why should the solvent not touch the pencil line in chromatography ?

Answers

Answer 1

Answer:

The solvent level has to be below the starting line of the TLC, otherwise the spots will dissolve away.

Explanation:


Related Questions

What needs to happen to a carbohydrate before it is absorbed in the small intestine? A. It needs to be combined with other carbohydrates. B. It needs to be converted into amino acids. C. It needs to be broken down into simple sugars. D. It needs to travel from the stomach to the mouth.

Answers

Answer:

C.

Explanation:

Answer:

a

Explanation:

i looked it up (brainliest pls)

what is the significance of a chemical formula?​

Answers

Answer:

The significance of chemical formula is that it tells us a lot about the chemical reaction

like the name of elements involved in it, number of atom of each element and it also shows that which type of reaction is going on

like exothermic and endothermic, combination, decomposition etc

hope it helps

which level of organization does the neuron belong in

Answers

Answer:

CELL

Explanation:

what occurs overtime that would cause the Shy birds to become less common in the city?

Answers

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The major reason for bird species decline is loss of habitat, especially grasslands and forests. All have experienced declines in some areas since the 1960s and '70s, and further declines are anticipated, due to habitat loss and deforestation, and climate change

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When a sperm and egg combine, it is called _______________________________

Answers

Fertilization

Explanation:

When a sperm and egg combine, it is called fertilization.

Answer:

fertilization

Explanation:

describe how the sea snail and the periwinkle are connected to each other​

Answers

Answer:

they move together

Explanation:

lol

Answer:

They both crawl of the bottom of streams lakes ect.

They both have a shell like thing on them...lol

Explanation:

I tried... Sry if not correct

NEED HELP ASAP BIOLOGY 40 POINTS

Answers

Answer:

It's a frameshift mutation caused by the deletion of U

Structure III is a dipeptide (a union of two amino acids)

Someone please help.

Answers

Answer:

Because the duplicated chromatids remain joined during meiosis I, each daughter cell receives only one chromosome of each homologous pair. ... By shuffling the genetic deck in this way, the gametes resulting from meiosis II have new combinations of maternal and paternal chromosomes, increasing genetic diversity.

Explanation:

Please help! Due today!
How are the graphs of a body chemical controlled by negative feedback and a chemical controlled by positive feedback similar and how are they different?

Answers

Explanation:

This answer is already on brainly. type it word for word and it should pop up.

While taking a nature walk with their class, students observe many mushrooms growing among the fallen leaves on the forest floor.




– What is the role of mushrooms in the forest ecosystem?

– What other type of organism performs a similar role in the forest ecosystem?

This is for a writing thing can u guys write about it I really need help thank u

Answers

Answer:

The mushrooms act as decomposers, there are many other species that also does this such as worms

How are flagella in unicellular organisms like legs in humans??​

Answers

Cilia and flagella are more closely related, as they are both like hairy extensions from the cell membranes. However Cilia (singular: cilium) are much shorter and are arranged in multiple groups, working together in coordinated manner to create movement along the cell membrane (kind of like the legs of a centipede).

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Right handedness(R) is dominant to left handedness(r). If you have two parents that are right handed(Rr) and they have a child who is left handed(rr), the letters rr represent the _____________ of that child

Choices:
Genotype
Phenotype

Answers

Answer:

Phenotype

Explanation:

TACACCTTAGCGACGAC
AUGCUGGAAUCGCUGACU
Mutated DNA
Mrna Sequence
Amnio acid sequence
What type of mutation has occurred?

Answers

Answer:

3. transcription

I'm so sry I don't know the rest of them

hopefully this helped tho

¿Qué evidencias ocurrieron en el medio ambiente que llevaron a la evolución de un ojo complejo a partir de una versión más simple? ¿Para qué sirvió?

Answers

Answer:

- Evidencia: registro fósil

- Función: capacidad de distinguir depredadores  

Explanation:

Un ojo compuesto es una órgano sensorial altamente especializado compuesto por unas estructuras conocidas como omatidios, las cuales están a su vez compuestas por células fotorreceptoras. La superficie externa de un omatidio es una lente hexagonal, debajo de la cual se encuentra una lente cónica capaz de captar la onda lumínica. La evidencia más importante de animales con ojos complejos que habitaron el planeta hace millones de años fue el descubrimiento de un ojo fosilizado en un crustáceo (aprox. 515 millones de años atrás). El ojo de este animal estaba compuesto por miles de lentes. Interesantemente, las lentes del centro del ojo compuesto se destacaban por su mayor sensibilidad, lo cual se cree le conferían a este crustáceo la habilidad de distinguir mejor estructuras y formas en ambientes oscuros. En consecuencia, este descubrimiento soporta la idea de la evolución temprana de la vista como una característica fundamental que le habría conferido a una especie de crustáceo la posibilidad de distinguir fácilmente a sus depredadores.


