TLS Online TPP Program

#Question id: 14505


Two cards are drawn with replacement from a well shuffled deck of 52 cards. The mean and standard deviation for the number of aces are

Probability distribution table

#Unit 13. Methods in Biology
  1. 2/13 ,0.377
  2. 1/13, 0.277
  3. 3/13, 0.477
  4. none of these
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TLS Online TPP Program

#Question id: 10699

#Unit 10. Ecological Principles

Two plant species co-occur in a prairie. Species X always occurs near species Y. However, species Y often occurs in isolation from species X and produces more seeds when alone than when growing next to species X. Which of the following interactions between species X and could generate this pattern?

TLS Online TPP Program

#Question id: 10700

#Unit 10. Ecological Principles

Which of the following most important conclusion from the graph?


TLS Online TPP Program

#Question id: 10701

#Unit 10. Ecological Principles

In community, two species A and B were found. A species have an especially large impact on the structure of entire communities because they are highly abundant while B species are not usually abundant in a community however; exert strong control on community structure by their pivotal ecological roles, or niches. Which of the following is naming of species?

TLS Online TPP Program

#Question id: 10702

#Unit 10. Ecological Principles

Species A has a large effect on community because of its abundance in community known as

TLS Online TPP Program

#Question id: 10703

#Unit 10. Ecological Principles

Keystone predators can maintain species diversity in a community if they

TLS Online TPP Program

#Question id: 10704

#Unit 10. Ecological Principles

Imagine five forest communities, each with one hundred individuals distributed among four different tree species (W, X, Y, and Z). Which forest community would be most diverse?