The hair-like extended portion of the cell surface bounded by the cell membrane and containing microtubules and responsible for cell motility are known as cilia and flagella. The cilia and flagella are widely distributed in both the animal and plant cells. Flagella (singular = flagellum) are complex filamentous, long, thread-like structures that extend from the … Read more
The old cells divide to produce new cells. In this case, a single old cell divides into two cells and these two new cells again divide to produce four cells and so on. Generally, this process is known as cell division where a parent cell divides into two or more daughter cells. The capability of … Read more
Sixspine butterfly fish is a very attractive fish which is also known as Ocellated Coralfish, Eye-spot Butterflyfish, Six-spined Butterfly-fish or Six-spined Coralfish. It has compressed, sub-rhomboidal body with prominent snout. Anterior portions of soft dorsal and anal fins are the highest. Lateral line ceases the opposite of the posterior fourth of the dorsal fin. Systematic … Read more
Anaerobic respiration is the process by which incomplete oxidation of respiratory substrate takes place. In this case, it occurs in the absence of oxygen resulting the end products of ethyl alcohol and CO2 in plants and lactic acid (in animals) with very slight energy. Anaerobic respiration is observed in certain bacteria, yeast and other fungi, … Read more
Volvox is a common freshwater free-floating chlorophytic green alga that belongs to Volvocaceae family under order Volvocales of division Chlorophyta. They occur in temporary and permanent freshwater tanks, ponds, pools, ditches, etc. There are some 20 freshwater species of Volvox which prefer to live in colonies with up to 60,000 cells by making a gelatinous … Read more
Johannes Friedrich Miescher (a Swiss physician and biologist) first discovered the Nucleic acids as ‘nuclein’ from the nucleus in 1869. Severo Ochoa de Albornoz (a Spanish-American physician and biochemist) discovered the RNA synthesis mechanism in 1959. He won the Nobel Prize jointly with Arthur Kornberg in Physiology or Medicine for his discoveries. In 1965, Robert … Read more