In an experiment, two fly populations are separately maintained for many generations. Population A contains closely-related individuals. Population B contains a set of unrelated individuals. Over many generations it is observed that the fitness of individuals in population A is lower than the fitness of those in population B. Why? 

a. Close relatives will not mate with one another 

b. Close relatives compete for common resources more than unrelated individuals 

c. The offspring of close relatives harbour more deleterious recessive mutations 

d. Unrelated individuals are likely to contain new high-fitness genes

How would you test whether a phenotypic difference between two populations of a plant is due to environmentally induced plasticity or evolutionary adaptation? 

a. DNA sequencing 

b. RNA sequencing 

c. Grow both populations in different greenhouses 

d. Grow both populations in the same greenhouse

Platelets contain 

a. Both genomic and mitochondrial DNA 

b. Only mitochondrial DNA 

c. Only genomic DNA 

d. No DNA

When a non-volatile solute is dissolved in a pure solvent, the difference between the freezing points of the solvent alone and the solution is 

a. positive 

b. negative 

c. zero 

d. none of the above

Which of the following compounds does not undergo ozonolysis reaction? 

a. 3-methyl-1-butene 

b. 2,3-dimethyl-butane 

c. 2-methyl-2-butene 

d. 2-methyl-1-butene

When you are writing a paper, which of the following actions does not require you to cite the source? 

a. Reusing a standard abbreviation from a published paper 

b. Reusing a sentence from a published paper 

c. Reusing a paragraph from the methods section of a published paper 

d. Reusing a paragraph from Wikipedia

Which compound is most acidic? 

a. H₂O 

b. H₂S 

c. H₂Se 

d. NH₃

Which one of the following cannot form a bilayer by itself? 

a. Glycerophospholipids 

b. Cholesterol 

c. Phosphatidic acid 

d. Glycerolipids

Standing waves are excited in a 1 m long pipe open at one end, closed at the other. Take the speed of the wave as 340 m/s and calculate the frequency of the first overtone (i.e. the first harmonic above the fundamental frequency). 

a. 128 Hz 

b. 170 Hz 

c. 255 Hz 

d. 510 Hz

Which one of the following quantities is invariant under Lorentz transformation? 

a. Charge density 

b. Charge 

c. Current 

d. Electric field