“Cambrian period” was present between the 543-490 MYA period in the Geological Timescale. Many organisms existed and evolve during this period like red-green algae, sponges, jellyfishes, and worms. This led to the accumulation of oxygen in the air by the metabolic reactions inside the cells like photosynthesis. The endosymbiotic theory explains the fusion of the blue-green algae with the unicellular eukaryotes leading to the formation of multicellular organisms. Various varieties of insects arose like trilobites and brachiopods.

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Chapter 15, Problem 6MCQ

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Introduction:

“Cambrian period” was present between the 543-490 MYA period in the Geological Timescale. Many organisms existed and evolve during this period like red-green algae, sponges, jellyfishes, and worms. This led to the accumulation of oxygen in the air by the metabolic reactions inside the cells like photosynthesis. The endosymbiotic theory explains the fusion of the blue-green algae with the unicellular eukaryotes leading to the formation of multicellular organisms. Various varieties of insects arose like trilobites and brachiopods.

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Chapter 15, Problem 6MCQ

Summary Introduction

Introduction:

“Cambrian period” was present between the 543-490 MYA period in the Geological Timescale. Many organisms existed and evolve during this period like red-green algae, sponges, jellyfishes, and worms. This led to the accumulation of oxygen in the air by the metabolic reactions inside the cells like photosynthesis. The endosymbiotic theory explains the fusion of the blue-green algae with the unicellular eukaryotes leading to the formation of multicellular organisms. Various varieties of insects arose like trilobites and brachiopods.

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Answer 3

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Chapter 15, Problem 6MCQ

Summary Introduction

Introduction:

“Cambrian period” was present between the 543-490 MYA period in the Geological Timescale. Many organisms existed and evolve during this period like red-green algae, sponges, jellyfishes, and worms. This led to the accumulation of oxygen in the air by the metabolic reactions inside the cells like photosynthesis. The endosymbiotic theory explains the fusion of the blue-green algae with the unicellular eukaryotes leading to the formation of multicellular organisms. Various varieties of insects arose like trilobites and brachiopods.

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Answer 4

Question

Chapter 15, Problem 6MCQ

Summary Introduction

Introduction:

“Cambrian period” was present between the 543-490 MYA period in the Geological Timescale. Many organisms existed and evolve during this period like red-green algae, sponges, jellyfishes, and worms. This led to the accumulation of oxygen in the air by the metabolic reactions inside the cells like photosynthesis. The endosymbiotic theory explains the fusion of the blue-green algae with the unicellular eukaryotes leading to the formation of multicellular organisms. Various varieties of insects arose like trilobites and brachiopods.

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Answer 5

Chapter 15, Problem 6MCQ

Summary Introduction

Introduction:

“Cambrian period” was present between the 543-490 MYA period in the Geological Timescale. Many organisms existed and evolve during this period like red-green algae, sponges, jellyfishes, and worms. This led to the accumulation of oxygen in the air by the metabolic reactions inside the cells like photosynthesis. The endosymbiotic theory explains the fusion of the blue-green algae with the unicellular eukaryotes leading to the formation of multicellular organisms. Various varieties of insects arose like trilobites and brachiopods.

Answer 6

Chapter 15, Problem 6MCQ

Summary Introduction

Introduction:

“Cambrian period” was present between the 543-490 MYA period in the Geological Timescale. Many organisms existed and evolve during this period like red-green algae, sponges, jellyfishes, and worms. This led to the accumulation of oxygen in the air by the metabolic reactions inside the cells like photosynthesis. The endosymbiotic theory explains the fusion of the blue-green algae with the unicellular eukaryotes leading to the formation of multicellular organisms. Various varieties of insects arose like trilobites and brachiopods.

Answer 7

Chapter 15, Problem 6MCQ

Summary Introduction

Introduction:

“Cambrian period” was present between the 543-490 MYA period in the Geological Timescale. Many organisms existed and evolve during this period like red-green algae, sponges, jellyfishes, and worms. This led to the accumulation of oxygen in the air by the metabolic reactions inside the cells like photosynthesis. The endosymbiotic theory explains the fusion of the blue-green algae with the unicellular eukaryotes leading to the formation of multicellular organisms. Various varieties of insects arose like trilobites and brachiopods.

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