Multiple Choice
Which method is used to place fossils in layers of rock according to the order in which organisms evolved?
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1. Introduction to Biology
Introduction to Taxonomy
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Which of the following eukaryotic groups is characterized by having cell walls made primarily of chitin?
A
Plantae
B
Fungi
C
Protista
D
Animalia
Verified step by step guidance1
Understand the question: The problem is asking which eukaryotic group has cell walls primarily made of chitin. This requires knowledge of the structural components of cell walls in different eukaryotic groups.
Recall the characteristics of each group:
- Plantae: Cell walls are primarily made of cellulose.
- Protista: Some protists have cell walls, but their composition varies and is not primarily chitin.
- Animalia: Animals do not have cell walls.
- Fungi: Fungi are characterized by having cell walls made primarily of chitin.
Focus on the key term 'chitin': Chitin is a polysaccharide that provides structural support and is commonly found in fungal cell walls. It is distinct from cellulose, which is found in plant cell walls.
Eliminate incorrect options: Based on the structural composition of cell walls, eliminate Plantae, Protista, and Animalia as they do not have cell walls made of chitin.
Conclude that the correct answer is Fungi: Fungi are the eukaryotic group characterized by having cell walls made primarily of chitin.
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