Biology is the natural science that studies life and living organisms, including their physical structure, chemical processes, molecular interactions, physiological mechanisms, development and evolution.
Q. Which blood vessels have the smallest diameter?
⇒ A capillary is a small blood vessel from 5 to 10 micrometres (μm) in diameter, and having a wall one endothelial cell thick. They are the smallest blood vessels in the body: they convey blood between the arterioles and venules.
Q. Measles is which type of disease?
Ans: Airborne Diesease
⇒ Measles is an airborne disease which spreads easily through the coughs and sneezes of infected people. It may also be spread through direct contact with mouth or nasal secretions. It is extremely contagious–nine out of ten people who are not immune and share living space with an infected person will be infected.
Q. Which organ of the body produces the fluid known as bile?
⇒ Bile or Gall is a dark-green-to-yellowish-brown fluid produced by the liver of most vertebrates that aids the digestion of lipids in the small intestine. In humans, bile is produced continuously by the liver (liver bile) and stored and concentrated in the gallbladder.
Q. Which is the largest human cell?
⇒ The Ovum or the “Egg” is the largest cell of the human body. The human egg is a giant compared to other cells in the body. It has a diameter of about 100 microns, or roughly the thickness of a strand of hair.
Q. What is the life span of WBC?
Ans: 5 – 21 Days
⇒ The lifespan of white blood cells ranges from 13 to 20 days, after which time they are destroyed in the lymphatic system. When immature WBCs are first released from the bone marrow into the peripheral blood, they are called “bands” or “stabs.”
Q. Which is the vertebrate that has two chambered heart?
⇒ The hearts of fishes are two chambered hearts, they have only one atrium and one ventricle. In that respect the fish heart resembles the embryonic condition of all other vertebrate animals.
Q. In which parts of the Alimentary Canal, the Rennin enzyme is secreted?
⇒ Rennin, also called chymosin, protein-digesting enzyme that curdles milk by transforming caseinogen into insoluble casein; it is found only in the fourth stomach of cud-chewing animals, such as cows. Its action extends the period in which milk is retained in the stomach of the young animal.
Q. “Rinderpest” disease, which was recently eliminated was caused by:
⇒ Rinderpest (Also cattle plague or steppe murrain) was an infectious viral disease of cattle, domestic buffalo, and many other species of even-toed ungulates, including buffaloes, large antelope, deer, giraffes, wildebeests, and warthogs.
Q. Which plants is known as Indian ginseng?
Ans: Withania Somnifera
⇒ Withania Somnifera, known commonly as Ashwagandha, Indian ginseng, poison gooseberry, or winter cherry, is a plant in the Solanaceae or nightshade family. Several other species in the genus Withania are morphologically similar.
Q. In context with the connective tissues, which connect join Bones to Bones?
⇒ A ligament is the fibrous connective tissue that connects bones to other bones. Ligaments are similar to tendons as they are all made of connective tissue. The differences in them are the connections that they make. Ligaments connect one bone to another bone while the tendons connect muscle to bone.