonies are oval …
Volvox is a coenobial and colonial alga. Volvox colonies multiply so rapidly during the rainy season that the entire pond is covered by them and appears greenish. The colonies are oval to spherical in shape , having 500 to 60, 000 cells. The cells have a typical chlamydomonad type of structure. There is a single nucleus , cup shaped chloroplast , two contractile vacuoles , an eye spot, two flagella inserted at the anterior end. Reproduction in Volvox is of two types — asexual reproduction and sexual reproduction . Asexual reproduction occurs by means of special types of cells located at the posterior end of the colony . These special cells are called as gonidia. Sexual reproduction occurs at the end of the growing season. Male sex organ is known as antheridium and the female sex organ is known as oogonium.
Oxidation of food generates carbon dioxide. Transportation of this by three ways. Approximately 7 % of this transport in dissolved form, 23%in carbaminohaemoglobin form and 70% in bicarbonate form. CO2 enters …
Oxidation of food generates carbon dioxide. Transportation of this by three ways. Approximately 7 % of this transport in dissolved form, 23%in carbaminohaemoglobin form and 70% in bicarbonate form. CO2 enters into erythrocyte and binds with water molecule in the presence of carbonic anhydrase enzyme and formed carbonic acid. This acid dissociates into hydrogen and bicarbonate ions. Hydrogen ion binds with hemoglobin and formed a buffer molecule haemoglobinic acid. Bicarbonate ion passed out from RBC to plasma and bind with Na/K molecules. Due to this positivity of RBC increase and to restore this chloride ion enters in RBC. This phenomenon is known as chloride shift.
