11. Which type of cells has no nucleus?
(a) Red blood cells
(b) Nerve cells
(c) White blood cells
(d) None of these
12. White blood cells are also known as
(a) Leucocytes
(b) Thrombocytes
(c) Erythrocytes
(d) None of these
13. Red blood cells (RBC) are also known as
(a) Erythrocytes
(b) Thrombocytes
(c) Leucocytes
(d) None of these
14. What percent of blood is constituted by Erythrocytes, leucocytes and platelets?
(a) 25 percent
(b) 35 percent
(c) 45 percent
(d) 65 percent
15. The first sign of life made its appearance on the earth about:
(a) 1 million years ago
(b) 500 million years ago
(c) 1 billion or 1000 million years ago
(d) 3 billion years ago
16. When the earth was formed it had an atmosphere with:
(a) Hydrogen, Oxygen and Nitrogen
(b) Water vapor, Hydrogen and Oxygen
(c) Oxygen, Carbon Dioxide and Nitrogen
(d) Water vapor, Ammonia and Methane
17. Biochemical origin of life was discovered by
(a) Haldane
(b) Muller
(c) Carin
(d) Darwin
18. A group of cells that work together to perform a function is called what?
(a) Cell system
(b) Organ system
(c) Organ
(d) Tissue
19. Which of the following terms is NOT a category for biological classification?
(a) Kingdom
(b) Order
(c) Phylum
(d) Composition
20. Fungi absorb the nutrients from dead organisms. In the Animal kingdom, fungi are known as what?
(a) Producers
(b) Absorbers
(c) Consumers
(d) Decomposers