THEORIES ON THE ORIGIN OF LIFE

Question 1

Life may have been placed on earth by supernatural/divine forces.

Answer 1

SPECIAL CREATION

Question 2

Life may have been seeded by life-forms from another planet.

Answer 2

PANSPERMIA

Question 3

Life originated out in space and came to Earth inside a meteorite.

Answer 3

PANSPERMIA

Question 4

Evidences in panspermia:
Discovery of __ in remnants or artifacts:

Answer 4

organic molecules

Question 5

Life arise from non-living things

Answer 5

Spontaneous generation

Question 6

explain the seemingly sudden emergence of organisms such as rats, flies and maggots within rotting meat and other decomposable items

Answer 6

On the Generation of Animals

Question 7

one of the first to refute the idea that maggots (larvae of flies) spontaneously generate on meat out in open air

Answer 7

Francesco redi

Question 8

He believed that maggots developed from eggs laid by flies.

Answer 8

Francesco Redi

Question 9

all life comes from life

Answer 9

“Omne vivum ex vivo”

Question 10

Avid supporter of spontaneous generation theory.

Answer 10

John Needham (English Naturalist)

Question 11

Set out to demonstrate that microbes were the result of spontaneous generation.

Answer 11

John Needham (English Naturalist)

Question 12

His subsequent observation of life in the broth led to his conclusion that living things could arise from nonliving material.

Answer 12

John Needham (English Naturalist)

Question 13

Set out to demonstrate that microbes do not spontaneously generate.

Answer 13

Lazarro Spallanzani (Italian Biologist)

Question 14

Devised an experiment where he placed the broth in a flask, sealed the flask, and removed the air from the flask before boiling.

Answer 14

Lazarro Spallanzani (Italian Biologist)

Question 15

introduced the concept of biogenesis; living cells can arise only from preexisting living cells.

Answer 15

Rudolf Virchow (German scientist)

Question 16

Life arises only from pre-existing living things.

Answer 16

biogenesis

Question 17

disproved the theory of spontaneous generation with his famous swan-necked flask experiment.

Answer 17

Louis Pasteur (French Scientist)

Question 18

What Prize did Pasteur won from the Paris Academy of Sciences in 1862.

Answer 18

Alhumbert Prize

Question 19

Scientists believe that life arose on Earth from inanimate matter after Earth had cooled.

Answer 19

Origin from nonliving matter

Question 20

They started that random events probably produced stable molecules that could self-replicate.

Then, natural selection favored changes in the rate of reproduction, which eventually led to the first cell.

Answer 20

Origin from nonliving matter

Question 21

It had been theorized that life started in the oceans.

Answer 21

Primordial Soup

Question 22

The “primordial soup” idea came about when these two scientist each came up with the idea independently

Answer 22

Russian scientist Alexander Oparin and English geneticist John Haldane

Question 23

They combined the atmospheric gases in the amounts that early Earth’s atmosphere was thought to contain. They then simulated an ocean in a closed apparatus

Answer 23

Stanley Miller and Harold Urey

Question 24

This groundbreaking experiment seemed to prove that life on earth could have spontaneously formed fromnonorganic ingredients.

Answer 24

Miller-Urey Experiment