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Heredity And Evolution

Question

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Explain with the help of an example each, how the following provides evidence in favour of evolution:
Homologous organs

Solution

The organs with same structural design and origin but different functions are called. homologous organs

For example in plants the thorn and tendrils of Bougainuillea and Cucurbita represent homology. Both the thorn and the tendril have a common ancestor but have evolved to perform a different function in the different organism. Like the thorn has a protective function whereas the tendril provides support to the plant. Thus, it represents divergent evolution.

Some More Questions From Heredity and Evolution Chapter

State the basic requirement for sexual reproduction? Write the importance of such reproductions in nature.

Distinguish between the acquired traits and the inherited traits in tabular form, giving one example for each.

Explain with the help of an example each, how the following provides evidence in favour of evolution:
Homologous organs

Explain with the help of an example each, how the following provides evidence in favour of evolution:
Analogous organs

Explain with the help of an example each, how the following provides evidence in favour of evolution:
Fossils

How do Mendel’s experiments show that
Traits may be dominant or recessive?

How do Mendel’s experiments show that
Inheritance of two traits is independent of each other?

Select the set of homologous organs from the following:

If you focus the image of a distant object, whose shape is given
below, on a screen using a convex lens,

the shape of the image of this object on the screen would be:

A Mendelian experiment consisted of breeding pea plants bearing violet flowers with pea plants bearing white flowers. What will be the result in F₁ pregeny?

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