A subatomic particle has a negative charge and is found in a shell of the atom. What is the particle? - answer-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 p...
WGU- INTRO TO BIOLOGY QUESTIONS AND ANSWERS
A subatomic particle has a negative charge and is found in a shell of the atom. What is the particle? - answer-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? - answer-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? - answer-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? - answer-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? - answer-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? - answer-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? - answer-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? - answer-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? - answer-parasitism
What is the charge of a proton? - answer-+1
A molecular bondd results from an electron being transferred from one atom to another. Which type of bond holds
these atoms together? - answer-ionic
Which situation describes covalent bonding? - answer-an atom shares an electron with another atom.
Which item would be classified as biotic? - answer-fungus
Which item is an atom? - answer-nitrogen
, Largemouth bass have introduced into ponda that previoulsy did not contain any large, predatory fish. Which
adaptation would help the existing population of small, prey species of fish avoid predation from the large mouth
bass? - answer-faster than average swim speed
Which two activities assist in the movement of water through its cycle and take place in living things? - answer-
photosynthesis and aerobic respiration
Prarie ecosystems are common within continental interiors in the northern hemisphere. These ecosystems have a
thich nutrient rich top soil and are dominated by grasslands and shrubs. Which activity would have a negative impact
on biodiversity in a prarie ecosystem? - answer-collecting the rich topsoil to sell in surrounding cities
In the harsh artic tundra, the survivial of one species is often dependent on the actions of another. For example, the
artic bumblebee pollinates the artic poppy and receives energy nectar in return. Which interaction is occuring
between these species? - answer-mutualism
A remora ( suckerfish) eating food elft over by a shark is an example of which interaction between species? - answer-
commensalism
Which type of cell division results in sex cells? - answer-meiosis
Which characteristic describes both meiosis and mitotis? - answer-sister chromatids separate
What is a characteristic of dna, but not rna? - answer-it's directly copied to form proteins
Which pattern of inheritance is described when a phenotype results from the interaction of many genes? - answer-
polygenic inheritance
A dog breeder mates two black labrador retreivers dogs. The breeder is surprised by the offspring produced by this
crossing. In addition to offspring with beautiful black coats, there are dogs with brown, gray and tan coats. Which
form of inheritance is this an example of? - answer-polygenic
What is the function of hystones during the s phase? - answer-organizing and helping to unwind dna so the
replication enzymes can access it
How is dna structured during the metaphase stage of mitosis? - answer-the centromere at the center keeps dna lined
up at the cell's equator
What is true regarding transistion from metaphase to anaphase during mitosis? - answer-sister chromatids are
aligned along the center of the cell and then pull apart into separate chromatids.
Sister chromatids are being separated and moving towards opposite poles of the cell. What stage of mitosis is this? -
answer-anaphase
A cell undergoing meiosis is currently dividing. The two new daughter cells will be haploid, but the dna they contain is
still replicated. The homologous chromosomes have separated and are ready to start the second division, but they
have not yet begun the second round of division. Which stage of the cell cycle is this cell in? - answer-telophase i
Homologous pairs of chromosomes have separated into two cells. Sister chromatids in each cell have not yet lined
up in the middle of the cell. Which stage of the cell cycle is this? - answer-prophase ii
What is true of a eukaryotic cell? - answer-it contains mitochondrion
Choose the two substances that are the main components in the most eukaryotic cell membranes. - answer-lipids
and proteins.
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