Soil erosion leads to an increase of
pollution in water.

Answers

Answer:

True...I don't know if it is a T or F question!! SRY

Explanation:

Have a good night, and good luck!!

Which statement(s) are true about mutations? (select all that apply)

a. They can be neutral
b. They are only heritable if they occur in gametes
c . They are always heritable
d. They can be beneficial

Answers

C. they are always heritable. b. they are inly heritable in gametes

Answer:

a, c, d,

Explanation:

they are more than genetic, and with that said, also cancels out b

HELPP!! in classifying organisms, scientists use a system that separates organisms into smaller and smaller groups based on increasingly specific and similar characteristics. If you were to sort each of your three groups into smaller groups, what criteria would you use?
please help id.k this

Answers

you should to socratic it or something

A specific bird species lived in and around the swamps and lowlands in the Southeastern United States. Slowly, as more people
moved south, these lands were cleared. Over time, this bird species started disappearing. The last of these birds was seen in the
Late 1900's. The most likely reason for the birds disappearance was what?

Answers

specific bird species lived in and around the swamp and millions in the southern United States probably has more people who South East Windsor cloud over 10 Brewster is this game these birds simulator the most likely reason for the birds disappearance

A _________ fossil is formed when sediment covers an organism and forms the outer shape of the organism

Answers

Answer: the answer is mold

Don't forgat to drop a heart...

Explanation:

Describe three ways in which the atmosphere interacts with the geosphere. ​

Answers

Answer:

The atmosphere provides the geosphere with heat and energy needed for rock breakdown and erosion. The geosphere, in turn, reflects the sun's energy back into the atmosphere. The biosphere receives gases, heat, and sunlight (energy) from the atmosphere.

All of the following are characteristics that euglenoids share with plants except

heterotrophic
have chlorophyll
autotrophic
have chloroplasts

Answers

Autotrophic I believe

Epistasis, such as albinism, is a result of ______. polygenic inheritance. multiple alleles. incomplete dominance. . codominance.

Answers

Polygenic inheritance

a type of soil formed due to deposition in river beds​

Answers

Answer:

Hey mate.....

Explanation:

This is ur answer....

The soil formed by the deposition of silt brought by rivers is Alluvial soil. Alluvial soil is the main and important soil that spreads across the river plains. They are formed by deposition of materials or sediments (alluvium) brought in down by rivers that consist of silt, sand, clay, etc.

Hope it helps you,

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The unique properties of water enable life to exist on Earth. Which of these is a property of pure water?

Group of answer choices

its solid is more dense than its liquid

it is slightly more acidic than air

it has a low heat absorption capacity

it dissolves many substances

Answers

it dissolves many substances

Which of the following do not match?

Prokaryotic and Anaerobic OR Eukaryotic and Anaerobic0​

Answers

Eukaryotic and Anaerobic

ASAP NEEd HElp QuIcK
One day, you ride your bike to a local bookstore. You purchase a few of your favorite comic books, put them in your backpack, and ride home. Once you get home, you sit in a rocking chair and read your comic books. Which resource in this scenario is nonrenewable? the steel frame used to make the bike the paper used to make the comic books the cotton used to make the backpack the wood used to make the rocking chair

Answers

Answer:

A steel frame used to make a bike.

Answer:

A steel frame used to make a bike.

Explanation:

5 things you eat that contains corn,soy,rice,or potato's

Answers

Answer:

1. Tortilla Chips

2. Tacos

3. French fries

4. Soy sauce

5. Tofu

Explanation:

Trust Milky. Milky smart.

Answer:

1.) French fries, they are cooked in vegetable oil which contains corn

2.) Chinese food usually gives you that box of white rice

3.) Canned broth and/or soups have soy in them

4.) Hash browns contain potatoes

5.) Deli meat or just any processed meat have soy

When a warm front is approaching, what happens?
A. advancing cold air pushes up and over retreating warm air causing warm temperatures and mild rain
B. advancing cold air pushes up and over retreating warm air causing warm temperatures and mild rain

Answers

Answer:

B?

