Which class of vertebrates shows double circulation but incomplete separation of ventricles?

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#Question id: 38797

#Plant Biotechnology

Q. Why might a plant that survives thermotherapy be at a disadvantage later on? 

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#Question id: 38798

#Plant Biotechnology

Q. Assertion (A):Thermotherapy combined with meristem (shoot-tip) culture is more effective than either method alone for eliminating certain plant viruses.

Reason (R): Some viruses such as Potato virus S (PVS) and Potato virus X (PVX) can only be eliminated when heat treatment is followed by shoot-tip culture, and larger shoot tips taken from heat-treated plants show better survival.

Choose the correct option:

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#Question id: 38799

#Botany

Transformation in bacteria was discovered by:

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#Question id: 38800

#Plant Biotechnology

Q. Which of the following explants is preferred for meristem culture?

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#Question id: 38801

#Plant Biotechnology

Q. What is the optimal size of a meristem explant for culture?

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#Question id: 38802

#Plant Biotechnology

Q. Which of the following statements best explains the limitation of meristem culture for producing virus-free plants?