CLEP BIOLOGY REA PRE-TEST QUESTIONS AND ANSWERS
Multiple sclerosis is a disease that destroys the myelin sheath around nerve bodies. - CORRECT
ANSWER✔✔nerve tissue loses its white color; nerve impulses are impaired; senses such as sight may be
adversely affected; control of muscle function may be lost
Abiotic limiting factors - CORRECT ANSWER✔✔density-independent factors
Abiotic limiting actors (such as pollution, drought, etc.) are also known as density-independent factors-
their effect on populations is independent of the population size.
Total area occupied by a particular species - CORRECT ANSWER✔✔Range
Populations have a particular geographic area with suitable conditions; this total area occupied by a
species is known as the range.
Permanent one-way movement out of the original range - CORRECT ANSWER✔✔Emigration
Is a permanent one-way movement of a species out of its original range into another.
Organisms with overlapping niches when resources are in short supply are in this state. - CORRECT
ANSWER✔✔Competition
2 or more different species that live within the same area and overlap niches are said to be in
competition if the resource they both require is in limited supply.
Maximum population level where a population will continue to thrive. - CORRECT ANSWER✔✔Carrying
capacity
Within a given area, the maximum level the population may reach where it will continue to thrive is
known as the carrying capacity.
somatic motor nerves - CORRECT ANSWER✔✔There are many types of nerves. Nerves that transmit
impulses from the central nervous system to skeletal muscle are called
Energy flows through the food chain from - CORRECT ANSWER✔✔producers to consumers to
decomposers
, Which group contains organisms with prokaryotic cells? - CORRECT ANSWER✔✔archaea
Temporary movement of a species from one range to another then back to the original is known as -
CORRECT ANSWER✔✔migration
Cyclooxygenase-2 (COX-2) is an enzyme vital to the production of the prostaglandins, but also
contributes to the inflammation of joints in medical conditions such as arthritis. New medications that
block the production of prostaglandins by COX-2 enzymes and thereby relieve the symptoms of arthritis
are a type of - CORRECT ANSWER✔✔Chemical inhibitor
Substances that compete to attach to an enzyme's active site are called inhibitors. If they attach to the
enzyme first, the cellular reaction will not take place. A hormones is a specific chemical messenger used
throughout the endocrine system.
What is the most likely outcome when the gene frequency within a given population remains constant? -
CORRECT ANSWER✔✔Evolution will not take place within this population.
Evolution of traits depends on the shifting of certain gene frequencies within a population. If gene
frequencies remain constant, evolution does not occur. It then follows that the rate of evolution within
the population will not increase. The expression of dominant or recessive traits will not be affected; it
will neither increase nor decrease.
Which group has members that ere not likely to have evolved earlier than members of any of the other
groups listed? - CORRECT ANSWER✔✔eubacteria
All of the following are members of the phylum Chordata - CORRECT ANSWER✔✔crocodile; trout;
platypus; whooping crane
A snail is found in the phylum? - CORRECT ANSWER✔✔mollusca
All of the following may inhibit enzymatic reactions - CORRECT ANSWER✔✔temperature; pH level;
particular chemical agents; lack of substrate
Multiple sclerosis is a disease that destroys the myelin sheath around nerve bodies. - CORRECT
ANSWER✔✔nerve tissue loses its white color; nerve impulses are impaired; senses such as sight may be
adversely affected; control of muscle function may be lost
Abiotic limiting factors - CORRECT ANSWER✔✔density-independent factors
Abiotic limiting actors (such as pollution, drought, etc.) are also known as density-independent factors-
their effect on populations is independent of the population size.
Total area occupied by a particular species - CORRECT ANSWER✔✔Range
Populations have a particular geographic area with suitable conditions; this total area occupied by a
species is known as the range.
Permanent one-way movement out of the original range - CORRECT ANSWER✔✔Emigration
Is a permanent one-way movement of a species out of its original range into another.
Organisms with overlapping niches when resources are in short supply are in this state. - CORRECT
ANSWER✔✔Competition
2 or more different species that live within the same area and overlap niches are said to be in
competition if the resource they both require is in limited supply.
Maximum population level where a population will continue to thrive. - CORRECT ANSWER✔✔Carrying
capacity
Within a given area, the maximum level the population may reach where it will continue to thrive is
known as the carrying capacity.
somatic motor nerves - CORRECT ANSWER✔✔There are many types of nerves. Nerves that transmit
impulses from the central nervous system to skeletal muscle are called
Energy flows through the food chain from - CORRECT ANSWER✔✔producers to consumers to
decomposers
, Which group contains organisms with prokaryotic cells? - CORRECT ANSWER✔✔archaea
Temporary movement of a species from one range to another then back to the original is known as -
CORRECT ANSWER✔✔migration
Cyclooxygenase-2 (COX-2) is an enzyme vital to the production of the prostaglandins, but also
contributes to the inflammation of joints in medical conditions such as arthritis. New medications that
block the production of prostaglandins by COX-2 enzymes and thereby relieve the symptoms of arthritis
are a type of - CORRECT ANSWER✔✔Chemical inhibitor
Substances that compete to attach to an enzyme's active site are called inhibitors. If they attach to the
enzyme first, the cellular reaction will not take place. A hormones is a specific chemical messenger used
throughout the endocrine system.
What is the most likely outcome when the gene frequency within a given population remains constant? -
CORRECT ANSWER✔✔Evolution will not take place within this population.
Evolution of traits depends on the shifting of certain gene frequencies within a population. If gene
frequencies remain constant, evolution does not occur. It then follows that the rate of evolution within
the population will not increase. The expression of dominant or recessive traits will not be affected; it
will neither increase nor decrease.
Which group has members that ere not likely to have evolved earlier than members of any of the other
groups listed? - CORRECT ANSWER✔✔eubacteria
All of the following are members of the phylum Chordata - CORRECT ANSWER✔✔crocodile; trout;
platypus; whooping crane
A snail is found in the phylum? - CORRECT ANSWER✔✔mollusca
All of the following may inhibit enzymatic reactions - CORRECT ANSWER✔✔temperature; pH level;
particular chemical agents; lack of substrate
