Answer:
When the virus infects a cell, the RNA genome enters the cell and programs it to make new virus particles. These virus particles are released from the cell and go on to infect new cells. In humans, poliovirus is ingested, and replicates in cells of the gastrointestinal tract.Poliovirus, the prototypical picornavirus and causative agent of poliomyelitis, is a nonenveloped virus with a single-stranded RNA genome of positive polarity. The virion consists of an icosahedral protein shell, composed of four capsid proteins (VP1, VP2, VP3, and VP4), which encapsidates the RNA genome (1).RNA viruses generally have very high mutation rates compared to DNA viruses, because viral RNA polymerases lack the proofreading ability of DNA polymerases. The genetic diversity of RNA viruses is one reason why it is difficult to make effective vaccines against them.
Parasites only affect species that are prone or unclean.
True
False
In mouse, genes X, Y and Z are on chromosome 2. The map of genes X, Y and Z is:
X--------20mu--------Y---------------30mu---------Z.
You cross an individual with genotype XXYYZZ to an individual with genotype xxyyzz, and F1 progeny are collected. Assume interference between regions (X-Y and Y-Z) is 40%. You then perform a cross between an F1 individual and an individual with genotype xYz/xyz. Among 1000 progeny, how many of them will be of the genotype xxyyzz?
Answer:
36 individuals xxyyzz
Explanation:
Available data:
X-Y = 20MUY-Z = 30MUCross: XXYYZZ x xyyzzF1= XxYyZzI = 40%2nd Cross: XxYyZz x xxYyzzF2 = 1000 individualsWe need to know how many individuals from the F2 are going to be xxyyzz
xxyyzz genotype is the result of a double recombinant event.
First, we need to analyze the given information:
→ Distances between genes
The genetic distance result from multiplying the recombination frequency of each region by 100 and expressing it in map units (MU). So, if we have the genetic distance we can divide it by 100 and get the recombination frequency:
Let us say that region I is the distance between X and Y. And region II is the distance between Y and Z.
GD = genetic distance
RF = Recombination frequency
GD (X-Y) = RF x 10020MU = RF x 100
20MU/100 = RF
0.2 = RF (Region I)
GD (Y-Z) = RF x 10030MU = RF x 100
30MU/100 = RF
0.3 = RF (Region II)
Now we have the recombination frequency of Region I and Region II.
→ Interference
Knowing the interference value will let us know the value of the coefficient of coincidence, which will also lead us to the number of individuals xxyyzz.
I = 40%
I = 1 - CC ⇒ CC = coefficient of coincidence
Clearing this equation gives us the value of CC
CC = 1 - I
CC = 1 - 40% = 1 - 0.4
CC = 0.6
To calculate the coefficient of coincidence, CC, we can also use the next formula:
CC = observed double recombinant frequency/expected double recombinant frequency
Now, we are interested in knowing the value of the observed double recombinant frequency.
Note:
observed double recombinant frequency = total number of observed double recombinant individuals/total number of individuals expected double recombinant frequency = recombination frequency in region I x recombination frequency in region II.So, to get the value of the observed double recombinant frequency, first, we need to get the value of the expected double recombinant frequency. And we can do it because we already have the recombination frequencies in both regions.
expected double recombinant frequency = recombination frequency in region I x recombination frequency in region II
- Recombination Frequency - RI = 0.2
- Recombination Frequency - RII = 0.3
expected double recombinant frequency = 0.2 x 0.3
expected double recombinant frequency = 0.06 = EDRF
Now that we know the value of the CC and the expected DRF, we can get the observed double recombinant frequency.
CC = observed double recombinant frequency/expected double recombinant frequency
- CC = 0.6
- EDRF = 0.06
CC x expected double recombinant frequency = observed double recombinant frequency
0.6 x 0.06 = observed double recombinant frequency
0.036 = observed double recombinant frequency = ODRF
Finally, as this is a frequency, we need to multiply it by the total number of individuals in the F2 to get the number of observed double recombinant individuals.
- ODRF = 0.036
- N = 1000
Double recombinant individuals = 0.036 x 1000 = 36 individuals xxyyzz.
what are the tropical rainforest dominant animals(biotic)
Answer:
The most dominant animal species found in a tropical rainforest are mammals and birds that have adapted to a life in the trees. In a tropical rainforests you can see anything from a chimpanzee to a jambu fruit dove.
