Which of the following is an example of an adaptation?
A scar on a dog's leg
Camouflage coloring of a chameleon
A broken wing on a bird
A learned trick by a dolphin
Related Questions
Phrase ‘Survival of the Fittest’ was used by
Hugo de Vries
Charles Darwin
Herbert Spencer
Jean Baptiste Lamarck
Evolutionary history of an organism is known as
Genetics and interpretation
Biogenesis
Recapitulation
Phylogeny
Stanley Miller proposed origin of life by
Chemical synthesis
Abiogenesis
Biogenesis
None of these
Continuity of germplasm’ theory was given by
Hugo de Vries
Weismann
Darwin
Lamarck
S.L. Miller's experiment provided evidence for the abiotic synthesis of organic monomers. Which of the following organic molecules were predominantly produced in his simulated early Earth environment?
Nucleic acids
Carbohydrates
Amino acids
Lipids
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.
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
Why were the earliest organisms on Earth most likely anaerobic?
Lack of free oxygen in the early atmosphere
Abundance of free oxygen in the early atmosphere
High temperatures in the early atmosphere
Low availability of organic molecules
Which type of growth living organism undergoes?
Reversible
Apical
Accretion
Intussusception
England in 1850s, i.e., before industrialization set in, it was observed that there were more white-winged moths on trees than dark-winged or melanised moths.
However, in the collection carried out from the same area, but after industrialization, i.e., in 1920, there more dark-winged moths in the same area, i.e., the proportion was reversed
Predict the possible reason for such change
Natural selection
Artificial selection
Conditional selection
Divergent selection
