Answer:
Acid , phenol or protein
Explanation:
The ratio of absorbance at 260 and 280nm is what is usually used to assess the purity which a DNA or RNA posses. A ratio of 1.8 is generally accepted as being pure for a DNA sample and a ratio of 2.0 is generally accepted also as being pure for RNA. when the ratio is significantly lower in each case, it indicates that there is presence of protein, phenol or other contaminants.
The zika virus was first identified in Uganda in 1947. The virus is transmitted from person to person by a bite from a mosquito. It is commonly carried by the Aedes mosquito which is prevalent throughout Central Africa. The virus has more recently spread to the Americas (South, Central, and now North) and is expected to spread to Europe. There is a concern that the virus may reach epidemic proportions. Zika virus is related to yellow and dengue fever. Common symptoms are low grade fever and a distinctive skin rash and other symptoms include vomiting, headache, and muscle and/or joint pain. Pregnant women should avoid traveling to areas known to have zika virus present because the virus is known to cause microcephaly and developmental difficulties related to the central nervous system. Based on the paragraph above, class discussions, and other VALID (be careful with your selection of e-materials! CDC – Center for Disease Control is a good place to start) sources of information please answer the following questions. State a reason why the virus has spread to the Americas and likely to spread to Europe. Define the term microcephaly. What bones of the fetal skull would be affected by zika? Specifically, what area of the CNS is not fully developed in microcephalic individuals. In 1 -3 sentences describe the developmental difficulties of microcephalic individuals. How does one know if they have contracted zika? Do men need to be concerned about contracting zika? How does one avoid contracting zika? In a short paragraph (2-5 sentences!) provide one example of a scientific measure that could possibly control the spread of zika and explain how the measure works (controls the spread).
Answer:
1.Most people infected with the Zika virus have no signs and symptoms, while others report mild fever, rash and muscle pain. Other signs and symptoms may include headache, red eyes (conjunctivitis) and a general feeling of discomfort. Zika virus is also called Zika or Zika virus disease. 2.The frontal and parietal bones, but not the occipital bone, collapse over the injured brain. Almost all of the children had prominent calcifications in the brain. Unlike in children infected with cytomegalovirus, periventricular calcifications are the exception in children infected with Zika virus. 3.No they should not be worried.
Explanation:
Describing Uses for Mercury
Visit this website and locate the element mercury, whose chemical symbol is Hg. Click on the square to read about the history, properties, and uses of mercury.
Name three uses for mercury.
Answer:
Mercury is used for making thermometers,advertising signs, and mercury switches.
Explanation:
hope this helps! :)
Answer:
thermometers, barometers, diffusion pumps, and other laboratory instruments
pesticides, dental preparations, batteries, and catalysts
Explanation:
What enzyme catalyzes the reaction in the Calvin cycle?
Answer:
ribulose bisphosphate carboxylase (RuBisCO)
Explanation:
The Calvin cycle is a process utilized to ensure carbon dioxide fixation. ... The carbon dioxide is combined with ribulose 1,5-bisphosphate to form two 3-phosphoglycerate molecules (3-PG). The enzyme that catalyzes this specific reaction is ribulose bisphosphate carboxylase (RuBisCO).
Answer:
ribulose bisphosphate carboxylase
What do some scientists today believe causes more adaptations' competition or environmental changes?
Answer:
According to an April study, table corals (Acropora hyacinthus) can adapt to resist bleaching in warmer waters. On Ofu Island in American Samoa, A. hyacinthus lives in both hot and cool pools. In the lab, researchers tested corals from both environments to see how they reacted to increased heat.
Explanation:
i dont really know i tried
Some scientists today believe that adaptations are more caused or provoked by the fact of competition.
What is meant by Adaptation?Adaptation may be defined as the process that significantly involves the modification of internal and external attributes of organisms that makes them fit for survival and reproduction in the natural environment.
Competition is because of the fact that as the diversity of organisms increases, the resource limits remarkably enable the organisms to activate the mechanism of competition. Due to this, each and every species makes itself superior in order to make their survival in the natural environment.
