The History Of Life On Earth - Biology A Guide to the Natural World | Biology+

Course

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Study Pack

Set 1: A Guide to the Natural World

Set 2: Chemistry, Water and PH

Set 3: Lifes Components: Biological Molecules

Set 4: Lifes Home: The Cell

Set 5: Lifes Border: The Plasma Membrane

Set 6: An Introduction to Energy

Set 7: Deriving Energy From Food

Set 8: Photosynthesis

Set 9: Genetics and Cell Division

Set 10: Preparing for Sexual Reproduction: Meiosis

Set 11: Mendel and His Discoveries

Set 12: Chromosomes and Inheritance

Set 13: Dna Structure and Replication

Set 14: Transcription Translation and Regulation

Set 15: Biotechnology

Set 16: Charles Darwin, Evolutionary Thought, and the Evidence for Evolution

Set 17: Microevolution

Set 18: Macroevolution

Set 19: The History of Life on Earth

Set 20: The Evolution of Human Beings

Set 21: The Diversity of Life 1

Set 22: The Diversity of Life 2

Set 23: The Diversity of Life 3

Set 24: An Introduction to Flowering Plants

Set 25: Form and Function in Flowering Plants

Set 26: The Integumentary Skeletal and Muscular Systems

Set 27: The Nervous and Endocrine System

Set 28: The Immune System

Set 29: Blood and Breath

Set 30: Digestion, Nutrition and Elimination

Set 31: Animal Development

Set 32: Human Reproduction

Set 33: Populations in Ecology

Set 34: Communities in Ecology

Set 35: Ecosystems and Biomes

Set 36: Animal Behavior

Set 19 The History Of Life On Earth

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Set 19 The History Of Life On Earth

(Multiple Choice)

Free

If a 10-mile-wide comet hit Earth, how would this likely affect the history of life?

A) A mass extinction would occur, followed by lots of evolutionary change among descendants of the survivors.
B) A slow climate warming and drying would begin, decreasing the biological diversity on Earth.
C) Continental drift would be reversed, and all the continents would slowly be pushed together again.
D) Most species would become extinct, and the rest would remain more or less unchanged.

Answer

(Multiple Choice)

Free

If you open a can of chicken noodle soup and immediately examine it microscopically, you will find no microorganisms. If you let the open can sit on the shelf for a few weeks and then examine it, you will find lots of microorganisms. The origin of these microorganisms is most likely:

A) improper sterilization of the soup prior to canning.
B) prebiotic evolution.
C) endosymbiotic microspheres.
D) airborne microorganisms.

Answer

(Multiple Choice)

Free

It is known that RNA can sometimes act as an enzyme for the synthesis of:

A) lipids.
B) proteins.
C) more RNA.
D) more DNA.

Answer