The sequence of events that represent how life may have emerged is shown in _____?

mono,poly formed- protobiont emerge,metab & self-rep,RNA pro

Which of the following best describes two properties of water?

Takes energy to change the state of H2O; dissolves most comp

Which of the following best describes membranes?

mem are bi or single layer;reg mat move in/out of the in env

In the illustrationH2O cham exists directly over heatWhat does this repres &what is the process

Repr the prim sea;H2O vapor is produced which cont to atmos

Which of the following correctly identifies a role played by RNA in early life,

metabolization; ATP now functions primarily in this role

process of combining smaller parts to make a larger product

What are considered to be four conditions required for chemical evolution.

O absen-inorganic mol present-high energy -adequate time

Which of the choices below correctly shows the sequence of development leading to mammals?

fish - amphibians - reptiles - mammals

Why are water molecules considered to be a critical component of the emergence of life on earth

Chem reac.tween organic mol require an aqueous environment.

Organic monomers can be found within very old meteorites. Which statem best states this theory?

Organic monomers were brought to earth by meteorites

Why are Hydrogen and Helium unable to be found in their elemental form on earth?

They have low mass & high velo, they escaped earth’s atmos

What does hydrolysis refer to and how does it relate to the production of organic polymers?

split mol apart w/ H2O;syn mol rely on creat or recy of mol

Why is molecular biology such a critical portion of our studies?

mol bio provides evidence to support a single common ancest.

Development refers to:

an organism’s change through a life cycle

H2O is _. LiqH2O occurs because it forms _ bonds tween the _on one H2Omol and the _on another.

cohesive; hydrogen; hydrogen, oxygen

Why do we use specific properties of life to help us determi if something is considered living?

spec prop help to ID whet it is rep of a living org or not

Which example below best reflects the characteristic of homeostasis?

a single cell regulating what enters through the membrane

Deep time is a phrase that we use to illustrate the concept that

devof life has occurred over a long per of time & is acceler

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Origins of Life

39 termsStudBud Administration379 plays

For High School Biology Class studying the origins of life.

