AIIMS Botany Evolution Class 12 Questions

Assertion : Heterospory and retention of female gametophyte are responsible for origin of seed habit in Selaginella Reason: Psilotum is a living fossil

Hardy Weinberg equilibrium is affected by-

Scientists have narrowed down several of the most likely causes of mass extinction. Asteroid collision is the most likely causes of mass extinctions, though several other known events may also contribute.

Lamarck, Darwin, Hugo de Vries are the three scientists who best explained evolution.

Radioactive C⁻dating and living fossils are used for-

Which of the following is the relatively most accurate method for dating fossils?

Reproductive isolation in sympatric speciation develops without a

From the statements given below, which one most likely represents an example of disruptive selection. I. Industrial melanism in peppered moth. II. Population of butterflies that are either all yellow or all blue. III. Population of rabbits that evolves more body fat in response to a cold climate. IV. Population of wrens that evolves to be smaller at sexual maturity in response to predation pressure.

The best description of natural selection is

The correct sequence of stages in the evolution of modern man (Homo sapiens), is

The extinct human ancestor, who ate only fruits and hunted with stone weapons was