Chromatography is a process for separating components of a mixture. ... The different components of the mixture travel through the stationary phase at different speeds, causing them to separate from one another.
There are four main types of chromatography. These are Liquid Chromatography, Gas Chromatography, Thin-Layer Chromatography and Paper Chromatography.
Liquid Chromatography is used in the world to test water samples to look for pollution in lakes and rivers.
Answer:
Chromatography is a method used by scientists for separating organic and inorganic compounds so that they can be analyzed and studied.
Types of chromatography are:
-Column chromatography
-Ion-exchange chromatography
-Gel permeation (molecular sieve) chromatography
-Paper chromatography
-Thin-layer chromatography
-Gas chromatography
-Dye-ligand chromatography
-Hydrophobic interaction chromatography
-Pseudo affinity chromatography
-High press chromatography (HPLC)
Explanation:
Determine which of the following pairs of organisms are two separate species.
A. A brown eyed person and a blue eyed person who reproduce to get children with brown or blue eyes
B. A green poison dart frog and a blue poison dart frog that can reproduce to get many different colors of
poison dart frog.
C. A horse and a donkey that can reproduce to get infertile mules.
D. A Labrador dog and Poodle dog that can reproduce and produce a Labradoodle dog.
Reset Selection
Answer:D
Explanation:
Poodles and labs come from different species
What would happen to a plant if the chloroplasts in its cells became damaged?
Answer:
The plant would die.
Explanation:
The plant's chloroplasts are the organelles that do photosynthesis. They provide sugar (food/energy) for the plant. Without this food, the plant can't carry out other functions like growing and reproducing. Just like any other organism, the plant will die once it runs out of energy.
Please can someone help me fast
Answer:
A. i guess! not sure but try<3
How many liters of water does the European Food Safety recommend daily
Answer:
2.5 L/day
Explanation:
2.5 L for men and 2.0 L for women
Fracking uses highly pressurized fluids, such as water mixed with sand and chemicals, to drive open cracks that exist in underground rock. Which
statement best describes an environmental consequence of this process?
• Chemicals added to the liquid can contaminate groundwater.
O Wastewater is contaminated with oil and becomes sludge in landfills.
Water vapor is released into the air, which is considered a greenhouse gas.
Heavy metals are released into surrounding soil, poisoning local vegetation
The correct answer is that chemicals added to the liquid can contaminate groundwater.
Fracking is a method of drilling fossil energy resources, which requires a lot of water and consumes local water resources. It is pumped with high pressure water, sand and chemicals, causing high pressure to block the porous rock and release gas.
The water spill itself destroys nature from the drilling site, and may even cause earthquakes, especially due to the pumping of abundant wastewater into porous rock types such as limestone. For example, Oklahoma appears to have become a special earthquake risk area. The biggest impact of water distortion is on groundwater. In Wyoming, USA, the same chemicals found in groundwater have been found in groundwater, and some of them are toxic or carcinogenic.
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Answer:
Wait so the answer is A?
Explanation:
A student is learning about infections that can
occur in the human body. Infections could be
caused by viruses, bacteria, and fungus. The
student learns about two infections, influenza and
ringworm, and creates a table that describes the
infections.
11.Oxides of sulfur and nitrogen that combine
with water vapor cause
a. hydrolysis.
b. acid rain.
c. mechanical weathering.
d. carbonation
Answer:
[tex]\huge\boxed{\sf Acid \ Rain}[/tex]
Explanation:
Oxides of sulfur and nitrogen combine with air and water vapors to produce more acidic substances (low pH) and consequently, acid rain is produced which can be of great damage for the living and non-living things on the Earth.
[tex]\rule[225]{225}{2}[/tex]
Hope this helped!
~AH1807Peace!European frog's-bit is a free-floating plant with clustered heart-shaped leaves. Resembling small water lilies, frog's bit has white flowers with three petals and yellow centers that bloom in the summer. European Frog's-bit is native to Europe but was introduced to North America in the 1930s as an ornamental pond plant. It is one of eleven invasive aquatic species identified in Maine law as illegal to import, sell, and transport. What is a way to prevent its spread in Maine lakes and ponds?
Answer:
The correct answer is - D) Educational outreach and watercraft inspections at boat ramps to keep infestation from migrating from one water body to another.
Explanation:
I just did the USA Test Prep and this is the correct answer! Hope this is helpful!!! Please up vote to help others!
