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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: 401

#Unit 1. Molecules and their Interaction Relevant to Biology

.Which of the following graphs describes the relationship between [H3O+] and pH?
TLS Online TPP Program

#Question id: 434

#Unit 1. Molecules and their Interaction Relevant to Biology

 Anabolic and catabolic reactions in eukaryotes can occur simultaneously in cells. This is possible because ________.
TLS Online TPP Program

#Question id: 9257

#Unit 9. Diversity of Life Forms

Which lake zone would be absent in a very shallow lake?
TLS Online TPP Program

#Question id: 8949

#Unit 9. Diversity of Life Forms

Which of the following functions is an advantage of a fluid-filled body cavity?
TLS Online TPP Program

#Question id: 11277

#Unit 10. Ecological Principles

If a species is a keystone predator, then its removal from a community should

(A) Increase population size of the predator’s preferred prey

(B) decrease species diversity in the prey community

(C) decrease productivity of the predator’s preferred prey

(D) increase species diversity in the prey community