All Free Analytical and Logical Reasoning MCQs with Answers

Every Analytical and Logical Reasoning question in the bank, across all chapters, each with the correct answer and a written explanation. Free and unlimited, with no account needed.

2,989 questions · page 109 of 150

2163. Predation is an interaction between individuals of 2 species in which one is harmed (the prey), and the other is helped (the predator). Predation can occur among plants and animals as well as between plants and animals. Some biologists contend that herbivores, or plant eaters, are predators. Table 1 indicates some characteristics and examples of certain predators. Predation is very important in maintaining a natural balance in any given ecosystem. For example, without predators, prey populations tend to grow exponentially. Without prey, predator populations tend to decline exponentially. Predators consume individual members of the prey population, thereby controlling the overall numbers in the ecosystem. The number of prey consumed depends on the number of prey present as well as the number of predators present. The rate of change in the number of prey is a function of the birth of new prey minus the death of other prey, due either to predation or other causes. The death rate is assumed to depend on the number of prey available and the number of predators. The rate of change in the number of predators is a function of the births of new predators-which depends on the number of prey-minus the death of some predators. Over long periods of time, predator and prey tend to balance each other out. This is called the predator-prey cycle. Prey numbers will increase when predator numbers decrease. When the number of prey reaches a certain point, predators will start to increase until they eat enough prey to cause a decline in prey numbers. When this happens, the number of predators will begin to decrease because they can't find enough prey to eat, and the cycle will begin again. Figure 1 represents an example of a predator-prey cycle.Based on information in the passage and in Table 1, an herbivore is:

  • A. A predator only
  • B. Both a parasite and a predator
  • C. Prey only
  • D. Both a predator and prey

Explanation: The best answer is d. Table 1 lists characteristics of certain predators.

Correct answer: Both a predator and prey

2164. Predation is an interaction between individuals of 2 species in which one is harmed (the prey), and the other is helped (the predator). Predation can occur among plants and animals as well as between plants and animals. Some biologists contend that herbivores, or plant eaters, are predators. Table 1 indicates some characteristics and examples of certain predators. Predation is very important in maintaining a natural balance in any given ecosystem. For example, without predators, prey populations tend to grow exponentially. Without prey, predator populations tend to decline exponentially. Predators consume individual members of the prey population, thereby controlling the overall numbers in the ecosystem. The number of prey consumed depends on the number of prey present as well as the number of predators present. The rate of change in the number of prey is a function of the birth of new prey minus the death of other prey, due either to predation or other causes. The death rate is assumed to depend on the number of prey available and the number of predators. The rate of change in the number of predators is a function of the births of new predators-which depends on the number of prey-minus the death of some predators. Over long periods of time, predator and prey tend to balance each other out. This is called the predator-prey cycle. Prey numbers will increase when predator numbers decrease. When the number of prey reaches a certain point, predators will start to increase until they eat enough prey to cause a decline in prey numbers. When this happens, the number of predators will begin to decrease because they can't find enough prey to eat, and the cycle will begin again. Figure 1 represents an example of a predator-prey cycle.Based on Figure 1, during the first year, predator numbers were mostly:

  • A. Higher than prey numbers.
  • B. Lower than prey numbers.
  • C. Equal to prey numbers.
  • D. Unable to be determined.

Explanation: The best answer is a. According to Figure 1, predators are indicated by a series of x's.

Correct answer: Higher than prey numbers.
  • A. No, because a deer is an herbivore, which means it eats all plants
  • B. No, because a deer is a carnivore and does not eat plants
  • C. Yes, because a deer is an herbivore, and herbivores can be selective eaters
  • D. Yes, because a deer is a prey animal, so it must use caution when eating

Explanation: The best answer is C. According to Table 1, a deer is a herbivore, so eliminate answer choice B.

Correct answer: Yes, because a deer is an herbivore, and herbivores can be selective eaters
  • A. Crinoid.
  • B. Holothurian.
  • C. Ophiuroid.
  • D. Asteroid.

Explanation: The correct answer is 'Asteroid.' Asteroids, known as starfish, are predatory echinoderms using their tube feet for motion and are located…

Correct answer: Asteroid.
  • A. Cell organelles
  • B. The flight pattern of birds
  • C. Movement of stars in galaxies
  • D. Old manuscripts
  • E. Human vision defects

Explanation: Binoculars are optical instruments designed for observing distant objects by magnifying them, making them ideal for birdwatching and…

Correct answer: The flight pattern of birds
  • A. 1°C/sec.
  • B. 10°C/sec.
  • C. 5°C/sec.
  • D. 40°C/sec.

Explanation: To answer this question, look at Figure 1. Between 0 and 2 seconds, the thermometer in the 40° water registered a temperature increase…

Correct answer: 5°C/sec.
  • A. BCC, HCP, FCC
  • B. BCC, FCC, HCP
  • C. FCC, HCP, BCC
  • D. HCP, BCC, FCC

Explanation: The correct sequence is Option A: BCC, HCP, FCC. The BCC structure is characterized by atoms at each corner and one in the center of the…

Correct answer: BCC, HCP, FCC
  • A. 112V
  • B. 62V
  • C. 58V
  • D. 280V

Explanation: Given:Step 1: Simplify the parallel part (R₂, R₃, R₄)These 3 resistors are in parallel between b and the left of R₅:Use formula for…

Correct answer: 62V
  • A. Direction of (2) and (5)
  • B. Direction of (1) and (2)
  • C. Direction of (1), (3) and (5)
  • D. Direction of (1), (2) and (5)

Explanation: When gear (2) moves clockwise, gear (3) will move counterclockwise, and gear (4) will move clockwise again, matching the direction of gear…

Correct answer: Direction of (2) and (5)
  • A. Both move anti-clockwise.
  • B. Anti-clockwise and clockwise respectively.
  • C. Clockwise and anti-clockwise respectively.
  • D. Both move clockwise.

Explanation: In a typical mechanical setup with gears, the direction of movement is determined by the engagement of these gears.

Correct answer: Clockwise and anti-clockwise respectively.
  • A. High resistivity
  • B. Magnetic properties
  • C. Good conductivity and ductility
  • D. Reacts with water

Explanation: Copper is used in household wiring primarily because of its excellent electrical conductivity and ductility.

Correct answer: Good conductivity and ductility
  • A. Thermal expansion
  • B. Gravity
  • C. Condensation
  • D. Capillary action

Explanation: The rise of mercury in a thermometer is primarily due to thermal expansion.

Correct answer: Thermal expansion
  • A. Trial 1, Trial 2, Trial 3
  • B. Trial 3, Trial 2, Trial 1
  • C. Trial 2, Trial 1, Trial 3
  • D. Trial 3, Trial 1, Trial 2

Explanation: The correct order is Trial 3, Trial 2, Trial 1 because when running trials simultaneously on parallel setups, Trial 3 will reach point B…

Correct answer: Trial 3, Trial 2, Trial 1