The Origins of Life

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Which of the following is a necessary compound for life on Earth?

Nitrogen

Oxygen

Carbon dioxide (correct)

Helium

What is the role of water in the development of life on Earth?

It serves as a source of energy for life forms

It helps in the growth and reproduction of life forms

It provides a liquid solvent for ingredients to react with each other (correct)

It acts as a protective barrier for life forms

What were the conditions like on the young planet Earth when the first life forms emerged?

Completely devoid of any environmental conditions

Ideal for living things

Hostile with extreme temperatures (correct)

Moderate and stable

What is the source of energy for all life forms?

Sunlight Signup and view all the answers

What are autotrophs?

Life forms that can convert sunlight into energy Signup and view all the answers

What are the basic necessities for any life form?

Elements and compounds essential to life including hydrogen, methane, nitrogen, carbon dioxide, phosphates, and ammonia, and a liquid solvent: water. Signup and view all the answers

What is the role of water in the development of life on Earth?

Water is a liquid solvent that allows the necessary ingredients for life to comingle and react with each other. Signup and view all the answers

What gave rise to every species that has inhabited Earth?

The simple organic compounds that assembled into more complex coalitions and were the first life on Earth. Signup and view all the answers

What were the conditions like on the young planet Earth when the first life forms emerged?

The young planet had widespread volcanic activity and an atmosphere that created hostile conditions. Signup and view all the answers

What do all life forms need in order to grow and reproduce?

All life forms need a source of energy. Signup and view all the answers

What is the acronym for the Last Universal Common Ancestor?

Luca Signup and view all the answers

When is Luca estimated to have lived?

four billion years ago Signup and view all the answers

What are the three great domains of life?

bacteria, archaea, and eukaryotes Signup and view all the answers

Which two domains are believed to be the two earliest?

bacteria and archaea Signup and view all the answers

What do eukaryotes include?

all plants and animals Signup and view all the answers

The Origins of Life

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Questions and Answers

Which of the following is a necessary compound for life on Earth?

What is the role of water in the development of life on Earth?

What were the conditions like on the young planet Earth when the first life forms emerged?

What is the source of energy for all life forms?

What are autotrophs?

What are the basic necessities for any life form?

What is the role of water in the development of life on Earth?

What gave rise to every species that has inhabited Earth?

What were the conditions like on the young planet Earth when the first life forms emerged?

What do all life forms need in order to grow and reproduce?

What is the acronym for the Last Universal Common Ancestor?

When is Luca estimated to have lived?

What are the three great domains of life?

Which two domains are believed to be the two earliest?

What do eukaryotes include?

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