Explanation:
If a company genetically modifies corn to produce an odor that repels insects, which best describes how the corn was modified?
Answer:
★ The corn was modified by water
Explanation:
Hope you have a great day :)
True or False. Only animals have adaptations that better allow them to survive and reproduce, flowers do not.
Answer:
false
Explanation:
why do you need to take biology in college if your major is Nursing?
Answer:
Because you still have to obtain degree in your nursing
how energy transformations involved in photosynthesis are related to energy transformation involved in cellular respiration
Answer:
Photosynthesis is the process by which energy is converted to chemical energy in plant cells. In cellular respiration plants use the chemical energy stored during photosynthesis in basic life processes. During both photosynthesis and cellular respiration, energy is converted.
Explanation:
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what are all the zodiac names
if I was born in september what is my zodiac
I WILL GIVE 20 POINTS FOR THIS
Answer:
Virgo
Explanation:
Have a great day :)
Answer:
libra, cancer, aries, scorpio, leo, pisces, saggitarius, aqurious, capicorn, tarous, and gemini
Explanation:
Virgo
The zodiac sign for September is Virgo.
This zodiac symbol is considered to influence those born August 23 - September 22, under the Virgo zodiac sign
This is a gastropod fossil from Triassic period. This type of fossil can be on the east boundary of the state of Missouri. It looks a lot like ______ we find on Earth today.
A) ferns
B) fish
C) snails
D) starfish
Answer:
C . snails
Explanation:
This shell looks like a snail shell
In which domain Nd kingdom does it belong in?
Reread the first and second paragraphs. Number the events below in order from first to last.
___ Local business owners and movie studios began working together to bring films to local theaters.
___ Early movie theaters started opening in the early 1900s.
___ The first movies were made in the late 1800s.
A student places water in a freezer. Several hours later, the student observes that the water has frozen.
Which statement BEST describes the arrangement and motion of particles in the ice?
The particles have high energy and move about freely.
The particles have low energy and vibrate in a fixed position.
The particles have high energy, are charged and move about freely.
The particles have low energy and are able to move past each other.
Answer:
the particles have low energy and are able to mive and past each other
The particle in the ice will have low energy and vibrate in a fixed position. The correct option is B.
What is freezing?The process by which something changes from liquid to solid as the temperature drops is known as freezing. Water basically freezes at 0 degrees Celsius.
The process of changing a substance from a liquid to a solid is known as freezing. When a liquid's molecules slow down enough, their attractions cause them to arrange themselves into fixed positions as a solid.
The average energy of the molecules in a liquid decreases as it cools. At some point, the amount of heat removed is great enough that the molecules' attractive forces draw them close together, and the liquid freezes to a solid.
The particles in a liquid eventually stop moving and settle into a stable arrangement, forming a solid.
Thus, the correct option is B.
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B. How do the roots of the trees may help in controlling soil erosion?
a.They keep the soil more intact
b. They go deep down the ground.
c. They absorb nutrients from the soil
d. All of the above
I believe the answer is d, all of the above ^^
PLS HELP IM TIMED
Which human activity causes an immediate increase in the amount of greenhouse gases in the atmosphere?
A.
biological magnification
B.
burning fossil fuels
C.
deforestation
Answer:
b
Explanation:
On Earth, human activities are changing the natural greenhouse. Over the last century the burning of fossil fuels like coal and oil has increased the concentration of atmospheric carbon dioxide (CO2). This happens because the coal or oil burning process combines carbon with oxygen in the air to make CO2.
Which sustainable building practice does the photograph show?
A. Replacing wilderness with buildings to reduce the absorption of
carbon dioxide
B. Reusing old bottles and cans as insulating building materials
C. Using high-density housing to conserve resources
D. Reducing fossil fuel consumption and its associated pollution
SUBMIT
Answer:
The answer is C
Explanation:
Just did it
The sustainable building practice does the photograph show is to using high-density housing to conserve resources. Therefore, option (C) is correct.
The act of caring for these resources so that all living things can benefit from them now and in the future is known as conservation. Natural resources are the source of everything we require for survival, including food, water, air, and shelter.
