1. Viruses are pathogens of the following diseases except 45

2. Use the following information to answer Questions 54 and 55. In an experiment, a red-flowered plant was crossed with another red-flowered plant and the following results were obtained: 448 red flowers and 154 white flowers in the F1 generation. Which of the following represents the genotypes of the parents if R is for red gene and r for white gene? 54

3. Which of the following is not correct about human cell? WAEC 2003 QST 1

4. Which of the following structures of the human body provides the best surface for diffusion? 13

5. The term ecosystem refers to 35