It is referring to natural selection
Muscles can only produce a force as they relax
The answer is A.
tRNA brings amino acids in the cytoplasm of a cell to the ribosomes in said cell during RNA translation, allowing the formation of a protein.
the difference between the birth rate nad the death rate is known as growth rate. the growth rate is expresse in percentage ex:the presentrate of india is 1.93% per annum . According to 2001 census, birth rate was 26.1 per thousand and death rate was 8.7 per thousand . thus growth rate was 19.3 or 1.93% per year . births and death continue to take place at all places around the world . the differnce between total birth and total birth and total deaths in a populations over a period of time decides whether the population growthof the place is positive or negative. if the birth rate is higher than the death rate in a country, it means that the population will register a growth on the other hand, birth rate less than death rate indicates a shrinking population