The main reason for the spread of European frog's bit in Maine lakes and ponds is by boats and wildlife.
What do you mean by Invasive Species?Invasive species may be defined as species that cause ecological or economic harm in a new environment where it is not native.
Invasive species are prevented to spread in order to reduce their effect on ecological as well as economic points of view.
The best way to prevent the spread of European frog's bit is to spread awareness of its harm through educational outreach, banned their migration at the international level, and always remove visible mud and plants before leaving a water body.
Therefore, it is well described above.
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what is sciense and it example
Answer:
please mark me brainliest
Explanation:
Science is the study of the nature and behaviour of natural things and the knowledge that we obtain about them. ... A science is a particular branch of science such as physics, chemistry, or biology. Physics is the best example of a science which has developed strong, abstract theories. ... the science of microbiology.
Use the drop-down tool to select the best study technique for each situation.
Learning the relationships between the muscle systems in the body.
Memorizing the definitions for diseases.
Improving at measuring doses of medicine.
Finding a new technique to solve a problem.
Answer:
1. diagrams
2. flash cards
3. practicing skills
4. study groups
Explanation:
which pathways can a red blood cell take
Answer:
Red blood cells are capable of limited aerobic glycolysis through the hexose monophosphate shunt, also called the phosphogluconate pathway or the pentose phosphate shunt.
What stores materials that the
cell won't use immediately?
Would life on Earth be possible without the air,
water, soil and rock? Explain your answer.
Answer:
If soil would not be there on earth then we will not be able to grow plants and if we don't plant trees then we will not get essential products and we will not be able to survive .
Explanation:
PLEASE help!!! Someone!!! I am confused and this is my last page before I submit!!!
Answer:
In the picture attached
Explanation:
Which of the following statements about the tundra is accurate?
A:The tundra has four distinct seasons.
B:Most people who live in the tundra are farmers.
C:The tundra is very cold, but has high levels of precipitation.
D:Despite its cold climate, the tundra is home to numerous species of wildlife, including caribou and reindeer.
Explanation:
D:Despite its cold climate, the tundra is home to numerous species of wildlife, including caribou and reindeer.
its d
Which one of the following is a defining characteristic of animals but not of plants? Group of answer choices Animals, but not plants, are autotrophs Animals, but not plants, are eukaryotes Animals, but not plants, are heterotrophs Animals, but not plants, are prokaryotes
Answer:
the given characteristic of animals but not of plants are:
eukaryotic animal
heterotrophs animals.
The characteristic that defines animals but not plants is that animals, but not plants, are heterotrophs.
What are heterotrophs?Heterotrophs are living organisms that are incapable of synthesizing their own food, like autotrophs.
Plants are autotrophic in nature meaning that they can produce their own food using sunlight energy.
All animals are heterotrophic in nature i.e. do not exhibit any form of autotrophism.
Therefore, the characteristic that defines animals but not plants is that animals, but not plants, are heterotrophs.
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Complete the sentence. Lobbyists of ______________ use access to political leaders and other federal members to attempt to influence environmental policy.
the courts
Congress
interest groups
the presidency
Answer:
interest groups is the correct answer
hope this helps:)
Lobbyists of interest groups use access to political leaders and other federal members to attempt to influence environmental policy. Thus, the correct option is C.
What is Environmental policy?An Environmental policy may be characterized as any standard through which a government, corporation, or other public or private organization associates the concerns of human activities on the environment.
A person who is employed, contracts for economic considerations, and receives payment interferes with the political leaders and other federal members with the help of their interest groups and significantly attempts to influence environmental policy.
It is the method that is systematically approached by such lobbyists to make alterations in the environmental policies either directly or indirectly.
Therefore, lobbyists of interest groups use access to political leaders and other federal members to attempt to influence environmental policy. Thus, the correct option is C.
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Which atom keeps the electrons closer to it most of the time? (the one with the electrons on
chains in the picture)
Answer:
oxygen
Explanation:
Atoms of oxygen are electronegative and attract the shared electrons in their covalent bonds. Consequently the electrons in the water molecule spend slightly more time around the oxygen atomic center and less time around the hydrogen atomic centers.Which of the following is not a form of mass communication?
a newspapers
b. televisions
C. Internet
d job interview
Please select the best answer from the choices provided
A
B
C
D
Answer:
D .job interview...........
