Why should latex gloves be worn when preparing chromatography plates?

Answers

Answer 1
to prevent the risk of contamination
Answer 2
The reason to wear latex gloves is to protect your hands from getting contained.

Related Questions

A client complains to the health care provider that he keeps getting hard skin on the sides of the great and little toes when he wears certain pairs of shoes.

Answers

This is probably caused by ill-fitting shoes putting pressure on certain areas of the foot and would be called a Corn.
In this context, corn refers to some sort of calluses that appear if we constantly use ill-fitting shoes. The pressure that caused by the ill-fitting shoes will create some sort friction that will make the skin on that area become thicken.

One of the hallmarks of community health promotion is its emphasis on improving

Answers

One of the hallmarks of community health promotion is its emphasis on improving common health-related resources. They mainly focus on improving the health conditions for the normal people. They also train the students by organizing various camps and provide medical facilities to underprivileged people in the community.

Why did early naturalists think that sponges were plants and not animals?

Answers

Early naturalists regarded sponges as plants due to their lack of obvious movement as well as there distinctive branching form. Sponges do not have any organs and their skeleton is fibrous. It wasn't until 1755 and later confirmed by observation in 1765, that changes in the diameter the openings to their central cavity were described, thus proving the animal nature of sponges.

Trilobites are index fossils because they ____.
a.
changed slowly through time
c.
exhibit specific characteristics
b.
lived over large areas of the world
d.
all of the above

Answers

The correct answer is letter D). all of the above. Trilobites are index fossils because they changed slowly through time. They  also exhibit specific characteristics and lived over large areas of the world.

Answer:

d. all of the above

Explanation:

Trilobites are an extinct class of marine arthropods, having been one of the most frequent fossil groups in the period between the Cambric and the Devonian, and are at this time still quite biologically diverse. Trilobite fossils are considered index fossils because they change slowly over time, exhibit specific characteristics and have lived in large areas of the world.

Index fossils refer to an organism that has had a wide geographical distribution in the past, although it has lived for short periods of time, and whose remains have not only been conserved in abundance but are also easy to identify.

State one possible reason why a gene for the production of a human hormones would be placed in bacterial DNA

Answers

You can introduce the gene into bacteria in order to allow the bacteria to produce more of the hormone.

A gene for human hormone production might be inserted into bacterial DNA to facilitate the large-scale, industrial manufacture of hormones such as insulin and human growth hormone using recombinant DNA technology, avoiding allergic reactions from animal-sourced hormones.

One possible reason why a gene for the production of a human hormone would be placed in bacterial DNA is to manufacture the hormone on an industrial scale using recombinant DNA technology. This process has been used successfully as early as 1978 to produce human insulin, which is critical for treating diabetic patients. Using Escherichia coli (E. coli) bacteria as hosts, the human hormone genes, such as the one for insulin or human growth hormone (HGH), are inserted into the bacterial DNA, enabling bacteria to produce these hormones. This method eliminates allergic reactions that some patients experience when treated with hormones obtained from animals, such as pig insulin, and it allows for the mass production of hormones that are identical to those naturally produced by the human body.

Communication between members of the same species is referred to as _______ communication.
A. interspecific
C. innate
B. intraspecific
D. intention

Answers

The answer is c infraspecific
I agree with the person above - the correct answer is B. intraspecific.
The word intra means 'within one,' so obviously you would pick this option to refer to communication between members within one single species.
Interspecific means among members of different species, and innate and intention communication are not applicable here.

What are the building blocks of minerals?

a. rocks
b. elements
c. isotopes
d. electrons

Answers

the answer should be B

A single layer of irregularly shaped epithelial cells found lining the respiratory tract is called

Answers

diptheria. go see your doctor.

