Chapter 1 requirements for life

Question 1

Panspermia

Answer 1

that suggests that life on Earth may have had an extraterrestrial origin or at least contains ingredients that may have arrived from elsewhere during the early formation of the Earth.

Question 2

habitable zone (or Goldilocks zone)

Answer 2

where temperatures are reasonable and where water can exist in a liquid state given the pressure of the planet’s atmosphere, the probabilities are promising.

Question 3

life probably evolved in the ocean

Answer 3

Many biologists believe that

Question 4

extremophiles

Answer 4

The organisms that inhabit these places are called extremophiles and we will discuss them again.

Question 5

Every living thing on Earth has at least the following major components for biochemical functioning:

Answer 5

Carbon
Hydrogen
Oxygen
Nitrogen
Phosphorous
Sulfur

Question 6

Chitin

Answer 6

Other organisms like crustaceans manufacture tough polymers of chitin (calcium carbonate) that are as strong as KevlarTM.