Explanation:

if warm temp is coming then cold air pushes over warm air causing warm temp

When a warm front is approaching then advancing cold air pushes up and over retreating warm air causing warm temperatures and mild rain. Option A is correct.

A warm front is a boundary between warm and cold air masses. When a warm front approaches, the warm air mass is forced to rise over the cold air mass. This causes the warm air to cool and condense, which produces clouds and rain. The rain is usually light and steady, and the temperatures are mild.

The warm air mass is less dense than the cold air mass, so it rises up over the cold air mass. As the warm air rises, it cools and condenses, forming clouds. The clouds produce light, steady rain as the warm air continues to rise. The temperatures are usually mild during a warm front, as the warm air mass is slowly mixing with the cold air mass. Option A is correct.

To know more about the Warm air, here

https://brainly.com/question/29516275

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During asexual reproduction, the offspring are....

genetically different from the parent

genetically different from each sibling

genetically identical to the parent

none of the above

Answers

Answer:c

Explanation:

Genetically identical because it is a replica of the parent

The offspring would be genetically identical to the parent due to it being a sort of clone and no new genes being added through a second parent.

What are gametes? How are gametes different from regular body (somatic) cells?

Answers

Answer:

Gamtetes are sex cells, for humans, this manifests as the sperm cell and the egg cell.

Explanation:

Gametes are haploid cells unlike most of our body cells that are diploid cells.

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There are 52 crayons in a box. There are 10 boxes in a carton. Mr. Johnson ordered 5 cartons of crayons for the school. How many crayons did he get? what is the surface area of the figure below This country suffers from unusual strong winds, droughts and floods due to the fact that it has no mountains within its borders. It is the second smallest South American country and its flag is an imitation of the Argentine flag. What flag is this? In guinea pigs, short fur (S) is dominant to long fur (s). Two heterozygous guinea pigs(Ss) mate. Complete the Punnett square and then list the percentages of theexpected genotypes for their offspring. Find all angles plssss What are some checks a credit union performs when hiring a new employee? (Select all that apply.)fingerprintingrunning a report on how many credit cards a person hasdoing a credit historychecking references Patricia Ness is a lawyer specializing in employment law. Her clients showed her that the right-to-work laws create many problems for unionized workers. Therefore, she has started a petition to change the situation. In addition, she publishes a blog on the topic, and she takes every opportunity to talk publicly about the issue. Her tendency to identify opportunities, show initiative, take action, and persevere is typical of this personality trait.a. Conscientious Personality b. Introverted Personalityc. Narcissistic Personalityd. Sell Monitoring Personalitye. Proactive Personality A jar contains 660 beans. Of them, 440 are kidney beans and the rest are cranberrybeans. What is the ratio of kidney beans to all beans? Please help Select the correct answer.A patient is sick from Influenza. What kind of pathogen is this?OA.virusOB.bacteriaO C. fungiOD. helminthesOE.protozoa Someone please help me! GIVING BRAINLIESTIf you receive three successive discounts of 36%, 25% and 30%, you receive the same savings as one big discount of:a) 33.6% b) 66.4% c) 71% d) 88% e) 88.5% After Mabel Dodge Luhan arrived in New Mexico, what preparations did she make to bring artists and writers to NewMexico? write each of the following in scientific notation, correct to 2 decimal places.a. 0.00000123 Nb. 417 000 000 kgc. 246800 Ad. 0,00088 mm Which is an example of a complex sentence?[A]I wore a sweater for my afternoon walk because the temperature dropped.[B]My newly formed soccer team played on the newly built ball field.[C]I ran quickly, but I still missed the morning bus.[D]It was raining hard, so I rushed and closed all the windows. Find an equation for the slant asymptote of y=- 323 622 + 6x + 39x2 8Submit Question The diameter of a peacan pie is 7 inches. What is the circumference? the answer choices are : TrinomialMonomialBinomialNone of these PLEASE HELP! 20 PTSChoose ALL that apply for spring tides Question 1 options:Moon, Sun, and Earth are perpendicular Moon, Sun, and Earth are aligned Highest of the high tides and lowest of the low tides. Occur twice a month I tried A and B. and it was wrong. how do i calculate the portion walking in degrees total hours (50) and walking is (10) I need help ASAP! I need to get done with Government because Im having a baby in 3 weeks and Im trying to get done with school early!!!! Yes it may be easy but I couldnt find the answer.