List and define major chemical bonds used to connect biological molecules

Answers

Ionic boning involves a transfer of an electron, so one atom gains an electron while one atom loses an electron. One of the resulting ions carries a negative charge (anion), and the other ion carries a positive charge (cation). Because opposite charges attract, the atoms bond together to form a molecule.
The most common bond in organic molecules, a covalent bond involves the sharing of electrons between two atoms. The pair of shared electrons forms a new orbit that extends around the nuclei of both atoms, producing a molecule. There are two secondary types of covalent bonds that are relevant to biology — polar bonds and hydrogen bonds.
Two atoms connected by a covalent bond may exert different attractions for the electrons in the bond, producing an unevenly distributed charge. The result is known as a polar bond, an intermediate case between ionic and covalent bonding, with one end of the molecule slightly negatively charged and the other end slightly positively charged.
Because they’re polarized, two adjacent H2O (water) molecules can form a linkage known as a hydrogen bond, where the (electronegative) hydrogen atom of one H2O molecule is electrostatically attracted to the (electropositive) oxygen atom of an adjacent water molecule.

Cigarette smoke can affect cell differentiation during embryo development. Which would be the most likely effect of cigarette smoke?

Answers

That it can cause lung cancer and that you could die from it

it can cause childhood asthma....

Describe an experiment to investigate the effect of training on subjects ability to run faster without respire get anaerobically

Answers

A runner HAS to use the anaerobic respiration process,first we need to know the difference between anaerobic respiration and aeorobic respiration 

Anaerobic respiration is done by burning glucose directly without the presence of oxygen giving out lactic acid and energy 
Aerobic respiration is done by burning glucose and oxygen giving out water + engergy + Co2 

1.) Take a stop-watch 
2.) Take TWO or more runners 
3.) Unlike Olympic race match ask ONE of the runners to run their fastes and the others to GRADUALLY speed up 
4.) make the runners breath hard for air 
5.) after finish line 
6.) do a test of Lactic through urin test or use Lactometer (don't ask me how to use it 'cause I don't know lol) 
7.) check the concerntration 
8.) whoever has the LOWEST concerntration,take that runner time for running and meter to find speed you'll be able to spot out who has used aerobic respiration during the race

A runner will have to use anaerobic respiration process,first of all we must need to know the basic difference between the anaerobic respiration and aerobic type of respiration.

What is anaerobic respiration?

Anaerobic respiration has been performed  by the burning of the glucose directly just without the presence of the oxygen giving out the lactic acid as well as energy. Aerobic respiration has been done by the burning glucose as well as oxygen giving out water + engergy + Co2

The basic steps that has been taken to observe the aerobic respiration during race.

Immedietly Take a stop-watch Than Take TWO or more runners Just Unlike Olympic race match ask one of the runners to run their fastes and the others to gradually just speed up. Kindly make the runners breath hard for the air Just do a test of Lactic through urine test or use Lactometer check the concentration frequentlywhoever has the lower concentration, just take that runner time for running and meter to find speed you'll be able to spot out who has used aerobic respiration during the race.

Therefore, A runner will have to use anaerobic respiration process,first of all we must need to know the basic difference between the anaerobic respiration and aerobic type of respiration.

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What is the difference between a cell, a tissue, an organ, and a system in an animals body

Answers

all of them are Levels of Organization of Living Things

Cars with hybrid and electric motors ____ ?
a. Are no longer produced
b. Use solar panels for power
c. Creates less air pollution than conventional cars
d. Use more fuel than conventional cars

Answers

C.) would be the correct answer, hope this helps (:
ANSWER: create less air pollution than conventional cars

Frank performs a contract with gene to add a garage to gene’s property, but gene does not pay. frank can file a lien on gene’s property if, from the last date labor or materials were provided, he acts​

Answers

With the given scenario above, Frank can file a lien on the property of Gene from the beginning last date labor or the materials that were provided, he can act within the days of sixty up until one hundred twenty days.

Tina has a history of asthma. what sounds might you hear during an asthma exacerbation?

Answers

Final answer:

During an asthma exacerbation, wheezing and possibly crackling sounds may be heard, along with decreased breath sounds if the attack is severe.

Explanation:

These sounds include wheezing, which is a high-pitched whistling sound caused by the restriction of airflow, and is most pronounced when exhaling.

Additionally, during more severe attacks, a health professional might hear decreased breath sounds due to reduced air movement within the lungs. In some cases, a crackling sound can be heard, suggesting the presence of mucus in the airways. It is also possible to encounter signs of increased work of breathing such as the use of accessory muscles during respiration.