Therefore, some scientists today believe that adaptations are more caused or provoked by the fact of competition.
To learn more about Adaptations, refer to the link:
https://brainly.com/question/29594
#SPJ2
Describe what happens in your central nervous system when you prepare and eat breakfast. Start with objects in the environment and be specific.
Answer:
CNS controls eating by homeostatic mechanisms that interact with different cognitive control systems (e.g., memory, reward, attention, etc)
Explanation:
In the brain, eating control is modulated by different systems:
1- Homeostatic control: the hypothalamus plays a key role by controlling both the appetite and food intake
2- Attention: the parietal and visual parietal cortices are involved in sensory perception and integration
3- Emotion and memory: amygdala and hippocampus
4-Cognitive control: the prefrontal cortex (i.e., executive functions)
5-Reward: associated with the functioning of the striatum
In the first place, external signals such as, for example, neurotransmitters and hormones, are received by the hypothalamus that interacts with different systems (reward, emotion, memory) in order to achieve a homeostatic control of eating. Neuronal stimulation (for example, when we view foods), is achieved by the supply of oxygenated hemoglobin.
When a patient comes to a hospital with severe dehydration, doctors will give
them an IV filled with a salt-water solution called saline, which is isotonic with
the body's blood cells.
Why is the patient not given pure water?
Answer:
The red blood cells could burst.
Explanation:
If they are given pure water, the IV fluid will be hypotonic to the blood cells. That means water will end the red blood cells by osmosis, from a high concentration outside to a lower concentration inside.
This will result in the red blood cells becoming swollen and even potential bursting.
What happens at the Pacific Ring of Fire?
Answer:
THE PACIFIC RING OF FIRE Is an area around the pacific ocean with a lot of volcanic activity. magma is under the surface and lava is above the surface.
The Ring of Fire is home to 75% of the world's volcanoes and 90% of its earthquakes. This movement results in deep ocean trenches, volcanic eruptions, and earthquake epicenters along the boundaries where the plates meet, called fault lines.
so in conclusion in the pacific area there is basically a lot of volcanic activity
hope it helps
its all i could think of : )
Explanation:
Which means of particle transport is shown in Figure 7–4 below?
The figure shows the inside of a cell, the cell membrane, and the outside of the cell. Inside the cell, 15 spheres are labeled “high concentration.” Outside the cell, three spheres are labeled “low concentration.” A sphere enters a figure labeled “transport protein” that spans the cell membrane. An arrow shows that the sphere is moving from outside of the cell into the cell. A lightning bolt-shaped arrow is labeled “energy” and points to the transport protein.• A shaded hemisphere is shown at the top of the illustration titled 'Inside of Cell.' In the hemisphere are sixteen small spheres labeled 'High Concentration.'
• At the bottom of the illustration is the label 'Outside of Cell' on the unshaded part of the image. There are three small spheres labeled 'Low Concentration' in this area.
• A curvy horseshoe looking shape labeled 'Transport Protein' is shown entering the inside of the cell and has an upward arrow labeled on it.
• A small sphere is at the bottom of the curvy horseshoe shape with a jagged arrow next to it labeled 'Energy.'
A. diffusion
B. osmosis
C. facilitated diffusion
D. active transport
Answer:
The answer is D
Explanation:
Which is a common mistake to watch out for when taking a test?
reading test directions
rushing through the test
checking that answers are legible
showing all work
Answer:
Rushing through the tests B.
Explanation:
Answer:
The answer you are lookin for is B
Explanation:
There are three semicircular canals per ear.
True
O False
Qui
Identify the structure labeled C
A. Phosphate
B. Nucleotide
C. Base
D. Sugar
This diagram shows a plant cell. Which of these statements about plant cells must be true?
A)
A plant cell does not have a nucleus.
B)
Plant cells are all the same exact size and shape.
C)
A plant cell has many smaller vacuoles.
D)
A plant cell contains one large vacuole.
Answer:
I think the answer is a plant cell contains one large vacuole in its wrong because they have a nucleus I did not all plants have the same size or shape and they only have one large vacuole or sap vacoule hope it helps
Answer:
Its d
Explanation:
Plzz help!
