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Organisms can be classified by the five kingdom or three domain method - Edexcel - GCSE Biology Combined Science - Question 3 - 2019 - Paper 1
Question 3
Organisms can be classified by the five kingdom or three domain method. i) What is the name of the domain that plants belong to? A Eukarya B Archaea C Monera D Pro... show full transcript
Worked Solution & Example Answer:Organisms can be classified by the five kingdom or three domain method - Edexcel - GCSE Biology Combined Science - Question 3 - 2019 - Paper 1
Step 1
i) What is the name of the domain that plants belong to?
Answer
The domain that plants belong to is Eukarya. This domain encompasses all organisms with eukaryotic cells, which have a defined nucleus and other membrane-bound organelles. Plants, animals, fungi, and protists are included in this domain.
Step 2
ii) What happens in a chloroplast?
Answer
In a chloroplast, the following occurs:
- Oxygen is produced, and sunlight is absorbed by chlorophyll. During the process of photosynthesis, chlorophyll captures sunlight, which is then used to convert carbon dioxide and water into glucose and oxygen. Overall, the equation for photosynthesis can be summarized as follows:
Step 3
iii) Give a reason why the three domain method of classification has been suggested.
Answer
The three domain method of classification has been suggested for several reasons:
- Genetic differences: The method recognizes fundamental genetic differences between groups, particularly between prokaryotic and eukaryotic organisms.
- Evolutionary relationships: It reflects the evolutionary relationships and lineage diversification better than the traditional five kingdom system.
- Cellular organization: It categorizes organisms based on cellular organization and genetic material structure, leading to a more accurate classification.