Asthma is a chronic respiratory condition where the airway passages narrow and are often accompanied by excessive mucus production, leading to symptoms such as difficulty breathing, coughing, and chest tightness. Triggers like allergens, air pollution, infections, and exercise can provoke these asthma attacks.

Prompt and proper management of an asthma attack, especially if presenting severe symptoms such as cyanotic lips or confusion, is imperative for an asthmatic individual, and may involve the use of fast-acting medications like bronchodilators.

Which of the following is the best example of a positive correlation

Answers

Your chances of getting an A increase as the difficulty of the test decreases. Hence the correct option is b.

A positive correlation implies that as one variable increases, the other variable also increases. In the provided example, the statement "Your chances of getting an A increase as the difficulty of the test decreases" exemplifies a positive correlation. This suggests that when the difficulty level of a test decreases, the likelihood of achieving an A grade increases.

As the complexity of the test diminishes, students are more likely to perform well, leading to higher grades. This positive relationship between the ease of the test and the likelihood of obtaining an A aligns with the concept of a positive correlation, where the variables move in the same direction, reinforcing the idea that easier tests are associated with higher grades. Hence the correct option is b.

Complete question:

Which of the following is the best example of a positive correlation? Multiple Choice

The less interesting the lecture, the less likely you are to remember everything the instructor said. Your chances of getting an A increase as the difficulty of the test decreases. Alicia loves to eat ice cream on hot afternoons. You should study longer because that helps you get a better grade.

Why are a bacteria a necessary part of nitrogen cycle?

Answers

Bacteria breaks the proteins down in plants and animals bodies which go into ammonia through the decay process.



 I hope this helps 

Slopes that drop or rise sharply in elevation are:

Answers

Final answer:

Steep slopes are geographical features that rise or drop significantly in elevation over a short distance. Examples are found in mountainous areas or cliffs by the sea.

Explanation:

Slopes that drop or rise sharply in elevation are commonly referred to as steep slopes. These geographical features are characterized by an abrupt change in altitude, with the land rising or falling significantly over a short distance. Steep slopes occur naturally in mountainous or hilly areas. A cliff by the sea, or the side of a mountain range, are good examples of this geographical feature. They're significant because they influence elements like climate, vegetation, and human habitation, as living or farming on a steep slope can be challenging.

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Final answer:

Steep slopes, in mathematical terms, are represented by a plate with a high positive or negative slope. In geographical context, these are typically found in mountain areas where erosion forms sharply rising or falling landscapes.

Explanation:

Slopes that drop or rise sharply in elevation are referred as steep slopes. In the context of a graph or a line in mathematics, these are represented by lines with a high positive or negative slope. The slope is defined by how much y (vertical distance) changes for each unit of x (horizontal distance) or 'rise over run'.

In geographical terms, steep slopes are commonly found in mountain ranges, where erosion by water and ice create sharp peaks and serrated edges. For example, a mountain formed by upthrusting of the crust will have its rocks subject to erosion, resulting in a steep slope. These are visibly different to the smooth, dull slopes found on non-eroded surfaces such as those found on the Moon or Mercury.

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What is the purpose of the biogeochemical cycles?

-to cycle energy through a food chain

-to recycle matter through the biosphere

-to recycle rocks through the layers of Earth

-to cycle nutrients through the human body

Answers

The correct option is B.
The biogeochemical cycle refers to the pathway through which chemical substances are recycle through the biotic and the abiotic components of the earth. There are many types of biogeochemical cycles, examples include: water cycle, carbon cycle, nitrogen cycle, etc.

Answer:

B

Explanation:

Which bone is most commonly used to determine the height of the deceased?

Answers

The bone that's most commonly used to determine the height of the deceased is the femur (although the humerus can also be used). The femur is measured in cm and the calculations may very according to the gender of the deceased and can be accurate within 5 cm.
The femur is a long bone that is hard and, therefore, can keep its integrity longer. As well as it is a bone that generally is proportional to the body.

In medicine, why do you think it is important that re-evaluation is part of the scientific process?

Answers

A false conclusion or test is a definite possibility in any medical test. It is important that the experiment is tested more than once to ensure a more probable solution, rather than take the chance that is could be a false conclusion.

how is telomerase activity different from DNA polymerase activity during DNA elongation?

