POST UTME LAUTECH 2017 Biology | Objective
Practice these randomly selected questions to test your readiness.
Question 1
A plant has a root system that consists of a taproot and several lateral roots. If the taproot grows at a rate of 2 cm/day and the lateral roots grow at a rate of 1 cm/day, what is the ratio of the growth rates of the taproot to the lateral roots?
Question 2
In the context of evolutionary theory, what is the primary mechanism driving the adaptation of populations to changing environments?
Question 3
A person has a blood type of A. If the person's parents are both type O, what is the probability that their child will also be type A?
Question 4
A 2.5 L flask contains 1.5 mol of an ideal gas at 27°C. If 1.0 mol of gas is added to the flask, what is the new pressure?
Question 5
A 2.5 kg block of wood is susp\ended from a spring with a spring cons\tant of 100 N/m. If the block is displaced by 0.5 m, what is the potential energy stored in the spring?
Question 6
A researcher is studying the effects of temperature on enzyme activity. Which of the following enzymes is most likely to be affected by a change in temperature?
Question 7
A researcher is studying the genetic variation of a specific trait in a population of 500 individuals. The trait is determined by a \single gene with two alleles: A and a. The frequency of allele A is 0.6, and the frequency of allele a is 0.4. What is the expected frequency of the AA genotype in the population?
Question 8
A researcher is studying the genetic variation of a specific trait in a population of 1000 individuals. The trait is determined by a \single gene with two alleles: B and b. The frequency of allele B is 0.7, and the frequency of allele b is 0.3. What is the expected frequency of the BB genotype in the population?
Question 9
A species of bird has a beak length of 10 cm. If the beak length is normally distributed with a mean of 12 cm and a s\tandard deviation of 2 cm, what is the probability that a randomly selected bird will have a beak length greater than 14 cm?
Question 10
A diagram of the human eye is shown below. What is the function of the part labeled 'A'?
Question 11
The Hardy-Weinberg principle states that the frequency of alleles in a population will remain cons\tant from generation to generation if five conditions are met. Which of the following is NOT one of the five conditions?
Question 12
A 10ml sample of a solution containing 0.5M NaCl is mixed with 20ml of water. What is the new concentration of the solution?
Question 13
In a typical e\cosystem, what is the primary role of photosynthesis in the nutrient cycle?
Question 14
A researcher is studying the effects of pH on enzyme activity. Which of the following enzymes is most likely to be affected by a change in pH?
Question 15
A researcher is studying the effect of antibiotics on the growth of bacteria. She measures the growth rate of the bacteria in the presence and absence of antibiotics and plots the data on a graph. Which of the following types of graphs would best represent the data?
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