A urine sample with more than 100,000 organisms is considered indicative of infection. A urine sample containing 5,000 bacteria, with a generation time of 30 minutes, sits for 3 hours before finally being assayed. How many bacteria will then be present within the sample?

#Question id: 3313

#Unit 11. Evolution and Behavior

Which one of the following statement is incorrect for the process of speciation?

#Question id: 3314

#Unit 11. Evolution and Behavior

The body weight of offspring of bird species is range between 12 gm to 18 gm. In a laboratory experiment, species was subjected to selection pressure having influence on the offspring body weight. After many generations of experimental selection pressure, the body weight range between 14 gm to 16 gm. Which of the following natural selection operate on this species?

#Question id: 3315

#Unit 11. Evolution and Behavior

Which one of the following statements is TRUE for Negative-frequency dependent selection?

#Question id: 3316

#Unit 11. Evolution and Behavior

There are two population A (N = 500) and B (N=50). Due to genetic drift, both populations will lose its genetic diversity in a generation. Such losses become magnified over many generations. After 20 generations, what will be lose its original variation?

#Question id: 3317

#Unit 11. Evolution and Behavior

Which of the following statements is NOT correct regarding effect of genetic drift?

#Question id: 3318

#Unit 11. Evolution and Behavior

When members of a metal- torerant and metal sensitive species that initially occupied the same habitat within the same range diverge into two species due to starting to show a change in their flowering season. This process known as