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Flashcards in Chapter 14 Deck (46)
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1

the belief that living things could come from non-living things

spontaneous generation

2

prior to the ___ century spontaneous generation was believed

17

3

who attempted to discredit spontaneous generation

Francesco Redi

4

Redi was from ___

italy

5

Redi's experiment was to prove that maggots come from ___

flies

6

what italian scientist experimented with spontaneous generation of microorganisms

Lazzaro Spallanzani

7

Lazzaro experiment:
1. created ___ ___
2. boiled broth to kill ___
3. ___ some flasks and left other one ___

meat broth
microorganisms
capped open

8

Spallazani's opponents claimed he ___ the samples

overheated

9

Spallazani's opponents thought that with he destroyed the ___ ___ when he 'overheated' the samples

vital forces

10

belief that living things come from living things

biogenesis

11

how long ago was the solar system a mass of swirling gas and dust

5 billion years ago

12

earth was a possible result of a ____

supernova

13

how old is Earth and the other planets

4.6 billion years old

14

how old are the first oceans

3.8 - 3.9 billion years old

15

to estimate the age of an object by measuring its content of radioactive isotopes

radiometric dating

16

unstable and 'decay' over time

radioactive isotopes

17

time it takes for a radioactive isotope to decay by one half

half-life

18

oldest evidence of life on earth is found in rock estimated to be ____ years old

3.5 billion

19

oldest evidence of life on earth is in the form of ___

fossils

20

first fossils were referred to as ___

microfossils

21

microfossils were fossils are fossils of

ancient prokaryote cells

22

what two scientists set up an experiment that was based on Oparin's Theory

Stanley Miller and Harold Urey

23

Lerman proposed that gases formed simple organic molecules so he proposed the ___ model

bubble

24

the bubble model:
- __ and __ were released from volcanoes into bubbles
- ___ rise to the surface and burst

ammonia methane
bubbles

25

formation of protein occurred either by amino acids spontaneously combining

formation of complex organic compounds

26

in the formation of complex organic compounds:
amino acids were heated in the absence of ___

oxygen

27

in the formation of complex organic compounds:
similar mechanisms may have led to the formation ___,__, and __

carbohydrates
lipids
nucleic acids

28

droplets of different types of irregulary shaped molecules

coacervates

29

coacervates include ___ and ___

amino acids
sugars

30

round, usually from one type of molecule

microspheres