Nokea
What is Diffusion?
- A. Movement of materials from low concentration to high concentration
- B. Movement of materials from high concentration to low concentration
- C. Absorption of nutrients
- D. Breaking of materials
Correct Answer: B
Rationale: Diffusion is the process where substances move from an area of high concentration to an area of low concentration. This movement occurs due to the random motion of particles and continues until equilibrium is reached. Choice A is incorrect because diffusion occurs down the concentration gradient, from high to low concentration, not from low to high concentration. Choice C is incorrect as it refers to the uptake of substances by cells, not the general process of diffusion. Choice D is incorrect as it does not accurately describe the process of diffusion; diffusion involves the movement of substances, not the breaking of materials.
You may also like to solve these questions
A symptom that is exacerbated is ______
- A. Improving
- B. Made worse
- C. Stayed the same
- D. Ameliorated
Correct Answer: B
Rationale: The correct answer is B, 'Made worse.' When a symptom is exacerbated, it means that it is becoming more severe or intense. Choices A, C, and D are incorrect. A is the opposite of exacerbated as improving means getting better, C means remaining unchanged, and D means to make something better or improve, which is the opposite of exacerbate.
What is the term for the lower surface of a structure?
- A. Inferior
- B. Transverse
- C. Dorsal
- D. Ventral
Correct Answer: D
Rationale: The term for the lower surface of a structure is 'ventral.' 'Ventral' is used in anatomy to describe the front or lower surface of an organism or structure. In this context, 'inferior' (choice A) is not the correct term as it generally refers to something being below or lower in position but not specifically the lower surface of a structure. 'Transverse' (choice B) refers to a crosswise direction, not the lower surface. 'Dorsal' (choice C) is the term used for the upper or back surface of an organism or structure, opposite to the ventral surface.
What does the term 'viscous' mean?
- A. Thick and sticky
- B. Slimy
- C. Watery
- D. Dry
Correct Answer: A
Rationale: The correct answer is A: 'Thick and sticky.' Viscous describes a substance that is thick and sticky, resisting flow easily. Choices B, C, and D are incorrect. 'Slimy' implies a slippery, gooey texture; 'Watery' describes a substance with a thin, fluid consistency; and 'Dry' indicates the absence of moisture.
John Kennedy was a senator before he _____ President in 1960.
- A. was elected
- B. became
- C. was made
- D. become
Correct Answer: A
Rationale: The correct answer is 'was elected.' This choice is the most appropriate as it correctly indicates the action of being chosen through a voting process in the past. In this context, 'was elected' is the right verb form to show that John Kennedy became President in 1960 after winning an election. The other choices are incorrect: 'became' is a simple past verb form that doesn't convey the electoral process, 'was made' implies a passive action rather than an active election, and 'become' is not the correct past tense form needed in this sentence.
He tried to remember the names of all the people who were there that night.
- A. that
- B. who
- C. which
- D. whom
Correct Answer: B
Rationale: In this context, 'who' is the correct relative pronoun to refer to people. 'That' is used for things, 'which' is used for animals or things, and 'whom' is an object pronoun, not needed in this sentence. Therefore, 'who' is the most appropriate choice.