Tag: evs - i

Genetically controlled traits are the one which is regulated by genes and are inherited from one generation to next via the process of reproduction. The overall appearance of an organism (phenotype) is the product of its genotype and environmental factors. The weight of an organism is determined in part by its genotype and in part by environmental factors like nutrition, lifestyle, physical activity etc. Thus, reduction in weight due to malnutrition is the environmental factor and is not determined genetically. Thus, the correct answer is option B 

In the process of sexual reproduction, the offsprings produced neither totally resemble (i.e., identical to) their parents nor are they totally different from their parents. Hence, heredity deals with the study of both resemblances and differences of offspring with their parents.

Mendel, during his hybridization experiments on pea plant, proposed presence of unit factors for each trait as heredity material that is faithfully transmitted from one generation to next. He called them “factors”. Sutton and Boveri recognized parallelism between inheritance of Mendel's factors and behavior of the chromosome in meiosis and fertilization. This led them to propose the chromosomal theory of inheritance states that genes are linearly arranged on chromosomes at specific loci. Darwin proposed the theory of natural selection to explain the process of evolution. Khorana extended the experiment of Nirenberg and Holley to reveal that polycytidylate encodes a polypeptide containing only proline and polyadenylate encodes polylysine. M. Nirenberg, Khorana, and Holley were awarded Nobel Prize for in vitro synthesis of polypeptides using artificially synthesized mRNA. Thus, the correct answer is option C.

Hereditary characters are physical or mental characteristics that pass from one generation to another in a family. Heredity is passing of that trait or certain features from parents to offspring.

Not everyone born with inherent skills or talent instead human beings learn and develop skills over the time to make their own survival better. Developing skills make a person confident and independent. One can earn and lead a healthy life by adopting their desired career line.

Our height grows till we are about eighteen years old. There are various factors that determine the height of any person. Like genetics, nutrition, lifestyle etc. Increases in height are primarily due to the lengthening of our bones and growth plates.

It is an old proverb that a healthy mind resides in a healthy body. Food rich in nutrition is a primary requirement for a healthy body but regular physical exercise along with nutritious food maintain the balance of minerals, protein etc in the body and keeps unnecessary diseases away from the body.

Cocaine are stimulants that is they elevate mood, increase feelings of well-being and increase energy and alertness.
Opium  and morphine are powerful pain-killers. They produce a quick, intense feeling of pleasure followed by a sense of well-being and calm.
Barbiturates are depressants that slow down the normal brain function.
Thus, the correct answer is 'Barbiturates cause relaxation and temporary euphoria'.