A student takes a quiz consisting of 5 multiple choice questions. Each question has 4 possible answers. If a student is guessing the answer at random and answer to different are independent, then the probability of atleast one correct answer is

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#Question id: 1977

#Unit 4. Cell Communication and Cell Signaling

A patient can produce antibodies against some bacterial pathogens, but he does not produce antibodies against viral infections. This is probably due to a disorder in which cells of the immune system?

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#Question id: 12815

#General Aptitude

There is a rectangular tank of length 180 m and breadth 120m in a circular field. If the area of the land portion of the field is 40000 m2, what is the radius of the field ?  

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#Question id: 6623

#General Aptitude

Given set : (18 , 8, 2)

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#Question id: 29571

#Unit 6. System Physiology – Plant

Histone deacetylase activity in the maize (Zea mays) inhibited by

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#Question id: 3369

#Unit 11. Evolution and Behavior

Genetic drift refers to random changes in allele frequencies over time leads to following consequence

a. Loss of genetic diversity per generation   

b. change in allelic frequency just by chance 

c. It caused adaptive evolution

d. It one allele may reach to 0 frequency