The concept of punctuated equilibrium challenges the traditional view of evolution by suggesting:
Evolution proceeds at a constant, gradual rate.
Long periods of stasis punctuated by rapid bursts of evolutionary change.
Evolutionary changes occur only in small, isolated populations.
Acquired characteristics are inherited and drive evolutionary change.
Related Questions
Theory of continuity of germplasm was given by
August Weismann
Lamarck
Darwin
Wallace
Which observation MOST directly challenges the idea of a universally applicable “molecular clock” for dating evolutionary divergence?
Fossil evidence sometimes contradicts molecular clock estimates.
Mutation rates can be influenced by environmental factors.
Different genes evolve at different rates, even within the same lineage.
Horizontal gene transfer can introduce new genes into a lineage.
Who proposed that the first form of life come from preexisting non-living molecules?
Devries and Haldane
Louis Pasteur and Miller
Darwin & Lamarck
Oparin & Haldane
Which of the following is NOT a key inference supporting the theory of evolution?
Common ancestry of different species based on anatomical and genetic similarities.
Natural selection leading to the adaptation of species to their environments.
The existence of an intelligent designer.
Descent with modification, where species change over time through the accumulation of adaptations.
The concept of 'adaptive radiation' is BEST exemplified by:
The evolution of antibiotic resistance in bacteria.
The development of camouflage in a prey species.
Darwin's finches on the Galapagos Islands developing diverse beak shapes for different food sources.
The gradual increase in size of a particular species over generations.
The first autotrophic organisms on Earth were likely:
Chemoautotrophs that did not release oxygen
Photoautotrophs that released oxygen
Chemoautotrophs that released oxygen
Photoautotrophs that did not release oxygen
Convergent evolution leads to:
Homologous structures in closely related organisms.
Vestigial structures in extant organisms.
Analogous structures in unrelated organisms.
Loss of genetic diversity within a population.
The idea of natural selection as the fundamental process of evolutionary changes was reached
By Alfred Russell Wallace in 1901
Independently by Charles Darwin and Alfred Russell Wallace in 1859
Independently by Charles Darwin and Alfred Russell Wallace in 1900
By Charles Darwin in 1866
Natural selection can lead to …A… in which more individuals acquire mean character value, …B…. more in which individuals acquire value other than the mean character value and …C… in which more individuals acquire peripheral character value at both ends of the distribution curve
Choose the correct options for A, B and C to complete the given statement with reference to NCERT text book
A: Stabilising selection, B: Disruptive selection, C: Directional selection
A: Directional selection, B: Stabilising selection, C: Disruptive selection
A: Disruptive selection, B: Directional selection, C: Stabilising selection
A: Stabilising selection, B: Directional selection, C: Disruptive selection
Which of the following situation would most likely result in the highest rate of natural selection?
Reproduction by asexual method
Low mutation is an stable environment
Little competition
Reproduction by sexual method
