Biology – Multiple Choice Questions (MCQs)

1. 61. What is an animal?

   • A. A unicellular organism
   • B. A multicellular eukaryotic organism that obtains food by consuming other organisms
   • C. A photosynthetic organism
   • D. A type of bacteria

2. 62. What is the human digestive system responsible for?

   • A. Transporting oxygen
   • B. Filtering blood
   • C. Breaking down food into nutrients
   • D. Coordinating body movements

3. 63. What is the human respiratory system responsible for?

   • A. Transporting nutrients
   • B. Exchanging gases (oxygen and carbon dioxide)
   • C. Filtering waste from the blood
   • D. Producing hormones

4. 64. What is the human circulatory system responsible for?

   • A. Breaking down food
   • B. Transporting oxygen
   • C. nutrients
   • D. and waste products

5. 65. What is the human nervous system responsible for?

   • A. Producing hormones
   • B. Providing structural support
   • C. Transmitting signals between different parts of the body
   • D. Digesting food

6. 66. What is the human excretory system responsible for?

   • A. Transporting oxygen
   • B. Removing waste products from the body
   • C. Producing hormones
   • D. Controlling body movements

7. 67. What is the human skeletal system responsible for?

   • A. Transporting blood
   • B. Protecting internal organs and providing support
   • C. Producing energy
   • D. Controlling body temperature

8. 68. What is the human muscular system responsible for?

   • A. Transporting nutrients
   • B. Exchanging gases
   • C. Enabling movement
   • D. Filtering waste

9. 69. What is the human endocrine system responsible for?

   • A. Transmitting nerve signals
   • B. Producing hormones that regulate various body functions
   • C. Digesting food
   • D. Filtering blood

10. 70. What is the human reproductive system responsible for?

    • A. Transporting oxygen
    • B. Producing offspring
    • C. Digesting food
    • D. Controlling movement