Ch 14 History Of Life

Question 1

Living things could also come from no living things

Answer 1

Spontaneous generation

Question 2

Total number of protons and neutrons in the nucleus

Answer 2

Mass number

Question 3

The nucleus releases particles or radiant energy or both until the nuclei becomes stable

Answer 3

Radioactive decay

Question 4

The length of time it takes for one half of any size sample of an isotope to decay to stable form

Answer 4

Half life

Question 5

Spherical in shape and are composed of many protein molecules that are organized as a membrane

Answer 5

Microspheres

Question 6

Collections of droplets that are composed of molecules of different types including lipids amino acids and sugars

Answer 6

Coacervates

Question 7

Group of unicellular organisms many of which thrive under extremely harsh environmental conditions

Answer 7

Archaea

Question 8

In this process CO2 serves as a carbon source for the assembly of organic molecules

Answer 8

Chemosynthesis

Question 9

A group of photosynthetic unicellular prokaryotes

Answer 9

Cyanobacteria

Question 10

All living things come from other living things

Answer 10

Biogenesis