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TLS Online TPP Program

#Question id: 3274

The common edible frog of Europe is a hybrid between two species, Rana lessonae and Rana ridibunda. The hybrids were first described in 1758 and have a wide distribution, from France across central Europe to Russia. Both male and female hybrids exist, but when they mate among themselves, they are rarely successful in producing offspring. What can you infer from this information?

#Section 3: Genetics, Cellular and Molecular Biology

  1. Postzygotic isolation exists between the two frog species.

  2. Prezygotic isolation exists between the two frog species.

  3. These two species are likely in the process of fusing back into one species.

  4. The hybrids form a separate species under the biological species concept.

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TLS Online TPP Program

#Question id: 429

#Section 4: Fundamentals of Biological Engineering

An organism that uses organic molecules as carbon sources and obtains energy by oxidizing inorganic molecules is a(an) ________.
TLS Online TPP Program

#Question id: 1993

#Section 2: General Biology

When antibodies attack antigens, clumping of the affected cells generally occurs. This is best explained by
TLS Online TPP Program

#Question id: 322

#Section 2: General Biology

A covalent bond is likely to be polar when ________.
TLS Online TPP Program

#Question id: 27241

#Section 3: Genetics, Cellular and Molecular Biology

Which is the largest among the followings?
TLS Online TPP Program

#Question id: 15924

#Section 6: Plant, Animal and Microbial Biotechnology

Name the type of culture which is prepared by inoculating directly from the tissue of an organism to culture media?