Origin And History Of Life - Principles of Biology | Biology+

Course

Introductory Biology

Study Pack

Set 1: An Introduction to Biology

Set 2: The Chemical Basis of Life I: Atoms, Molecules, and Water

Set 3: The Chemical Basis of Life II: Organic Molecules

Set 4: General Features of Cells

Set 5: Membrane Structure, Transport, and Cell Junctions

Set 6: Energy, Enzymes, and Cellular Respiration

Set 7: Photosynthesis

Set 8: Cell Communication

Set 9: Nucleic Acid Structure, DNA Replication, and Chromosome Structure

Set 10: Gene Expression at the Molecular Level

Set 11: Gene Regulation

Set 12: Mutation, DNA Repair, and Cancer

Set 13: The Eukaryotic Cell Cycle, Mitosis, and Meiosis

Set 14: Patterns of Inheritance

Set 15: Genetics of Viruses and Bacteria

Set 16: Genetic Technology

Set 17: Genomes, Repetitive Sequences, and Bioinformatics

Set 18: Origin and History of Life

Set 19: An Introduction to Evolution and Population Genetics

Set 20: Origin of Species and Macroevolution

Set 21: Taxonomy and Systematics

Set 22: Microorganisms: The Archaea, Bacteria, and Protists

Set 25: Animal Diversity: Invertebrates

Set 26: Animal Diversity: Vertebrates

Set 27: An Introduction to Flowering Plant Form and Function

Set 28: Flowering Plants: Plant Behavior

Set 29: Flowering Plants: Nutrition and Transport

Set 30: Flowering Plants: Reproduction

Set 31: Animal Bodies and Homeostasis

Set 32: Neuroscience I: Structure, Function, and Evolution of Nervous Systems

Set 33: Neuroscience II: Sensory Systems

Set 34: Muscular-Skeletal Systems

Set 35: Digestive Systems and Nutrition

Set 36: Circulatory Systems

Set 37: Respiratory Systems

Set 38: Excretory Systems and the Homeostasis of Internal Fluids

Set 39: Endocrine Systems

Set 40: Animal Reproduction and Development

Set 41: Immune Systems

Set 42: Animal Behavior

Set 43: Ecology and the Physical Environment

Set 44: Population Ecology

Set 45: Community Ecology

Set 46: Ecosystem Ecology

Set 47: Biodiversity and Conservation Biology

Set 18 Origin And History Of Life

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Set 18 Origin And History Of Life

(Multiple Choice)

Free

According to the most widely accepted hypothesis,the origin of the nuclear genome involved:

A)an endosymbiotic relationship between an archaeon and a bacterium
B)an endosymbiotic relationship between two archaeons
C)an endosymbiotic relationship between two bacterium
D)a symbiotic relationship between an archaeon and a bacterium
E)a symbiotic relationship between two archaeons

Answer

(Multiple Choice)

Free

Protobionts are thought to be the first nonliving structures that evolved into living cells.A critical characteristic of a protobiont that is found in both modern day prokaryotes and eukaryotes is

A)internal compartments that subdivide metabolic functions.
B)a boundary membrane that separates external from internal environments.
C)the ability to exclude all organic substances.
D)the ability to fuse with any other protobiont for reproduction.
E)the ability to recognize other protobionts for developmental purposes.

Answer

(Multiple Choice)

Free

Scientist believe that the formation of organic polymers,like RNA and DNA,had to move from the watery environment of the seas to solid surfaces or evaporating tidal pools because

A)dehydration is necessary for the formation of large organic polymers,too much water competes with dehydration.
B)hydrolysis is necessary for the formation of large organic polymers,dehydration competes with polymerization.
C)tidal pools would provide a concentrated area where more small organic molecules could aggregate.
D)Kusky discovered 1.43 billion year old fossils in shallow water and tidal pools.
E)sugars dissolve in water,ribose is a sugar and is necessary for the polymerization of DNA and RNA therefore being out of the water would speed up the polymerization reactions.

Answer