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TLS Online TPP Program

#Question id: 9233

What is the biggest problem with selecting a site for a reserve?

#Unit 9. Diversity of Life Forms
  1. Making a proper selection is difficult because currently the environmental conditions of almost any site can change quickly.
  2. Keystone species are difficult to identify in potential reserve sites.
  3. Only lands that are not useful to human activities are available for reserves.
  4. Most of the best sites are inaccessible by land transportation, so making roads to them is often prohibitively expensive.
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TLS Online TPP Program

#Question id: 502

#Unit 1. Molecules and their Interaction Relevant to Biology

Which substance is a product of glycolysis, a precursor of gluconeogenesis and a precursor of the citric acid cycle?
TLS Online TPP Program

#Question id: 2658

#Unit 2. Cellular Organization

This condition in lac operon facilitates the condition of lac genes being transcribed at high levels
TLS Online TPP Program

#Question id: 32717

#Unit 1. Molecules and their Interaction Relevant to Biology

The enzyme urease enhances the rate of urea hydrolysis at pH 8.0 and 20oC by a factor of 1014. If a given quantity of urease can completely hydrolyze a given quantity of urea in 5.0 min at 20oC and pH 8.0, how long would it take for this amount of urea to be hydrolyzed under the same conditions in the absence of urease?
TLS Online TPP Program

#Question id: 26830

#Unit 10. Ecological Principles

Which attributes are involved in successfully invading species?
TLS Online TPP Program

#Question id: 7194

#Unit 5. Developmental Biology

Formation of digits and sculpting the tetrapod limb requires death of specific cells in the limb in a programmed manner. Which one of the following interactions could explain proper limb formation?