Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 5955
TLS Online TPP Program

#Question id: 7155

What does it tell us about aging that cells from different organisms are capable of a fixed number of divisions in culture, and that number of divisions reflects the relative life-span of the organism?

#Unit 5. Developmental Biology
  1. The cells from these different organisms are not all equally adapted to growth in culture.
  2. In each organism, the cells seem to be capable of a genetically determined number of divisions, after which the organism undergoes senescence and dies.
  3. Cells growing in culture live for the same number of years that the organism from which they are derived would be expected to live, indicating a genetically determined life span.
  4. The conditions cells encounter in culture lead to oxidative damage which reflects the kind of damage that normally leads to aging in the organism.
More Questions
TLS Online TPP Program

#Question id: 12767

#Unit 10. Ecological Principles

Your friend comes to you with a problem. It seems his shrimp boats aren’t catching nearly as much shrimp as they used to. He can’t understand why because originally he caught all the shrimp he could handle. Each year he added a  new  boat,  and  for  a  long  time  each  boat  caught  tons  of  shrimp.  As  he  added  more  boats,  there  came  a  time when each boat caught somewhat fewer shrimp, and now, each boat is catching a lot less shrimp. Which of the following topics might help your friend understand the source of his problem?
TLS Online TPP Program

#Question id: 12768

#Unit 10. Ecological Principles

Carrying capacity is
TLS Online TPP Program

#Question id: 12769

#Unit 10. Ecological Principles

Which of the following graphs refer to this equation? 
TLS Online TPP Program

#Question id: 12770

#Unit 10. Ecological Principles

Which of the following graphs illustrates the population growth curve of single bacterium growing in a flask of ideal medium at optimum temperature over a 24 -hour period? 
TLS Online TPP Program

#Question id: 12771

#Unit 10. Ecological Principles

Which of the following graphs illustrates the growth curve of a small population of rodents that has grown to reach a static carrying capacity? 
TLS Online TPP Program

#Question id: 12772

#Unit 10. Ecological Principles

Which of the following is a likely graphic outcome of a population of deer introduced to an island with an adequate herbivory and without natural predators, parasites, or disease?