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Evolution

Question
CBSEENBI12047318
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Bursa fabricius is an important organ of birds. This organ is associated with

  • generation of basophil

  • production of uric acid

  • metabolism of fatty acids

  • generation of B-cell

Solution

D.

generation of B-cell

Bursa of fabricius is a thymus like lymphoid organ found in birds. It is the site of B-cell maturation as bone marrow is absent in birds. It plays a central role in the development of the antibody- producing B- lymphocyte lineage in birds.

Some More Questions From Evolution Chapter

Which group of organisms were responsible for appearance of free oxygen in the atmosphere of the primitive earth ?

What is meant by the term fossil ?

What is the type of evolution in which the same structure developed along different directions due to adaptations to different needs ?

Name the different eras of geologic time scale.

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Consider a thorn in Bougainvillea and a tendril in cucurbita. Are these two organs homologous or analogous ? Give reason.

Give two examples that represent adaptive radiation.

Which theory attempts to explain to us the origin of universe?

Evolution is a discontinuous process. Is it correct ?

Give the three key factors of the modern concept of evolution.

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