Answer:
Answer is D job interview.
When you have ____________ the breathing passages become narrower and may clogged with mucus
Which blood vessels would constrict quickly if you walked outside into a cold windy winter day without putting on extra layers of clothing?
a. blood vessels to the skin
b. blood vessels to the intestines
c. blood vessels to the lungs
d. blood vessels to the heart
e. blood vessels to the brain
Explanation:
blood vessels to the skin
What elements make metal
Answer:
Iron.
Uranium.
Sodium.
Aluminum.
Calcium.
Explanation:
An unsaturated fat has the maximum number of hydrogens attached to the carbon backbone.
True
False
Answer:
The answer is true.. it is attached to the carbon backbone.
The statement "An unsaturated fat has the maximum number of hydrogens attached to the carbon backbone" is definitely true.
What is Unsaturated fat?Unsaturated fat may be defined as a kind of fat carrying a high proportion of fatty acid molecules with at least one double bond. This type of fatty acid is considered to be healthier in the diet than saturated fat.
An unsaturated fat generally contains almost all of the hydrogen atoms which are directly attached to the carbon backbone in a series of systematic arrangements.
Unsaturated fat is typically fatty acid that remains liquid at room temperature and comes from a plant, such as olive, peanut, corn, cottonseed, etc.
Therefore, the statement "An unsaturated fat has the maximum number of hydrogens attached to the carbon backbone" is definitely true.
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what is the values of pOH 0.020M HNO3
Answer:
pOH is 12.3
Explanation:
let's first get the pH of nitric acid:
[tex]{ \sf{pH = - log[H {}^{ + } ]}}[/tex]
but:
[H†] = 0.020 M
therefore:
[tex]{ \sf{pH = - log(0.020) }} \\ { \sf{pH = 1.7}}[/tex]
but, pOH = 14 - pH
[tex]{ \sf{pOH = 14 - 1.7}} \\ { \sf{pOH = 12.3}}[/tex]
please help me please
Answer:
Soft skills are character traits and interpersonal skills. Soft skills are abilities that relate to how you work and how you interact with other people.
List of soft skills:
LeadershipTeamworkCommunicationOrganizationManagement, etc.The importance of soft skills,
Skills such as listening and writing ensure that there is a smooth flow of ideas without any conflicts. This creates a productive and healthy work environment.Good communication and negotiation skills.Future workplaces will depend more of these skills (soft skills).high levels of pollution will most likely
Answer:
It could cause acid rain.
Explain why a relatively large forest can only support a
small number of wolves.
Answer:
below
Explanation:
It's not necessarily that a large forest can only have a small population of wolves because a larger population will not affect the ecosystem that much but it just depends on the area. One forest may have more prey than others which the wolves rely to eat and stay healthy. So yes it would be preferred to have a smaller population but again, it doesn't hurt to have a large one either. The main problem with having a larger population of wolves can be one of two issues;
To many wolves to feed with less prey.To many wolves are going to want to fight for being the alpha in the pack.Best of Luck!
HELP FAST PLEASE FAST
Answer:
A carrier is right answer
Which of the following is a reactant during cellular respiration?
Carbon dioxide
Glucose
Energy
Water
Answer:
Glucose
Explanation:
In the process of cellular respiration, glucose and oxygen combines to produce products such as carbon dioxide and water.
Reactant+ Reactant= Product.
Glucose (Reactant)+ Oxygen (Reactant)= Carbon Dioxide (Product) and Water (Product) (C02)
Hope this helps!
The one that is a reactant during cellular respiration is Glucose. The correct option is B.
What is cellular respiration?Cellular respiration is a process of breakdown of food material to produce energy that is then saved in the form of ATP. The process occurs when oxygen is combined with food and produces energy and reduces the waste material removed from the body.
The chemical process includes four processes that occur in sequence to carry out the whole process. The processes are glycolysis, pyruvate oxidation, the citric acid or Krebs cycle, and oxidative phosphorylation.
All food that we eat gives us different macromolecules, glucose is the main source of energy. So glucose is converted into energy.
Thus, the correct option is B. Glucose.
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If the mother has a recessive condition (two copies of the gene) and the father is a carrier of a recessive trait, what is the probability for their children to inherit the trait?
Choose one answer
a)
25%
b)
75%
c)
50%
d)
100%
Answer: [D] 100%.
Explanation: