WGU C190 INTRODUCTION TO BIOLOGY EXAM
QUESTIONS AND ANSWERS LATEST UPDATE
A subatomic particle has a negative charge and is found in a shell of the atom. What is
the particle?
An electron
Male peacocks compete with one another to mate female peacocks. Males with more
colorful tail feathers attract female mates at a higher rate than those w/o. Therefore
male peacocks have colorful tail feathers, whereas female peacocks do not. What is this
an example of?
Sexual selection
A gardener maintains a species of rose that producd either yello flowers ( the dominant
phenotype) or white flowers ( the recessive phenotype). One day, the gardener
observes that a cross between two yellow rose bushes has led to a single rose bush
with orange flowers. What evolutionary mechanism is involved in the change in the
gene pool of this species?
Mutation
Some cells need to maintain a set of cencentrations of na+ and k+ ions. These cells are
able to do this with the help of the na/k pump, which transports these ions from areas of
low concentration to areas of high concetration ( against their concentration gradient).
,Na+ is pumped out and k+ is pumped in. Which type of membrane transport is involved
in this action?
Active transport
Chromosomes are structures that contain hereditary mateiral that will be passed from
one generation to the next. According to this information, which organic molecule must
be present in chromosomes?
Dna
A cell has divided its chromosomes into wo new nuclei. The cytoskeleton of the cell is
currently pinching the cell in the middel to from two new cells. In which stage of the cell
cycle is this cell?
Cytokenesis
There are four species of woodpeckers that inhabit the pine forests in the southeastern
area of the u.s. Individuals of this species utilize many of the same resources for food
and nesting. Which level of ecological organization describes the relationship among
these four species of woodepecker?
Community
Two species of woodpecker inhabit the same loblolly pine woodland throughout the
southeastern u.s. Each species requires recently deceased (but still standing) pine trees
for reproduction . The woodpeckers excavate their nest cavities in the dead pine trees.
In most healthy forests there are generally not enough dead pine tress to provide nests
for all the woodpeckers that want to build them. What is the relationship between these
two species of woodpecker an example of?
Competition
, While abroad, a traveler drinks unclean water containing tapeworm cysts. The
tapeworm attaches to the intestical walls of the traveler, absorbing nutrients from the
partially digested food. Over the next few months, the traveler experiences ongoing
nausea, loss of appetite, and weight loss due to the presence of the tapeworm in his
intestines. What is the interaction between the tapeworm and the traveler and exmple
of?
Parasitism
What is the charge of a proton?
+1
A molecular bondd results from an electron being transferred from one atom to another.
Which type of bond holds these atoms together?
Ionic
Which situation describes covalent bonding?
An atom shares an electron with another atom.
Which item would be classified as biotic?
Fungus
Which item is an atom?
QUESTIONS AND ANSWERS LATEST UPDATE
A subatomic particle has a negative charge and is found in a shell of the atom. What is
the particle?
An electron
Male peacocks compete with one another to mate female peacocks. Males with more
colorful tail feathers attract female mates at a higher rate than those w/o. Therefore
male peacocks have colorful tail feathers, whereas female peacocks do not. What is this
an example of?
Sexual selection
A gardener maintains a species of rose that producd either yello flowers ( the dominant
phenotype) or white flowers ( the recessive phenotype). One day, the gardener
observes that a cross between two yellow rose bushes has led to a single rose bush
with orange flowers. What evolutionary mechanism is involved in the change in the
gene pool of this species?
Mutation
Some cells need to maintain a set of cencentrations of na+ and k+ ions. These cells are
able to do this with the help of the na/k pump, which transports these ions from areas of
low concentration to areas of high concetration ( against their concentration gradient).
,Na+ is pumped out and k+ is pumped in. Which type of membrane transport is involved
in this action?
Active transport
Chromosomes are structures that contain hereditary mateiral that will be passed from
one generation to the next. According to this information, which organic molecule must
be present in chromosomes?
Dna
A cell has divided its chromosomes into wo new nuclei. The cytoskeleton of the cell is
currently pinching the cell in the middel to from two new cells. In which stage of the cell
cycle is this cell?
Cytokenesis
There are four species of woodpeckers that inhabit the pine forests in the southeastern
area of the u.s. Individuals of this species utilize many of the same resources for food
and nesting. Which level of ecological organization describes the relationship among
these four species of woodepecker?
Community
Two species of woodpecker inhabit the same loblolly pine woodland throughout the
southeastern u.s. Each species requires recently deceased (but still standing) pine trees
for reproduction . The woodpeckers excavate their nest cavities in the dead pine trees.
In most healthy forests there are generally not enough dead pine tress to provide nests
for all the woodpeckers that want to build them. What is the relationship between these
two species of woodpecker an example of?
Competition
, While abroad, a traveler drinks unclean water containing tapeworm cysts. The
tapeworm attaches to the intestical walls of the traveler, absorbing nutrients from the
partially digested food. Over the next few months, the traveler experiences ongoing
nausea, loss of appetite, and weight loss due to the presence of the tapeworm in his
intestines. What is the interaction between the tapeworm and the traveler and exmple
of?
Parasitism
What is the charge of a proton?
+1
A molecular bondd results from an electron being transferred from one atom to another.
Which type of bond holds these atoms together?
Ionic
Which situation describes covalent bonding?
An atom shares an electron with another atom.
Which item would be classified as biotic?
Fungus
Which item is an atom?
