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Bryson Chapter Questions

Category: Critical Essay

Subcategory: Biology

Level: High School

Pages: 1

Words: 275

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Bryson chapter questions
Chapter 19: The rise of life
Q1
Life gradually arose from monomers with building blocks like amino acids being formed and finally combining to make a complex polymer (Bryson, Bill, and William, 289). Organic molecules required for life can be formed from inorganic components. It is important to understand that the first life was accompanied by polymers assembling structures or units that were able to replicate and sustain themselves.
Q2
Cyanobacteria are essential materials for the development and health of numerous plants. Cyanobacteria have a blue pigment that is called phycocyanin that captures light for photosynthesis. They also possess chlorophyll a, a photosynthesis pigment that plants use. Cyanobacteria, therefore, help in photosynthesis of plants hence crop production. Cyanobacteria are a small group of organism that can transform nitrogen in the atmosphere to ammonia and nitrate (Bryson, Bill, and William, 289). Plants need this fixed nitrogen forms for their growth. Oxygen using organism benefit from this change of environment in that in the process of converting inert atmospheric nitrogen to nitrate or ammonia oxygen is produced; hence these organisms have more oxygen to use. Cyanobacteria turned an oxygen-free atmosphere to significant quantities of oxygen.
Q3
Stromatolites are objects that resemble rocks and are produced in shallow waters by micro-organism living with single cells or by cyanobacte…

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