Which best describes the relationship between two species and a niche?
If two species have the same niche, one species will always become extinct.
Two species are able to occupy the same niche in the same habitat.
Two species cannot occupy the same niche in the same habitat.
If two species have the same niche, one species will always move.
Answer:
C. Two species cannot occupy the same niche in the same habitat.
Explanation:
just took the quiz
Answer:
C
Explanation:
I did it on edge 2020
true or false all cells living or dead can produce new living cells
Answer:
TRUE!
Scientist use dead cell embryos to produce living cells
All cells living or dead cannot produce new living cells. Only the living cells can produce new cells. Therefore, the given statement is false.
What is Cell division?Cell division is the process by which a parent cell divides into two new daughter cells. Cell division usually occurs as a part of a larger cell cycle in which the living cell grows and replicates its chromosome before undergoing division.
Cell division occurs in living cells through mitosis and meiosis. The cell division occurs through karyokinesis and cytokinesis. Cell division is a part of the cell cycle. Cell cycle is divided into different phases such as G1 phase, S phase, G2 phase, and M phase.
Learn more about Cells here:
https://brainly.com/question/30046049
#SPJ6
Which of the following is a property of matter in the liquid
state?
Answer:
the answer is- the element
Explanation:
reason for my answer is because only two element are liquid at standard conditions for temperature and pressure: mercury and bromine.
Why are stem cells important to multicellular organisms?
Answer:The fabulous ability of an embryo to diversify and of certain adult tissues to regenerate throughout life is a direct result of stem cells, nature's gift to multicellular organisms.
Explanation:
what shoukd the patient expect to experience living with the disease- Sitius Inversus?? in ur own words
Answer:
there is a complete mirror image transposition of the thoracic (chest) and abdominal organs , and anterior-posterior (front-back) symmetry is normal. Many affected people have no associated health issues when the condition is isolated.
Explanation:
HELP will give brainlst and 20 points if ur correct
Explain how scientist measure geologic time.
Answer: Layered rocks and evolution of life and radiometric time scale based on radioactivity of chemical elements
Explanation:
Two scales are used to date these episodes and to measure the age of the Earth: a relative time scale, based on the sequence of layering of the rocks and the evolution of life, and the radiometric time scale, based on the natural radioactivity of chemical elements in some of the rocks.
I need a media article, about science, that seems like bs. More about sex or anything along those lines? I need to debunk it. But that article has to be based off an actual scientific experiment with a published paper. Does anyone have any articles?
Which of the following lists the levels of body organization from least complex to most complex?
Answer:The highest level of organization for living things is the biosphere; it encompasses all other levels. The biological levels of organization of living things arranged from the simplest to most complex are: organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere.
Explanation:
Define essential nutrient.
Answer:
Here:
Explanation:
They are nutrients that are not produced inside your body but your body needs it to survive. One example is Omega-3 fatty acid which is an essential fatty acid.
Answer:
Substance that must be obtained from the diet because the body cannot make it in sufficient quantity to meet its needs.
Explanation:
Hope this answers your question :)
How does the storage of energy in ATP molecules benefit a cell?
Answer:
ATP. Specifically, during cellular respiration, the energy stored in glucose is transferred to ATP (Figure below). ATP, or adenosine triphosphate, is chemical energy the cell can use. It is the molecule that provides energy for your cells to perform work, such as moving your muscles as you walk down the street.
Explanation:
Diagram 1 shows the tilt of Earth's axis. Diagram 2 shows how Earth would look if the tilt of the axis were increased. Each diagram shows the same two locations, Location X and Location Y. Sun Y X- um Earth Diagram 1 Sun •Y X- Swi Earth Diagram 2 Which statement BEST predicts the effect of increasing the tilt of Earth's axis in Diagram 2 on the two locations? Location Y will be cooler in winter and Location X will be cooler in summer. Location Y will be warmer in winter and Location X will be cooler in summer, Location Y will be cooler in winter and Location X will be warmer in summer. Location Y will be warmer in winter and Location X will be warmer in summer. PLEASE HELP MEEEEE
Answer:
confused
Explanation:
How could research on mice or rats help answer our medical research questions — questions that are, after all, about humans?
