Biology MCQs

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The guinea pig or domestic guinea pig also known as cavy or domestic cavy, is a species of rodent belonging to the family Caviidae and the genus Cavia.

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Heart has four chambers, left & right ventricles and left & right atria which are synchronized to act together. A condition in which synchronizm does not take place is know as fibrillation. Fibrillation of atrial muscles is called as atrial fibrillation, fibrillation of the ventricular muscles is termed as ventricular fibrillation. In atrial fibrillation the ventricles functions normally, but respond with an irregular rhythm. In atrial fibrillations circulation is maintained, although not as efficiently. Ventricular fibrillation is more dangerous, as the ventricle are unable to pump the blood. There are many methods of correcting fibrillation mechanically, includingA.C. defibrillation & D.C. defibrillation. (Source: The Hindu Speaks on Science). Kindly read about working of Human Heart, particularly, how blood passes in 4 different parts of Human heart.

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Santiago Ramón y Cajal is often called the father of neuroscience. He won the Nobel Prize for Physiology/Medicine in 1906 for his theory, which became known as the neuron theory.

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Louis Pasteur is considered as father of Bacteriology. Louis Pasteur was a French chemist and microbiologist who was one of the most important founders of medical microbiology. He pioneered the study of molecular heterogeneity; discovered that microorganisms cause fermentation and disease; Initiated the process of pasteurization and developed vaccines against anthrax and rabies.

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The shape of enveloped viruses is roughly spherical. Enveloped virus have glyco-protein spikes that arise from their envelopes.

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Nitrification is the process by which bacteria changes soil ammonia into nitrates. Nitrosococcus, Nitrosomonas, Nitrosospira etc. is the bacteria which is helpful in the Nitrification Process

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Since being prokaryotic cells, they do not have chromosomes, so they lack sexual reproduction.

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Kelp such as Fucus and Laminaria are rich sources of iodine. They are members of the Phaeophyceae brown algae.

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The veins of the leaves are provided with vascular tissue called xylem and phloem. The xylem transports water from the roots to the leaves and the phloem transports food through the leaf to the rest of the plant.

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Scorpion is an example of Phylum Arthropoda. They are triploblastic, coelomate, bilaterally symmetric and their body is protected by a hard covering called an exoskeleton, which is made of chitin.