Which of these is the 1st stage of fossil formation.

An organism dies its body is covered with a layer of sediment

Which of these statements describes mold, cast, or carbon film fossil formations?

The organism completely decomposes leaving behind an imprint

The fossil record shows "the history of life in the geologic past." Which statement is true?

The sequence of species, transitional fossils fill in gaps

Which of these is the 2nd stage of fossil formation?

Time passes and sediment layers continue to build up on the organism

Homologous structures are...

Body parts that are similar in structure but are different in function

Which of these is the 3rd stage of fossil formation?

Minerals seep into the organisms body and replace it with stone

What are vestigial structures?

Body parts that have lost their original function through evolution

Jon finds rock that has foot prints pressed into it. Which of these statements is correct about Jon's find?

It is a fossil, foot prints imbedded in rock are trace fossils.

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Unit 5 ?

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Questions 25

Answers

1
Which of the following is an example of a vestigial structure?
human forearm
belly button
whale pelvic bone
bat wing
2
Which of these is the 1^st stage of fossil formation.
Time passes and sediments continue to build up on the organism
The organism completely decomposes leaving behind an imprint
Minerals seep into the organisms body and replace it with stone
An organism dies its body is covered with a layer of sediment
3
Which of these statements describes mold, cast, or carbon film fossil formations?
The organism dies and its body is covered with a layer of sediment
Minerals seep into the organisms body and replace it with stone
The organism completely decomposes leaving behind an imprint
Time passes and sediment layers continued to build up on the organism
4
The fossil record shows "the history of life in the geologic past." Which statement is true?
The sequence of species, transitional fossils fill in gaps
A complete record of the order in which life appeared on Earth
Fossil from older layers have similar molecular structure to modern life
Fossils are often found in sedimentary layers of the earths crust
5
Which of these is the 2^nd stage of fossil formation?
Minerals seep into the organisms body and replace it with stone
An organism dies and its body is covered with a layer of sediment
Time passes and sediment layers continue to build up on the organism
The organism completely decomposes leaving behind an imprint
6
Gene mutations are the source of Variations upon which Natural Selection Acts
True
False
7
Homologous structures are...
Body parts that are similar in structure but are different in function
Body parts that are similar in function and structure
Body parts that are similar in function but are different in structure
Show relation to organism that lived in the past
8
Which of these is the 3^rd stage of fossil formation?
Time passes and sediment layers continue to build up on the organism
Time passes and sediment layers continue to build up on the organism
The organism dies and its body is covered with a layer of sediment
Minerals seep into the organisms body and replace it with stone
9
What is the importance of studying the development of embryos?
To monitor their growth.
To look for birth defects.
A similar habitat is required.
Check for common ancestry.
10
The following picture is an example of homologous structure.
False
True
11
Further ________ discoveries will help scientists study more details about the origin of new species.
species
fossil
human
animal
12
All vertebrate embryos exhibit _____________________ at a certain stage of development.
Gills
Pharyngeal pouches
Vestigial pouches
Tails
13
The _________ ___________ is made up of fossils that have been discovered around the world.
sedimentary layer
geological record
fossil record
index fossil
14
Homologous structures in organisms suggest that the organisms
have a skeletal structure
must have lived at different times
are now extinct
have a common ancestor
15
What are vestigial structures?
structures that look the same
Body parts that have lost their original function through evolution
structures with the same function but different structure
Structures with a similar structure but different function
16
Choose the best example of analogous structure
leg of a dog and leg of a wolf
Octopus eyes
ostrich wings
butterfly wing and bird wing
17
Body parts that have lost their original function through evolution.
Vestigial Structures
Analogous Structures
Building Structures
Homologous Structures
18
Body parts that perform a similar function but differ in structure are called...
Homologous Structures
Comparative Anatomy
Analagous Structures
Vestigial Structures
19
According to scientists the oldest evidence of life on earth is
1.5 billion years ago
2.5 billion years ago
860 million years ago
3.5 billion years ago
20
Scientists study similarities and differences among structures of living species in
Comparative Biochemistry
Comparative Anatomy
Molecular Biology
Embryology
21
Which of these conditions is least likely to cause a species to become extinct due to environmental changes?
More competition for food
More genetic variation
Less genetic variation
Specific food preferences
22
science of the development of embryos from fertilization to birth
developmental biology
vestigial structures
embryology
comparative anatomy
23
The degree to which species are related depends on how closely in _______ they diverged from their common ancestor.
Environment
Adaptations
Time
Anatomy
24
Species that are closely related share a close
common parent
common ancestor
common opinion
common structure
25
Jon finds rock that has foot prints pressed into it. Which of these statements is correct about Jon's find?
It is a fossil, foot prints imbedded in rock are trace fossils.
It is a fossil only if actual parts of the organism are in the rocks nearby
It is not a fossil because foot prints are not fossils
It is not a fossil because only whole organisms are fossils

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