Advertisements
Advertisements
प्रश्न
Define Organic evolution.
Advertisements
उत्तर
Organic evolution can be defined as slow, gradual, continuous and irreversible changes through which the present-day complex forms of the life developed (or evolved) from their simple pre-existing forms.
APPEARS IN
संबंधित प्रश्न
Explain the concept ‘survival of the fittest’.
With the help of suitable examples, explain why certain traits cannot be passed on to the next generation. What are such traits called?
Some plants occur in one of the two sizes : tall or dwarf. This characteristic is controlled by one pair of genes. Tallness is dominant to dwarfness. Choose suitable letters for this gene pair.
Explain how, characteristics (or traits) are inherited through genes.
Fill in the following blank with suitable word :
The human forelimb and bat's forelimb are an example of .......... organs whereas an insect's wing and a bat's wing are an example of ........... organs.
List two differences between acquired traits and inherited traits by giving an example of each.
Multiple choice question.
Gene frequency in a population remain constant due to –
Short answer question.
Draw a graph to show that natural selection leads to disruptive change.
Name any three types of postmating isolating mechanisms.
What is a connecting link?
