Specific number of predators will keep the prey population at zero growth, represents

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#Question id: 4016

#Unit 3. Fundamental Processes

Activators that stimulate this kind of promoter work by triggering a conformational change in either RNA polymerase or DNA; that is, they interact with the stable closed complex and induce a conformational change that causes transition to the open complex. This mechanism is an example of

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#Question id: 18779

#Unit 13. Methods in Biology

Flow-cytometric analysis for the detection and measurement of subpopulations of leukocytes, including those of leukaemia, is usually performed using monoclonal antibodies. Why is this the case?

Choose whether each of the following statements is true 

a) Indirect immunofluorescence is a more sensitive technique than direct immunofluorescence

b) Most antigens induce a polyclonal response. 

c) For precipitation to occur, both antigen and antibody must be multivalent.

d) ELISA tests using chemiluminescence are more sensitive than chromogenic ones and precipitation tests are more sensitive than agglutination tests

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#Question id: 10822

#Unit 10. Ecological Principles

When two organisms attempt to utilize the same resource, the result is:

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#Question id: 1064

#Unit 4. Cell Communication and Cell Signaling

An infection in which the virus is continually present in the body is referred to as

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#Question id: 12376

#Unit 10. Ecological Principles

All of the following may be considered as sites for secondary succession EXCEPT