1. Stretch marks occur when

A. The dermis layer becomes inflamed
B. The dermis layer becomes inflamed
C. The dermis layer tears due to rapid stretching
D. Sebaceous glands become clogged

Correct answer: C

Rationale: Stretch marks occur when the dermis layer tears due to rapid stretching. During periods of rapid growth or weight gain, the skin may stretch beyond its capacity, causing the dermis layer to tear and resulting in the formation of stretch marks. Inflammation or clogged sebaceous glands do not directly cause stretch marks, making options A, B, and D incorrect. It is important to understand the physiological process behind stretch marks to identify the correct answer.

2. Nuclear fission is a process characterized by:

A. A heavy nucleus capturing a neutron and releasing energy
B. The fusion of two nuclei to form a heavier element
C. A lighter element emitting an alpha particle through radioactive decay
D. An electron being absorbed by the nucleus with the release of a gamma ray

Correct answer: A

Rationale: Nuclear fission is a process characterized by a heavy nucleus capturing a neutron and splitting into smaller nuclei, releasing a significant amount of energy in the form of heat and radiation. This differs from nuclear fusion, which involves the merging of two lighter nuclei to form a heavier element. The emission of an alpha particle by a lighter element is a form of radioactive decay, not fission. Absorption of an electron by the nucleus with the release of a gamma ray is not representative of fission reactions. Therefore, option A correctly describes the process of nuclear fission.

3. Identify the bone with the greatest length in the human body.

A. Femur (Thigh bone)
B. Humerus (Upper arm bone)
C. Tibia (Shin bone)
D. Scapula (Shoulder blade)

Correct answer: A

Rationale: The femur, exceeding a meter in length, bears significant weight and enables locomotion.

4. Beta waves, associated with alertness and focused attention, typically fall within the range of:

A. 0.5-4 Hz
B. 4-8 Hz
C. 8-13 Hz
D. 13-30 Hz

Correct answer: D

Rationale: Beta waves are neural oscillations in the brain that are associated with alertness, concentration, and active thinking. They typically fall within the frequency range of 13-30 Hz. This range is indicative of a person being awake, alert, and engaged in cognitive tasks requiring focus. Lower frequency ranges like 0.5-4 Hz (Delta waves) are associated with deep sleep and unconsciousness, while higher ranges like 8-13 Hz (Alpha waves) are linked to a relaxed and meditative state. Therefore, option D (13-30 Hz) is the correct range for beta waves, reflecting the brain's heightened activity during periods of attentiveness and concentration.

5. What property of a wave is measured in Hertz (Hz)?

A. Amplitude
B. Wavelength
C. Speed
D. Frequency

Correct answer: d

Rationale: Frequency, the number of oscillations per second, is measured in Hertz (Hz).

6. He emphasizes to the team that they need to put their efforts together towards the attainment

A. Span of control
B. Unity of direction
C. Unity of command
D. Command responsibility

Correct answer: B

Rationale: The correct answer is B: Unity of direction. Unity of direction is a principle of management which states that all activities within an organization should be directed towards the same objectives. In this scenario, the leader is stressing the importance of aligning the team's efforts towards a common goal or objective. This ensures that everyone is working towards a shared purpose, avoiding conflicting or contradictory actions. Span of control refers to the number of subordinates a manager can effectively supervise. Unity of command relates to the principle that employees should receive orders from only one supervisor to avoid confusion and conflict. Command responsibility is a term often used in the context of accountability for actions taken under one's command. Therefore, the most appropriate concept in this context is Unity of direction.