Answers

During DNA elongation, the polymerase enzyme add free nucleotide to the three prime end of the newly forming strand making it to grow in the five prime three prime direction while the telomerase adds complementary RNA base to the three prime end of the DNA strand.

Which part of a watershed is a lake or even an ocean where the water ends up?
A. The basin
B. The divide
C. The collection area
D.The boundary

Answers

Answer:

A. The basin

Explanation:

pioneer plant species can be described as those that

Answers

are small in size , and have highly effective means and dispersing their seeds.

Answer:

Pioneer plant A plant that occurs early in a vegetational succession. Pioneer species possess characters that suit them to their ecological niches, notably rapid growth, the production of copious, small, easily dispersed seed, and the ability to germinate and establish themselves on open sites.

Explanation:

What is the complementary dna base sequence to the dna strand tgccat?

Answers

it has nine lives right?

Pls Help Me


Plants do not adapt to their environment because they do not compete for resources. Please select the best answer from the choices provided T F

Answers

thats false because a plant can adapt too lack of water or temperature

The statement "Plants do not adapt to their environment because they do not compete for resources" is absolutely false.

What is an Environment?

An environment may be defined as anything which is present in the surroundings of a living organism. The term environment was given by Carlyle.

Plants generally adapt to the environment in the worst situation as well. If there is less water available, they adapt accordingly by closing their stomata in order to prevent water loss.

If there is more temperature outside, they generally thicken their stem region in order to withstand in high temperatures as well. Plants can alter the rate of photosynthesis according to their needs.

Therefore, the statement "Plants do not adapt to their environment because they do not compete for resources" is absolutely false.

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What two components are often found as part of an enzyme?

Answers

Simple Enzymes: Usually composed of proteins. It is peptide bonds that linked the amino acids

Conjugated Enzymes: have two parts. The protein and non protein portion.

protein and non-protein, also called a cofactor

Why does fast-moving water lead to greater erosion than slow-moving water?


It has more energy.


It usually flows in a straight line.


It evaporates faster.


The particles it carries are smaller.

Answers

because it has more energy
The answer would be it has more energy. The faster something moves, the more energy it has and the amount of friction applied it greater than it would be if it was moving slower

If all of geologic time is represented as a single year, and the jurassic period is in the middle of the mesozoic era, what month were dinosaurs most abundant on the planet?

Answers

If all of geologic time is represented as a single year, and the Jurassic period is in the middle of the Mesozoic era, than dinosaurs would be most abundant on the planet during the month of December. This is because the Mesozoic Era as an interval of geological time took place from about 252 to 66 million years ago, while earth's time scale is about 4.54 billion years old, and all of geological time even older. Compared to all of the geological time, dinosaurs are fairly recent.

Final answer:

Dinosaurs were most abundant during the Jurassic period, the middle period of the Mesozoic Era. If geologic time were condensed into a single year, the peak abundance of dinosaurs, corresponding to the Jurassic period, would fall around the 'summer months,' particularly from June to August.

Explanation:

If we represent all of geologic time as a single year, the Mesozoic Era, known as the Age of Reptiles, would be a significant part of that timeline. During the Mesozoic Era, there were three major periods: Triassic, Jurassic, and Cretaceous. The Jurassic period is recognized as the middle period of the Mesozoic Era, often referred to as the golden age of dinosaurs due to their abundance during this time.

Dinosaurs became increasingly important throughout the Mesozoic Era, filling most terrestrial niches and dominating the landscapes. They first appeared during the Triassic period, around 251 million years ago, and their domination continued through the Jurassic, reaching their peak, until their extinction at the end of the Cretaceous period, approximately 66 million years ago.

Assuming the Mesozoic Era spans from January to December in a single calendar year, the Jurassic period would be situated roughly from late April to mid-September, with dinosaurs being most abundant during the 'summer months' of this hypothetical geologic calendar. Therefore, if geologic time were a single year, dinosaurs would have been most abundant around June to August, the middle of the Mesozoic Era's equivalent to the summer.

Agustín Iturbide was _____.

Answers

He was a Mexican politician and an army general.

Answer:

a Creole Royalist general

Explanation:

I'm not sure if this is the correct answer

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