A. In homologous introns, the pattern of divergence involves both changes in length.

B. Divergence in introns is due to deletions and insertions and base substitutions. 

C. Introns are slowly evolve while exons much more rapidly 

D. When a gene is compared among different species, there are instances where its exons are homologous but its introns have diverged so much that very little homology is retained.

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#Question id: 4389

#Unit 3. Fundamental Processes

Regulation of transcription by steroid hormones

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#Question id: 31154

#Unit 7. System Physiology – Animal

Which of the following cells are involved in myelin formation around axons in the peripheral nervous system?

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#Question id: 23734

#Unit 8. Inheritance Biology

The narrow-sense heritability of ear length in Reno rabbits is 0.4. The phenotypic variance (VP) is 0.8, and the environmental variance (VE) is 0.2. What is the additive genetic variance (VA) for ear length in these rabbits?

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#Question id: 15709

#Unit 12. Applied Biology

Anti browning compounds helps to reduce toxicity by removing toxic substances produced during the culture and permits unhindered cell growth.

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#Question id: 31378

#Unit 5. Developmental Biology

The following experimental manipulations were carried out with Xenopus embryo.

Manipulation X: Exposure to UV radiation leading to the failure of cortical rotation.

Manipulation Y: Gastrulae treated with lithium chloride.

The following statements were made with respect to the above manipulations. Which one of the following represents correct statement?