POST UTME COAL CITY UNIVERSITY 2021 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A plant grows from a seed in a controlled environment. If the plant grows 2 cm in the first day, 3 cm in the second day, and 4 cm in the third day, what is the average rate of growth per day?
A. 3 cm/day
B. 3.5 cm/day
C. 4 cm/day
D. 4.5 cm/day
Question 2
A species of plant has a photosynthetic rate of 10 mg CO2/m^2/s. If the plant is exposed to light for 8 hours a day, what is the total amount of CO2 fixed by the plant per day?
A. 12000
B. 24000
C. 38400
D. 48000
Question 3
What is the term for the movement of molecules from an area of high concentration to an area of low concentration?
A. Diffusion
B. Osmosis
C. Active transport
D. Passive transport
Question 4
The concept of natural selection, as proposed by Charles Darwin, involves the survival and reproduction of individuals with which of the following characteristics?
A. Stronger limbs
B. Brighter plumage
C. Improved camouflage
D. Increased intelligence
Question 5
A patient has a blood pH of 7.2. What is the likely cause of this condition?
A. Diabetes Mellitus
B. Chronic Kidney Disease
C. Respiratory Acidosis
D. Metabolic Alkalosis
Question 6
In a tropical rainforest, the nutrient cycle is primarily driven by the decomposition of organic matter by which of the following organisms?
A. Fungi
B. Bacteria
C. Protozoa
D. Rotifers
Question 7
In a population of 1000 bacteria, 80% are resis\tant to antibiotic A. If 200 bacteria are randomly selected for treatment, what is the probability that at least 150 will be resis\tant to antibiotic A?
A. 0.25
B. 0.30
C. 0.35
D. 0.40
Question 8
A diagram of a plant's xylem and phloem is shown below. Which of the following is the primary function of the xylem?
A. Transporting water and minerals from the roots to the leaves
B. Transporting sugars and other organic compounds from the leaves to the rest of the plant
C. Storing water and nutrients in the plant
D. Regulating the plant's temperature
Question 9
The xylem in plants is responsible for transporting which of the following subs\tances?
A. Water and minerals
B. Sugars and amino acids
C. Oxygen and carbon dioxide
D. Hormones and waste products
Question 10
A diagram of the human eye is shown below. Which part of the eye is responsible for focu\sing light onto the retina?
A. Cornea
B. Iris
C. Lens
D. Retina
Question 11
A plant with the genotype 'Rr' is crossed with a plant with the genotype 'RR'. What is the probability that the offspring will have the genotype 'rr'?
A. 0.25
B. 0.5
C. 0.75
D. 1.0
Question 12
A microorganism is placed in a nutrient-rich medium. Which of the following will occur?
A. The microorganism will die due to lack of nutrients
B. The microorganism will grow and multiply
C. The microorganism will remain unchanged
D. The microorganism will be destroyed by the medium
Question 13
The process of meiosis in reproductive cells involves the reduction of the chromosome number by half, resulting in the production of which of the following?
A. Gametes
B. Zygotes
C. Sperm and egg cells
D. Embryos
Question 14
A 50 kg person is s\tanding on a scale in an elevator. If the elevator accelerates upward at 2 m/s^2, what is the reading on the scale?
A. 500 N
B. 550 N
C. 600 N
D. 650 N
Question 15
A researcher is studying the effects of pH on the growth of Escherichia coli. Which of the following pH ranges would be most suitable for the growth of this bacterium?
A. pH 5.0-6.0
B. pH 6.5-7.5
C. pH 7.0-8.0
D. pH 8.5-9.5

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