Recycling the resource allows us to conserve it. For instance, many items can be recycled and repurposed into new ones. Recyclable materials include paper, plastic, glass, metal, and even electronic goods.
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The diagram below shows a stack of rock layers. These layers have not changed position since they formed. Examine the diagram and answer the question that follows. If the age of Layer 4 is 400 million years and the age of Layer 1 is 500 million years, then the age of Layer 3 is A. older than 500 million years. B. between 400 million and 500 million years. C. 500 million years. D. younger than 400 million years.
The age of layer 3 will be between 400 million and 500 million years. Therefore, option (B) is correct.
Why rock dating is important?Finding estimates of the ages of rocks is essential for identifying the speeds of geological processes as well as the history of geological occurrences. Some rocks may be used to determine the relative sequence of events. The most well-known methods are uranium-lead dating, potassium-argon dating, and radiocarbon dating.
Radiometric dating, which considers the ratio of two distinct isotopes in a sample, establishes the age of rocks. Geologists may use tools like these to assess the age of a material since radioactive isotopes degrade over a predictable period of time. mass spectrometer for thermal ionisation
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How many total carbonate ions would be present in the formula for aluminum carbonate?
Select one:
a.
3
b.
2
c.
1
d.
4
Answer:
its d
Explanation:
okra seed contains reserve food which is stored in...
A. seed coat
B. seed leaves
C. embryo
D. seed scar
Answer: For my knowledge of most plants, I'm pretty sure it's C., embryo.
Explanation: . . .
Which of the following describes a portion of the water cycle that is not driven by
gravity? O
(1 Point)
B) Precipitation of water that has condensed from clouds
D)Water seeping into the ground to enter an aquifer
C)Water flowing in a river toward the ocean
A) Evaporation of water from the ocean to form clouds
The correct answer is A. Evaporation of ocean water to form clouds.
Explanation
The water cycle is a series of physical-chemical phenomena in which water goes through three states (liquid, solid and gaseous). In this process, the water in a liquid state is evaporated becoming in a gaseous state, and rising towards the sky (against the force of gravity) forming clouds. Once in the clouds, the water condenses, going from a gaseous to a liquid state. After this process, the water precipitates by the action of gravity towards the earth where a process such as the filtration of water in the soil occurs, forming aquifers, the accumulation of water in the rivers that flow into the sea, the freezing of water on the snowy peaks of the mountains, among others. According to the previous explanation, the correct answer is A. Evaporation of ocean water to form clouds.
A person infected with the Ebola virus will experience symptoms within 2 to 21 days of being exposed to the virus. During this time, the virus uses cell machinery to make copies of itself. Ebola symptoms include fever, severe headaches, vomiting, and unexplained bleeding or bruising The reproductive cycle of the Ebola virus that most likely causes symptoms within 2 days is - A lysogenic because the onset of the symptoms is delayed Blytic because the individual experiences symptoms very quickly after infection C lysogenic because the onset of symptoms occurs in individuals over 60 years of age Dlytic because the virus affects the circulatory system
A red blood cell (RBC) enters the cranial vena cava of a dog and makes its way to the femoral artery of the dog. Choose the correct number corresponding to each component of the circulatory system that the RBC would encounter on its journey.
1. Lungs
Would not be included on this journey by the RBC
2. Right atrium
Would not be included on this journey by the RBC
3. Aorta
Would not be included on this journey by the RBC
4. Right ventricle
Would not be included on this journey by the RBC
5. Left atrium
Would not be included on this journey by the RBC
6. Carotid artery
Would not be included on this journey by the RBC
7. Pulmonary artery
Would not be included on this journey by the RBC
8. Left ventricle
Would not be included on this journey by the RBC
9. Pulmonary vein
Would not be included on this journey by the RBC
i. 3
ii. 1
iii. 6
iv. 2
v. 8
vi. 4
vii. 5
viii. 7
Answer:iii. 6
Explanation: the RBC will enter from the superior vena cava into the right atrium then enters the right ventricle. Then it goes into the lungs through pulmonary artery from lungs it enters the left atrium through pulmonary vein and then enters the left ventricles and from left ventricles it enters the aorta.
what ia arumen in ruminant animals
Answer:
Ruminants include cattle, sheep, goats, buffalo, deer, elk, giraffes and camels. These animals all have a digestive system that is uniquely different from our own. Instead of one compartment to the stomach they have four. Of the four compartments the rumen is the largest section and the main digestive centre
The rumen. The rumen (on the left side of the animal) is the largest stomach compartment and consists of several sacs. It can hold 25 gallons or more of material depending on the size of the cow. Because of its size, the rumen acts as a storage or holding vat for feed.
