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TLS Online TPP Program

#Question id: 12245

The graph above illustrates a simplified description of the effect of disturbance on species diversity. Which of the following best explains the graph?

#Unit 10. Ecological Principles
  1. Productivity is enhanced at intermediate levels of disturbance. 
  2. Stabilizing selection occurs at intermediate levels of disturbance.
  3. The interaction of physical factors and biological competition increases diversity at intermediate levels of disturbance.
  4. Directional selection is enhanced by increased disturbance
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TLS Online TPP Program

#Question id: 14844

#Unit 13. Methods in Biology

An urn contains 25 balls numbered 1 through 25. Two balls are drawn from the urn with replacement. The probability of getting at least one odd is
TLS Online TPP Program

#Question id: 14775

#Unit 13. Methods in Biology

A bag contains 3 black and 5 white balls. One ball is drawn from the bag. What is the probability that the ball is not black ?
TLS Online TPP Program

#Question id: 14698

#Unit 13. Methods in Biology

A bag has 13 red, 14 green and 15 black balls. The probability of getting exactly 2 blacks on pulling out 4 balls is P1. Now the number of each colour ball is doubled and 8 balls are pulled out.The probability of getting exactly 4 blacks is P2. Then
TLS Online TPP Program

#Question id: 14696

#Unit 13. Methods in Biology

Urn A contains 6 red and 4 black balls and urn B contains 4 red and 6 black balls, one ball is drawn at random from urn A and placed in urn B. Then one ball drawn at random from urn B and placed in urn A. If one ball is now drawn from urn A, the probability that it is found to be red is
TLS Online TPP Program

#Question id: 14694

#Unit 13. Methods in Biology

Two balls are to be drawn from a bag containing 5 red and 7 white balls. Find the chance that they will both be white
TLS Online TPP Program

#Question id: 14692

#Unit 13. Methods in Biology

A box contains 6 white balls and 3 black balls and another box contains 4 white balls and 5 black balls. The probability that a ball selected from one of the box again selected at random is a white ball.