Vestigial structures are

Various cells, tissues and organs which no longer serve a function

RNA WORLD hypothesis suggests

RNA was the first self-replicating molecule

any genetic change in an organism that may be helpful or not

Panspermia theory states

life did not originate on Earth

Analogous structures are

Different in structure yet similar in function.

Homologous structures are

formed in similarly in embryonic development different forms and functions

Artificial Selection is when

Humans pick traits in organisms that continue into the next generation

What is a limiting factor

Something that stops a population from growing.

The primordial soup theory says...

life began in a "soup" of organic molecules in Earth's early oceans.

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Unit 3 Earth Science Review

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Questions 23

Answers

1
What was the climate like during the Mesozoic era?
cold and humid
cold and dry
warm and humid
warm and dry
2
Vestigial structures are
Different in structure yet similar in function.
Different in function yet similar in structure
Various cells, tissues and organs which no longer serve a function
3
RNA WORLD hypothesis suggests
RNA was the first self-replicating molecule
DNA was the first self-replicating biomolecule
RNA was the first self-repeating biomolecule
DNA was the first self-replicating biomolecule
4
Which Era ended with the Dinosaurs going extinct?
analogous
rodinia
phanerozoic
mesozoic
5
Where does evidence point to that the meteor that marked the end of the Mesozoic Era impact the planet?
Austrian Alps
Yellowstone National Park
Yucatan Peninsula Mexico
Off the coast of West Africa
6
what is a mutation?
any change in the phenotype of a cell
any genetic change in an organism that may be helpful or not
any change that is harmful to an organism
any change that is helpful to an organism
7
What era did mammals appear but were not the dominant life form as reptiles were?
paleozoic
eoarchean
neoarchean
mesozoic
8
What best describes the word "Evolution"?
Change over time
Survival of the fittest
Genetic drift
Migration
9
Panspermia theory states
Aliens seeded life on Earth
life did not originate on Earth
Sperm is needed for life
Life originated on Earth and moved to other planets
10
Analogous structures are
Different in structure yet similar in function.
Different in function yet similar in structure
Various cells, tissues and organs which no longer serve a function
11
Homologous structures are
formed in similarly in embryonic development different forms and functions
formed in differently in embryonic development similar forms and functions
Various cells, tissues and organs which no longer serve a function
12
What Eon do we live in?
hadean
archean
phanerozoic
mesozoic
13
What era is considered the "Age of Mammals"?
cenozoic
hadean
paleoproterozoic
eoarchean
14
Where did most life live during the Paleozoic Era?
equally on oceans and land
in the jungle
In the oceans
on land
15
Artificial Selection is when
Humans pick traits in organisms that continue into the next generation
Nature "picks" traits that continue into the next generation
organisms have the same features with different functions
species change over time
16
About what percent of life on Earth went extinct with the dinosaurs?
70-80%
100%
85-100%
10%
17
What is a limiting factor
Something that stops a population from growing.
Something that helps a population grow
18
3. Where does the Hydrothermal Vent hypothesis suggest life started?
In the deep sea
In lowland grasslands
In freshwater springs
In high altitude mountains
19
In what Eon did Earth "Come of age"?
Phanerozic Eon
Archean Eon
Hadeon Eon
Proterozoic Eon
20
What Era do we live in?
paleozoic
cenozoic
mesoarchean
neoproterozoic
21
What supercontinent broke up during the Neoproterozoic Era?
Rodinia
Amazonia
North America
Pangea
22
What Era did the continents take up their present locations?
paleoproterozoic
cenozoic
eoarchean
hadean
23
The primordial soup theory says...
molecules always had lipid membranes
life began in a "soup" of organic molecules in Earth's early oceans.
molecules became living organisms in extremely cold places
that a bacteria from space is the first organism on Earth

Unit 3 Earth Science Review Flashcards | StudBud