Which of the following is not true for a species:
 

1.	Members of a species can interbreed
2.	Variations occur among members of a species
3.	Gene flow does not occur between the populations of a species
4.	Each species is reproductively isolated from every other species

De Vries gave his mutation theory on organic evolution while working on:

1. Oenothera lamarckiana

2. Drosophila melanogaster

3. Pisum sativum

4. Althea rosea 

Species separated by geographical barriers are called:
1.  Allopatric
2.  Sympatric
3.  Sibling
4.  Endemic

Age of Dryopithecous is estimated to be:
1.  2.46 crore years
2.  2.46 lakh year
3.  1 lakh year
4.  1 crore year

Which of the following statement is true:
1.  Homo erectus is direct ancestor of Homo sapiens
2.  Neanderthal man is direct ancestor of modern man
3.  Australopithecous is direct ancestor of modern man
4.  Fossils of cromagnon man first found in Ethiopia

Evolution of heart from one to two, three and four chambered proves:
1.  Biogenetic law of Haeckel
2.  Lamarckism
3.  Hardy weinberg's law
4.  Neo Darwinism

Genetic drift mainly takes place in:
1.  Small population
2.  Large population
3.  Oceanic population
4.  Never occurs

In present times, the origin of life is not possible from inorganic compounds due to:
1. Non-availability of raw material
2. High concentration of O₂ in the atmosphere
3. Decrease in temperature
4. Excess of pollution

On Galapagos island, Darwin observed variation in beaks of birds (Darwin's finches) and he concluded:
1.  Inter species variation
2.  Intraspecies variation
3.  Natural selection according to food
4.  Inheritance of acquired characters

Two opposite forces operate in the growth and development of every population. One of them is related to the ability to reproduce at a given rate. The force opposite to it is called:
1.  Fecundity
2.  Environmental resistances
3.  Biotic control
4.  Mortality