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TLS Online TPP Program

#Question id: 12570

Extinction is a natural phenomenon. It is estimated that 99% of all species that ever lived are now extinct. Why then do we say that we are now in a biodiversity crisis?

#Unit 10. Ecological Principles
  1. Humans are ethically responsible for protecting endangered species.
  2. Scientists have finally identified most of the species on earth and are thus able to Quantify the number of species becoming extinct.
  3. The current rate of extinction is high and human activities threaten biodiversity at all levels.
  4. Humans  have  greater  medical  needs  than  at  any  other  time  in  history,  and  many  potential  medicinal compounds are being lost as plant species become extinct.
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TLS Online TPP Program

#Question id: 264

#Unit 1. Molecules and their Interaction Relevant to Biology

Supercoiling of pure circular DNA is a result of ________.
TLS Online TPP Program

#Question id: 4611

#Unit 11. Evolution and Behavior

Given what we know about evolutionary biology, we expect to find the largest number of endemic species in which of the following geological features, which have existed for at least a few million years?
TLS Online TPP Program

#Question id: 11035

#Unit 7. System Physiology – Animal

A 72-year-old man had surgery to remove an abdominal tumor. Pathohistologic studies reveal that the tumor mass contains a large number of blood vessels. An increase in which of the following is the most likely stimulus for the growth of vessels in a solid tumor?
TLS Online TPP Program

#Question id: 12731

#Unit 13. Methods in Biology

Choose the correct codon for phenylalanine.
TLS Online TPP Program

#Question id: 2484

#Unit 2. Cellular Organization

The EB1 protein has several functions.  Which of the following is/are true regarding EB1?