The demographic transition model depicts demographic changes from high- to low-level births and deaths in five stages

Stage 1 is characterized by total population numbers are low and the high birth rate is balanced by the high death rate.

B) Stage 2 is characterized by high population growth rate is results of high birth rate however, decline death rate

C) Stage 4 is characterized by decline in the proportion of the population in the reproductive age group and these changes stabilizes population size

D) Stage 3 is characterized by falling birth rates and death rates and population growth rate is zero due to the less numbers of people in the reproductive age group

TLS Online TPP Program

#Question id: 15721

#Section 2: Evolution

Lamarck argued that species differ from one another because they have different needs, and so use certain of their organs and appendages. This hypothesis is known as?

TLS Online TPP Program

#Question id: 15722

#Section 2: Evolution

The variation that arises is directed toward fixed goals, so that a species evolves in a predetermined direction by some kind of internal drive, without the aid of natural selection. This hypothesis is known as,

TLS Online TPP Program

#Question id: 15723

#Section 2: Evolution

Neutral theory of molecular evolution of is given by,

TLS Online TPP Program

#Question id: 15724

#Section 2: Evolution

Neo-Lamarckism includes several theories based on the old idea of inheritance of modifications acquired during an organism’s lifetime. In a famous experiment done by,

TLS Online TPP Program

#Question id: 15725

#Section 2: Evolution

Alfred Russel Wallace (1823–1913), who was collecting specimens in the Malay Archipelago, had independently conceived that

TLS Online TPP Program

#Question id: 4598

#Section 2: Evolution

Fossils of Thrinaxodon, a species that lived during the Triassic period, have been found in both South Africa and Antarctica. Thrinaxodon had a reptile-like skeleton and laid eggs, but small depressions on the front of its skull suggest it had whiskers and, therefore, fur. Thrinaxodon may have been warm-blooded. The fossils of Thrinaxodon are consistent with the hypothesis that ________.