IGCSE Biology Paper-3: Specimen Questions with Answers 124 - 130 of 230
Passage
Picture shows a food web.
Figure Shows a Typical Food Web
A food web which shows how an organism is depend on other organism for energy
Question number: 124 (1 of 2 Based on Passage) Show Passage
Write in Short
If all the wood mice were killed?
Explanation
Population of corn will increase
Question number: 125 (2 of 2 Based on Passage) Show Passage
Write in Short
If all the wood mice were killed why would the number of foxes likely decrease?
Explanation
Fox feed wood mouse in such food web; if wood mice were, killed foxes will get less food. So they will decrease in number.
Passage
The diagram shows different steps of a cycle
The Given Figure Show a Hydrological Cycle
Figure shows how water molecule transfer from different factors
Question number: 126 (1 of 2 Based on Passage) Show Passage
Write in Short
Name the cycle of given diagram
Explanation
Hydrological cycle or water cycle
Question number: 127 (2 of 2 Based on Passage) Show Passage
Write in Short
How many processes occur from stage S to stage P?
Explanation
Two processes takes place from stage S to P. First, is evaporation and second is condensation
Question number: 128
Write in Short
What do you mean by Malacophily
Explanation
When Snails and slugs are responsible for flower pollination.
Question number: 129
Write in Short
List two producers name and three consumers name from given food web
Shows Food Web of Forest Ecosystem with Various Food Chains
In above picture many food chains are interconnected with each other in which many producers and consumers are present.
Explanation
Producers- Oak tree, Grass
Consumer-deer, wolf, rabbit, squirrel
Question number: 130
Write in Short
Table shows one difference between self-pollination and cross-pollination. Complete Table by listing three more differences.
| Self-pollination | Cross pollination |
| 1. Transfer of pollen grain from anther to the stigma of same flower | 1. Transfer of pollen from anther of one flower to the stigma of genetically different flower |
| 2. |
Explanation
| Self-pollination | Cross pollination |
| 1. Transfer of pollen grain from anther to the stigma of same flower | 1. Transfer of pollen from anther of one flower to the stigma of genetically different flower |
| 2. Plant become homozygous | 2. Plant remains heterozygous |
| 3. Highly useful characters are preserved | 3. Unable to preserve highly useful characters |
| 4. It produce pure lines | 4. Variations occur in cross pollination |