7. Which of the following determines how quickly nutrients are absorbed? *
A. The cell's attitude
B. The cell's ribosomes
C. The cell's surface area/volume ratio
D. The cell's DNA
A person who is interested in learning more about the fight or flight response may pursue a career in?
Answer:
A person who is interested in learning more about the "fight or flight" response may pursue a career in endocrinology
Explanation:
The initial ingredients of a reaction.
Answer:
Reactant
Explanation:
I don't really know how to explain since it's a definition question. Just know that reactants are to the left of the arrow in a reaction, while products are to the right. The products are the end result.
HELP PLEASE DO NOT GIVE ME A LINK
Answer:
Hi, threre the answer is photic zone is the answer
Explanation:
the uppermost layer of a body of water that receives sunlight, allowing phytoplankton to perform photosynthesis.
Which means it has and goes through sunlight.
Hope this helps :)
43. A client says they have a headache, what should the trainer do? A. Recommend they drink water, then stop the training session B. Give them Advil, then stop the training session C. Give them a prescription medication, then continue training session D. Give them Advil, then continue training session
Answer:
A .recommended they drink water then stop training session
Explanation:
Because the trainer can't just give out prescription medication. They don't know if the person has allergies and it can make the clients headache worse.
A. Recommend they drink water, then stop the training session
First thing first, drug abuse is not an option. Drug abuse includes self medication or taking drugs not prescribed by a medical practitioner. As a fitness trainer, ones job is not to prescribe drugs.
According to this question, if a client is experiencing headaches during a training session, the best alternative for the trainer is to recommend taking water to calm the client down, then put an hold to the training. The trainer is not qualified to prescribe any drug whatsoever.
Therefore, the trainer should recommend that a client with headache drink water, then stop the training session.
In which of the following areas is the high biodiversity found there threatened? (Choose all that apply)
a. Columbia
b. Indonesia
c. Madagascar
d. India
Answer:
columbia, indonesia, and madagascar
Explanation:
i took the test
Among these alternatives, the country with high biodiversity found threatened is in Madagascar.
Threatened biodiversity in Madagacar70% of the species that inhabit these islands are totally unique in the world. Its great wealth of biodiversity ranges from
LemursMongoosesChameleonsBatsFoxes…In addition, during the last decade,
40 mammals69 amphibians61 reptiles42 invertebrates and 385 new plants have been discovered in its territory.Even so, 75% of its forests have disappeared in recent decades; therefore, urgent measures must be taken to prevent this phenomenon.
With this information, we can conclude thatthe country with high biodiversity found threatened is in Madagascar.
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What is a biodiversity hotspot?
a. a region with a stable number of native species threatened by human impacts
b. a region with a high number of native species threatened by human impacts
c. a region with very few native species threatened by human impacts
d. a region with native species decreasing for an unknown reason
Answer:
My answer is B.
Explanation:
A biodiversity hotspot is a region with a high amount of biodiversity that experiences habitat loss by human activity.
The biodiversity hotspot is "a region with a high number of native species threatened by human impacts".
What is biodiversity?Biodiversity would be the range of organisms that make up ecosystems on Earth, including plants, animals, including microorganisms.
What is level of biodiversity?There are 4 level of biodiversity:
Species Diversity.Genetic Diversity. Ecosystem DiversityFunctional Diversity.Therefore, the correct option will be (c)
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From this diagram of fossils (sorry it’s a bit blurry) which layer is the youngest and which layer is the oldest? How do you know?
Answer:
The bottom layer is the oldest, and the top layer is the youngest
Explanation:
As time goes on more and more sediment gets piled onto a certain place, meaning the oldest fossils will keep getting deeper and deeper