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Multiple Choice
Which type of organism was responsible for photosynthesis before the evolution of plants?
A
Protozoa
B
Cyanobacteria
C
Fungi
D
Algae
Verified step by step guidance
1
Understand the concept of photosynthesis: Photosynthesis is the process by which organisms convert light energy into chemical energy, typically producing oxygen as a byproduct.
Identify the types of organisms capable of photosynthesis: Before the evolution of plants, certain microorganisms were responsible for photosynthesis.
Explore the role of cyanobacteria: Cyanobacteria, also known as blue-green algae, are among the earliest organisms known to perform photosynthesis. They played a crucial role in oxygenating the Earth's atmosphere.
Differentiate between cyanobacteria and other microorganisms: Unlike protozoa and fungi, cyanobacteria have the ability to perform photosynthesis due to their chlorophyll content.
Consider the evolutionary timeline: Cyanobacteria existed long before the evolution of plants and were pivotal in shaping the Earth's environment, making them the primary photosynthetic organisms before plants.