PENN FOSTER BIOLOGY TEST 1
QUESTIONS AND ANSWERS PASS
GUARANTEED 100%
_______ are the smallest units of life. - Answer ✅Cells
Which one of the following lists shows the correct order of biological organization? - Answer
✅Population, community, ecosystem, biosphere
A modification that makes organisms more suited to their environment is called a/an - Answer
✅adaptation.
The life-domain whose members live in very harsh environments, such as salt lakes and hot
springs, is called - Answer ✅Archaea.
During a scientific experiment, the control group is - Answer ✅identical to the experimental
group in all areas except the variable being tested.
The subatomic particle that carries a positive electrical charge is the - Answer ✅proton.
When an atom has two or more outer electron shells, the outer shell will be most stable if it
contains eight electrons. This concept is called the - Answer ✅octet rule.
When two oxygen atoms join together, a _______ is formed. - Answer ✅molecule
@2025 Exam Material 1
, The type of bond in which atoms share electrons to produce a completed outer shell is
a/an _______ bond. - Answer ✅covalent
The polarity of water molecules causes them to be attracted to one another in what's called
a _______ bond. - Answer ✅hydrogen
As the number of hydrogen ions in a solution increases, the pH of the solution - Answer
✅decreases.
During winter only the upper surface of a lake freezes, which allows for life to persist below
the surface. Which of water's unique properties is responsible? - Answer ✅Lower density as ice
The most abundant element by weight in the human body is - Answer ✅oxygen
Among living things, the most common polysaccharide structural carbohydrate is - Answer
✅cellulose
Which one of the following functional groups is associated with fatty acids? - Answer ✅Carboxyl
The hard body parts of insects and crabs are composed of a polysaccharide called - Answer
✅chitin.
Cell membranes are composed mainly of which type of lipids? - Answer ✅Phospholipids
@2025 Exam Material 2
QUESTIONS AND ANSWERS PASS
GUARANTEED 100%
_______ are the smallest units of life. - Answer ✅Cells
Which one of the following lists shows the correct order of biological organization? - Answer
✅Population, community, ecosystem, biosphere
A modification that makes organisms more suited to their environment is called a/an - Answer
✅adaptation.
The life-domain whose members live in very harsh environments, such as salt lakes and hot
springs, is called - Answer ✅Archaea.
During a scientific experiment, the control group is - Answer ✅identical to the experimental
group in all areas except the variable being tested.
The subatomic particle that carries a positive electrical charge is the - Answer ✅proton.
When an atom has two or more outer electron shells, the outer shell will be most stable if it
contains eight electrons. This concept is called the - Answer ✅octet rule.
When two oxygen atoms join together, a _______ is formed. - Answer ✅molecule
@2025 Exam Material 1
, The type of bond in which atoms share electrons to produce a completed outer shell is
a/an _______ bond. - Answer ✅covalent
The polarity of water molecules causes them to be attracted to one another in what's called
a _______ bond. - Answer ✅hydrogen
As the number of hydrogen ions in a solution increases, the pH of the solution - Answer
✅decreases.
During winter only the upper surface of a lake freezes, which allows for life to persist below
the surface. Which of water's unique properties is responsible? - Answer ✅Lower density as ice
The most abundant element by weight in the human body is - Answer ✅oxygen
Among living things, the most common polysaccharide structural carbohydrate is - Answer
✅cellulose
Which one of the following functional groups is associated with fatty acids? - Answer ✅Carboxyl
The hard body parts of insects and crabs are composed of a polysaccharide called - Answer
✅chitin.
Cell membranes are composed mainly of which type of lipids? - Answer ✅Phospholipids
@2025 Exam Material 2
