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Quiz Chapter 1: Stimuli and Responses

10 questions ยท Form 3 Science Bab 1: Stimuli and Responses

Question 1 of 10Score: 0

Insects like female moths release specific chemical signals to attract male mates across long distances. These chemicals are called:

Full Question List & Answer Key

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1. Insects like female moths release specific chemical signals to attract male mates across long distances. These chemicals are called:

  1. Hormones
  2. Enzymes
  3. Pheromones
  4. Neurotransmitters
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Answer: C

Pheromones are biochemical signals secreted externally by animals to influence the behavior of other individuals of the same species.

2. Which receptor in the human skin is situated deepest within the dermis layer?

  1. Pain receptor
  2. Touch receptor
  3. Pressure receptor
  4. Cold receptor
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Answer: C

Pressure receptors lie in the deepest part of the dermis to detect heavy force and pressure.

3. Which component forms part of the central nervous system in humans?

  1. Spinal nerves
  2. Cranial nerves
  3. Spinal cord
  4. Sensory receptors
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Answer: C

The central nervous system consists of the brain and the spinal cord.

4. Which photoreceptor cells in the human retina are responsible for color vision in bright light?

  1. Rod cells
  2. Cone cells
  3. Olfactory cells
  4. Ciliary cells
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Answer: B

Cone cells are sensitive to color (red, green, blue) in bright light, whereas rod cells detect light intensity in dim light.

5. Which visual characteristic is typical of monocular vision in animals?

  1. A narrow field of vision with high 3D depth perception
  2. A wide field of vision with minimal overlap between two eyes
  3. Both eyes located at the front of the skull
  4. Ability to estimate distance accurately when catching prey
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Answer: B

Monocular vision features eyes on opposite sides of the head, offering a broad field of view to spot incoming predators.

6. What type of lens is used to correct astigmatism?

  1. Biconcave lens
  2. Cylindrical lens
  3. Convex lens
  4. Planoconvex lens
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Answer: B

Astigmatism is caused by irregular curvature of the cornea or lens and is corrected using cylindrical lenses.

7. How do bats navigate and hunt effectively in complete darkness?

  1. By sensing electric fields emitted by prey
  2. By producing ultrasound waves for echolocation
  3. By utilizing lateral line pressure organs
  4. By relying on sensitive infrared heat receptors
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Answer: B

Bats emit ultrasound pulses that bounce off obstacles and prey, using echolocation to create a mental spatial map.

8. The response of plant roots growing towards water is known as positive:

  1. Geotropism
  2. Phototropism
  3. Hydrotropism
  4. Thigmotropism
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Answer: C

Growth towards water is positive hydrotropism, helping roots absorb water and minerals from soil.

9. Which organism relies on thigmotropism to climb structures for sunlight exposure?

  1. Maize plant roots
  2. Cucumber vine tendrils
  3. Mimosa pudica leaves
  4. Venus flytrap lobes
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Answer: B

Cucumber vines use tendrils that cling and wrap around supports upon contact (thigmotropism).

10. Which of the following animals possesses stereoscopic (binocular) vision?

  1. Rabbit
  2. Pigeon
  3. Tiger
  4. Deer
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Answer: C

Predatory animals like tigers have eyes at the front of their heads, enabling stereoscopic vision for depth perception while hunting.

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