Answer:
you could disect them or observe what they do by doing things like putting them in a maze or seeing what they do in front of a mirror.
Explanation:
which kingdoms contain organisms that are multicellular You by bacteria archaea bacteria plant Amenia
Answer:
(B and (C
Animalia and Plantae
Explanation:
Got it right on edge (:
The kingdoms that contain organisms that are multicellular are Plantae, Animalia, and Fungi.
What are multicellular organisms?Multicellular organisms are living beings that comprise cells, they represent the prevailing form of life, on our planet encompass a range of organisms such, as plants, animals, fungi and certain protists.
The emergence of organisms has bestowed benefits compared to their unicellular counterparts. Notably their ability to achieve sizes and intricate complexities sets them apart.
Moreover multicellular organisms possess the capability to differentiate their cells for functions. This adaptability enables them to thrive in environments and enhances their edge in securing vital resources.
Learn about Fungi here https://brainly.com/question/1832482
#SPJ6
Which of the following is a function of nucleic acids?
a. Nucleic acids provide energy.
b. Nucleic acids store fatty acids.
c. Nucleic acids store and transmit genetic information.
d. Nucleic acids manufacture simple sugars,
Answer:
I belivie is C) Nucleic acids store and transmit genetic information
good luck ;)
In a given strand of dna the number of thymines
A. Is same as the number of uracils
B. Is double the number of guanines
C. Is double the number cytosines
D. Is the same as the number of adenines
Plz answer ASAP
Answer:
D. same number as adenines
Explanation:
As mentioned, adenines match with thymines and cytosines match with guanines, so there will always be the same quantity of guanine and cytosine and the same quantity of adenine and thymine.
Answer:
D
Explanation:
The number as adenines
what level of protein structure is found in most enzymes and hemogoblin
Tertiary level of protein structure is found in most enzymes and hemoglobin.
What are the functions of proteins?Proteins are large, complex molecules that play many critical roles in the body. They do most of the work in cells and are required for the structure, function, and regulation of the body's tissues and organs.
Protein has many roles in your body. It helps repair and build your body's tissues, allows metabolic reactions to take place and coordinates bodily functions. In addition to providing your body with a structural framework, proteins also maintain proper pH and fluid balance.
There are seven types of proteins: antibodies, contractile proteins, enzymes, hormonal proteins, structural proteins, storage proteins, and transport proteins.
Learn more about proteins:
https://brainly.com/question/29776206
#SPJ2
DNA libraries are useful for identifying and isolating eukaryotic DNA fragments of interest in research. Select the ways in which genomic and cDNA libraries differ.
a. Genomic libraries are difficult to express in prokaryotic cells, which lack a splicing mechanism.
b. cDNA libraries contain only the sequences from genes that are expressed in an organism.
c. cDNA libraries are the DNA fragment collections that are stored and propagated in host cells through cloning.
d. cDNA libraries contain more sequence information than genomic libraries.
The ways in which genomic and cDNA libraries differ is that the Genomic libraries are difficult to express in prokaryotic cells, which lack a splicing mechanism. Thus, the correct option for this question is A.
What do you mean by Genomic libraries?Genomic libraries may be defined as a group of overlapping segments of genomic DNA that is significantly cloned into a backbone vector, which statistically includes all regions of the genome of an organism efficiently in order to function normally.
On contrary, cDNA libraries may be characterized as the collection of cloned DNA sequences that are complementary to the mRNA and were remarkably extracted from an organism or tissue in order to stimulate its function.
Therefore, genomic libraries are difficult to express in prokaryotic cells, which lack a splicing mechanism is one of the ways in which genomic and cDNA libraries differ.
To learn more about Genomic libraries, refer to the link:
https://brainly.com/question/26266533
#SPJ5
Which conditions need to be in balance for cells to function? Check all that apply.