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8th Grade Science Review

Total questions: 12

Worksheet time: 7mins

Name
Class
Date
1.

Is an animal that has a alike function but different structure?

a)

Homologous

b)

Analogous

2.

What animal did Darwin study?

a)

A Finch

b)

A Lizard

c)

A Ladybug

d)

A Bear

3.

What is Natural Selection?

a)

The process were only plants better adapted to their environment tend to survive and produce more offspring.

b)

The process were only humans better adapted to their environment tend to survive and produce more offspring.

c)

The process were individuals better adapted to their environment tend to survive and produce more offspring.

d)

The process were organisms better adapted to their environment tend to survive and produce more offspring.

4.
What is the cause for all variation within a population?
a)
Natural Selection
b)
Adaptation
c)
Mutation
d)
Environmental Changes
5.
Because of an environmental change, organisms develop mutations to survive in that environment.
a)
True
b)
False
6.
In terms of evolution, survival is the most important thing.
a)
True
b)
False
7.
When has speciation occurred?
a)
When populations no longer look the same
b)
When populations no longer have the same frequency of alleles
c)
When populations are living in different environments
d)
When populations can no longer interbreed
8.

Which type of structures show that two organisms are closely related: homologous or analogous ?

a)

Homologous

b)

Analogous

9.
What is a protein: 
a)
A polymer composed of many sugars.
b)
A polymer composed of many amino acids. 
c)
A polymer composed of fatty acids. 
d)
A polymer composed of nucleotides. 
10.

Nucleotides are:

a)

monomers of proteins

b)

polymers of DNA

c)

DNA base pairs

d)

monomers of DNA

11.
The organic compounds that have many structural purposes and are used in many processes within the
cell are called ____________________.
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
12.

How does genetic variation of traits in populations increase some individuals’ probability of surviving and reproducing in a specific environment?

a)

They have different genes

b)

They have alike genes

c)

Natural Selection

d)

Mutation