Lactate dehydrogenase (LDH) can exist as various tetrameric isozymes. Extracts from different rat tissues were run on a nondenaturing polyacrylamide gel and stained for LDH activity, as shown below. Standard tetramers of M subunits (M4) and H subunits (H4) were run alongside the tissue extracts. Which of the following is the subunit composition of the isozyme running at position 2 ?

TLS Online TPP Program

#Question id: 15720

#Unit 11. Evolution and Behavior

The geologists ________ expounded the principle of uniformitarianism, holding that the same processes operated in the past as in the present and that the data of geology should therefore be explained by causes that we can now observe.

TLS Online TPP Program

#Question id: 15721

#Unit 11. Evolution and Behavior

Lamarck argued that species differ from one another because they have different needs, and so use certain of their organs and appendages. This hypothesis is known as?

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#Question id: 15722

#Unit 11. Evolution and Behavior

The variation that arises is directed toward fixed goals, so that a species evolves in a predetermined direction by some kind of internal drive, without the aid of natural selection. This hypothesis is known as,

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#Question id: 15723

#Unit 11. Evolution and Behavior

Neutral theory of molecular evolution of is given by,

TLS Online TPP Program

#Question id: 15724

#Unit 11. Evolution and Behavior

Neo-Lamarckism includes several theories based on the old idea of inheritance of modifications acquired during an organism’s lifetime. In a famous experiment done by,

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#Question id: 15725

#Unit 11. Evolution and Behavior

Alfred Russel Wallace (1823–1913), who was collecting specimens in the Malay Archipelago, had independently conceived that