Why do unicellular organisms have less need for a complex transport system?
Answer and explanation
Correct answer: A single cell can exchange materials directly with the environment
The governing concept is the relationship between organism size and material exchange. A unicellular organism consists of one cell, and its cell membrane is directly exposed to the surrounding medium. Oxygen and dissolved nutrients can enter, while carbon dioxide and other wastes can leave, largely by diffusion. Because there are no distant tissues or organ systems to supply, a complex internal transport network is unnecessary. Thus option A is correct.
Frequently asked questions
What is the correct answer to this question?
A single cell can exchange materials directly with the environment
Why is this the correct answer?
The governing concept is the relationship between organism size and material exchange. A unicellular organism consists of one cell, and its cell membrane is directly exposed to the surrounding medium. Oxygen and dissolved nutrients can enter, while carbon dioxide and other wastes can leave, largely by diffusion. Because there are no distant tissues or organ systems to supply, a complex internal transport network is unnecessary. Thus option A is correct.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Life Processes.
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