Jamb Biology Past Questions For Year 2021
Question 6
When a Spirogyra cell is immersed in a salt solution more concentrated than its cell sap, it?
- A. remains unchanged
- B. takes tip water and burst
- C. absorbs a little water
- D. loses water and shrivels
Question 7
Flatworms and roundworms are said to be invertebrates because?
- A. they are small animals
- B. they can live inside the vertebrates
- C. some of them are unicellular
- D. they have no backbones
Question 8
Choose the sequence which represents the correct order of organisms in a food chain
- A. Grass, snake, toad, grasshopper, hawk
- B. Grass, grasshopper, toad, snake, hawk
- C. Grass, grasshopper, snake, toad, hawk.
- D. Grass, snake, grasshopper, toad, hawk
Question 9
In the mammalian respiratory system. exchange of gases occurs in the?
- A. lungs
- B. bronchi
- C. bronchioles
- D. alveoli
Question 10
In demonstrating the importance of mineral elements in plants, the culture bottle must be darkened to?
- A. prevent algal growth in culture solution
- B. allow root growth
- C. prevent breakdown of mineral elements
- D. prevents photosynthesis in the root
