TLS Online TPP Program

#Question id: 19458


How phase contrast and DIC microscopy are used to image live cells and unstained tissues?

#Unit 13. Methods in Biology
  1. Take advantage of differences in the contrast and thickness of cellular materials
  2. Take advantage of differences in the refractive index and thickness of cellular materials
  3. Live cells show bioluminiscence
  4. Take advantage of differences in chromosomes
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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,

TLS Online TPP Program

#Question id: 15723

#Unit 11. Evolution and Behavior

Neutral theory of molecular evolution of is given by,

TLS Online TPP Program

#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,

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?

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: 15719

#Unit 11. Evolution and Behavior

Carolus Linnaeus (1707–1778), who established the framework of modern taxonomy in his Systema Naturae (1735), won worldwide fame for his exhaustive classification of plants and animals, undertaken in the hope of discovering the pattern of the creation. Linnaeus classified,