1 Which of the following is the color label for a foam type fire extinguisher? flag bookmark A Black B Cream C Blue D Red T4 Chapter 1.3 Fire Extinguishers Foam extinguishers are identified by a cream colour label, so the correct choice is Cream.
2 Diagram 1 shows a man performing an emergency aid procedure. What is the purpose of this procedure? flag bookmark A To decrease air volume in the lungs B To increase air volume in the lungs C To increase the diameter of the respiratory tract D Pushing foreign objects out of the respiratory tract T4 Chapter 2.2 Heimlich Manoeuvre The abdominal thrusts create a sudden upward force that dislodges and pushes foreign objects out of the airway.
3 Diagram 2 shows a conversation between two women. What is the BMI for Anita? > BMI = Body mass (kg) ÷ (Height)² (m²) flag bookmark A 23.7 B 37.7 C 60.0 D 95.4 T4 Chapter 3.4 Body Mass Index (BMI) BMI = 60 ÷ (1.59)² = 23.7.
4 Diagram 3 shows a Green Technology application method for managing food waste to produce an agricultural product. Which of the following is related to the method? flag bookmark A Prevention and reduction B Sorting and recycling household waste C Treatment and processing (biological process) D Refuse, Reduce, Reuse, Recycle and Recovery (5R) T4 Chapter 4.3 Waste and Wastewater Management Sector The porous barrel uses microorganisms to decompose food waste into compost, which is a biological treatment and processing method.
5 Which of the following is a greenhouse gas? flag bookmark A Nitrogen oxide B Sulphur dioxide C Carbon monoxide D Sulphur trioxide T4 Chapter 4.5 Transportation Sector Carbon monoxide is the greenhouse gas because it can absorb and trap heat in the atmosphere. The other listed gases—nitrogen oxide, sulphur dioxide, and sulphur trioxide—are not greenhouse gases.
6 Which of the following is the genotype for individual suffered from Turner syndrome? flag bookmark A 44 + XX B 44 + XO C 44 + XY D 44 + XXY T4 Chapter 5.3 Mutation Turner syndrome occurs when a female has only one X chromosome, so the karyotype is 44 + XO instead of the normal 44 + XX.
7 Table 1 shows the genotypes of two couples who have different hair colors. | Couples | Father's genotype | Mother's genotype | | --- | --- | --- | | P | HH | hh | | Q | hh | hh | Key: H: Black hair; h: Blonde hair What is the probability ratio of black hair to blonde hair in the second filial generation (F₂) when the child of couple P marries the child of couple Q? flag bookmark A 1 : 1 B 3 : 1 C 1 : 3 D 4 : 0 T4 Chapter 5.2 Inheritance Cross between child of couple P (Hh) and child of couple Q (hh) gives Hh and hh in equal proportions, so black to blonde ratio is 1 : 1.
8 Which of the following is an example of discontinuous variation? flag bookmark A Type of blood group B Height C Body weight D Size of sole T4 Chapter 5.5 Variation Blood group has distinct, separate categories with no intermediate forms, so it is discontinuous variation. Height, body weight, and sole size show a continuous range of values.
9 Diagram 4 shows the movement of muscles to bend the arm. Which of the following is correct? flag bookmark A Muscle N: Contract; Muscle M: Contract B Muscle N: Contract; Muscle M: Relax C Muscle N: Relax; Muscle M: Relax D Muscle N: Relax; Muscle M: Contract T4 Chapter 6.2 Human Movement and Growth Bending the arm needs the biceps (Muscle N) to contract and shorten, pulling the forearm up, while the triceps (Muscle M) relaxes and lengthens. So N contracts and M relaxes.
10 Diagram 5 shows the additional support for a plant. Which of the following is an additional support for the plant? flag bookmark A Clasping roots B Hollow stems C Prop roots D Tendrils T4 Chapter 6.3 Support, Growth and Stability in Plants The diagram shows a thin, coiled tendril gripping the support stick. Tendrils are modified leaves or stems that twist around a support to hold the plant upright, so they are the additional support shown.