Category: Biology Questions

Describe briefly the mechanism of hearing?

Mechanism of Hearing: The sound waves from the external environment are perceived by the external pina and are transmitted to the fenestra vestibuli (oval window) through the eardrum and auditory ossicles. The auditory vesicles amplify the sound vibrations and the eustachian tube serves to equalize the pressure on the sides of the tympanic membrane. The fenestra …

Role of Bacteria in Medicines

Role of Bacteria in Medicines: Bacteria played an important role in the manufacturing of medicines. These are- (1) Antibiotics- These are organic substances obtained from living organisms. These substances kill or inhibit the growth of other organisms. Gramicidin, Tyrothricin, Subtilin and Bacitracin are some of the antibiotics obtained from bacteria. But none of these has been …

What is Connective tissue? Also provides its functions

Connective tissue: Connective tissue is mesodermal in origin and form of matrix, fibres and cells. It constitutes the extracellular ground substance and fills up the intercellular spaces between the cells. Functions of Connective tissues: Connective tissue is basically a binding and a packaging tissue but has many other important functions as well- A type of connective …

What is Hybridization? Give its uses and describe different types of hybridization in Plants.

Hybridization in Plants: Hybridization is the method of producing new crop varieties by crossing two genetically different parents. As a result of hybridization, the desirable characters of two or more species or varieties are combined together or are transformed from one to the other. Hybridization increases genetic variability. Uses of Hybridization: The main purpose of hybridization …

What is Genetic load?

Genetic load: Genetic load is a measure of the number of disadvantageous genes in a population or of the damage done to the population by certain genetic factors. Disadvantageous genes reduce fitness by mortality, morbidity or sterility in heterozygotes, if the gene is dominant and in homozygotes, if it is recessive. Thus, it is related to …