Flashcards39 cardsFPractice quizPHost liveL

Questions 39

Answers

1
The sequence of events that represent how life may have emerged is shown in _____?
proto emer,mono,poly formed, metab & self-rep dev,RNA prod
poly formed-mono formed - metabolism & self-rep-RNA produced
mono,poly formed- protobiont emerge,metab & self-rep,RNA pro
poly formed-mono formed-dev of RNA-metabolism & self-rep
2
Which of the following best describes two properties of water?
Takes the pres of solute for H2Omol to form Hbonds;is adhes.
Abs ofH2O for most chem reac to occur; Can change quickly.
Takes little en to change state of H2O; Mole form ionic bond
Takes energy to change the state of H2O; dissolves most comp
3
Which of the following best describes membranes?
mem are alw a bil; don'tallow any mat in/out of in env
mem are composed of NA's;play a major role in asexual repro
mem are alw sin layer; don't play role in reg in/out in envt
mem are bi or single layer;reg mat move in/out of the in env
4
We study the origin of life on Earth as a way to better understand
how life currently on Earth maychange as evolution continues
how we can distinguish living organi from non-living objects
all of the above
the molecular biology of life both prior and present
5
Cells are part of the characteristic of ”order”. They are considered the _________.
requirement for reproduction
smallest unit of molecules
building blocks of life
building blocks of animal life
6
Which characteristic refers to an organisms ability to metabolize?
Reproduction
Development
Order
Energy processing
7
Which of the following were present in the early atmosphere of earth?
I, II, III, VI
I, II, IV, VI
I, II, III, IV
I, II, III
8
Approximately how long did Earth exist before life formed?
1 billion years
4.6 billion years
3.6 billion years
2 million years
9
Why is it considered ironic that life emerged on Earth during a time of intense UV radiation?
UV radiation increases the chances for lightning
UV radiation damages cells
UV radiation allows cells to reproduce quickly
UV radiation prevents photosynthesis
10
Which characteristic refers to homeostasis?
Reproduction
Adaptation
Response to the environment
Regulation
11
Stanley Miller’s experiment was attempting to create conditions similar to those found ______
on early Earth
currently on Earth
inside of volcanoes on early Earth
inside of exploding stars
12
In the illustrationH2O cham exists directly over heatWhat does this repres &what is the process
Repr the atmos; inorg mol are heated- results in Amino acids
Repr volc act; where gases are cooled and liqH2O is produced
Repre source of O;released to the atmos to catalyzes react
Repr the prim sea;H2O vapor is produced which cont to atmos
13
Which of the following correctly identifies a role played by RNA in early life,
metabolization; ATP now functions primarily in this role
catalyzation; RNA continues to function primarily in role
replication; ATP now functions primarily in this role
metabolization; proteins now function primarily in this role
14
H2O mol form _ bonds w/other H2O mol.This type of bonding occurs tween_atoms & _atoms of H2Omol
oxygen; oxygen; hydrogen
hydrogen; hydrogen; oxygen
hydrogen; hydrogen; hydrogen
helium; helium; hydrogen
15
Synthesis is
the process of generating new cells
process of combining smaller parts to make a larger product
process of splitting apart things larger into smaller pieces
process of combining negatively charged particles together
16
Use the table provided below to answer questions 28-30: LUCA existed during the time period___
A
C
B
D
17
What are considered to be four conditions required for chemical evolution.
O absent-organic poly present-low UV radiation-adequate time
O present-inorganic mol-adequate time-Hydrogen & He in atmos
O present-organic polymers present-ozone present-adequ. time
O absen-inorganic mol present-high energy -adequate time
18
Which of the choices below correctly shows the sequence of development leading to mammals?
fish - eukaryotic cells - dinosaurs – mammals
dinosaurs - primates - mammals – humans
fish - amphibians - reptiles - mammals
reptiles - amphibians - fish – LUCA
19
Why are water molecules considered to be a critical component of the emergence of life on earth
Water provides the oxygen gas necessary for all life
All organic molecules are soluble in water.
organ mono consist of one H2O mol connected to a Cstruct
Chem reac.tween organic mol require an aqueous environment.
20
The 1st multicellular eukaryotic cells occurred approx _ years after the earth was formed.
2.6 million
3.6 billion
1.0 billion
2.6 billion
21
how many lifetimes ago did the mammoth become extinct?
13.9 human lifetimes
72,000 human lifetimes
139 human lifetimes
720,000 human lifetimes
22
Primitive Cells became morecomplex producing RNA, DNA & enzymes. So primitive cells led to
Micelles
Liposomes
plant cells
LUCA
23
Identify the process shown in the illustration below
hydrolysis
decomposition
dehydration synthesis
combustion
24
Organic monomers can be found within very old meteorites. Which statem best states this theory?
Organic monomers were brought to earth by comets
Orga mono originated within stars that exploded long ago
Organic monomers were brought to earth by meteorites
Orga mono were brought to earth by alien plants and animals
25
Which statements are considered true statements about the elements listed on the periodic table
There is inverse relat tween the mass&velo of atoms of a gas
All atoms found on Earth, were once found within stars
a. Both B & C
Atoms from all elem are light enough to escape Earth’s atmos
26
Why are Hydrogen and Helium unable to be found in their elemental form on earth?
They have low mass & low velo, so they escaped earth’s atmos
They have low mass & high velo, they escaped earth’s atmos
They have high mass & low velo, they escaped earth’s atmos.
They have high mass & high velo, they escaped earth’s atmos
27
What does hydrolysis refer to and how does it relate to the production of organic polymers?
splitting mol apart with H2O;mol DNA is form from larg mol.
comb mol w/ a loss of H2O; small mol are crea from larg mol.
split mol apart w/ H2O;syn mol rely on creat or recy of mol
comb mol w/ loss of H2O; it is how large mol-DNA are created
28
Approximately how long after the first vertebrates evolved, did Homo sapiens develop?
470 my
380 my
479.9 my
479 my
29
Why is molecular biology such a critical portion of our studies?
Mol bio is a newer study of bio & is interest to scientists.
mol bio provides evidence to support a single common ancest.
Mol bio is the chem basis unique to each life form on Earth.
Molecular biology is focused on how life emerged on Earth.
30
One end of a phospholipid mole forms H bonds with H2O. We describe this end of the molecule as
polar hydrophilic end
polar hydrophobic end
non-polar hydrophilic end
non-polar hydrophobic end
31
Development refers to:
an organism’s change through a life cycle
an organism’s change from asexual to sexual reproduction.
an organism’s increase in size
an organism’s ability to adapt quickly
32
Others have developed exper expanding on SM's work.In recent exper which mol have been produced
Proteins
Cells
Sugars
All of the above
33
Where did the heavier elements, present in our solar system, come from?
the explosions of early stars
collisions between the earth and stars
the implosions of old stars
they were produced on earth from precursor molecules
34
H2O is _. LiqH2O occurs because it forms _ bonds tween the _on one H2Omol and the _on another.
cohesive; hydrogen; hydrogen, hydrogen
cohesive; hydrogen; hydrogen, oxygen
adhesive; hydrogen, hydrogen, hydrogen
adhesive; nitrogen, hydrogen, nitrogen
35
Why do we use specific properties of life to help us determi if something is considered living?
we don’t need prop, we can tell by look &feel if it is alive
prop change ifare investig plants/animals, don'tshare prop.
O may be dead;list of prop help decide if indiv org is alive
spec prop help to ID whet it is rep of a living org or not
36
Which example below best reflects the characteristic of homeostasis?
a person moving their hand quickly away from a fire source
a single cell regulating what enters through the membrane
a snake swallowing a mouse
a plant growing to fill a container
37
What are the reactants in a dehydration synthesis reaction?
Two polymers
A polymer and a water molecule
Two monomers
A monomer and a water molecule
38
Deep time is a phrase that we use to illustrate the concept that
devof life has occurred over a long per of time & is acceler
humans have been on E for long time relative to E’s history
required a short per of time for life on E to dev into diver
dev of life has occurred over a long per of time & is decele
39
Which characteristic of life does fire lack?
Order
Response to the environment
Reproduction
Energy processing

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