which of the three methods of recrystallization grows the largest crystals
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Answer:
The scientist dissolves the mixture of products in hot water, and then lets the mixture cool. As the mixture cools, one product slowly appears as crystals, which can then be removed from the rest of the liquid, which has the other product.
Why do you think the crystals appear when the solution is cooled? It has to do with the fact that every solid that can be dissolved in water has a solubility, which is the largest quantity of the solid that can be dissolved in the water to make a clear solution. When the water starts getting cloudy and you can see solid particles floating around, that means no more solid can dissolve into the water and the solution (water and solid mixture) is saturated. But, the solubility of most solids increases as the mixture is heated, so more of the solid can be dissolved in hot water than in cold water. For instance, imagine you are making a cup of tea—you might notice that you can dissolve more sugar in hot tea than in iced tea. Give it a try and you will probably see sugar crystals at the bottom of the iced tea glass, even after you have stirred it.
When a hot saturated solution is cooled, however, there is suddenly more solid in the solution than can normally be contained by the cooler water. The hot saturated solution is known as a supersaturated solution because more solid was dissolved in it than can be dissolved under normal (cooler) conditions. Because it can no longer stay dissolved in the water, some of the bits of solid fall out of the solution. As they do this, they bump into each other, stick together, and form larger and larger pieces, called crystals. A crystal is a solid made of molecules (tiny little pieces too small to even be seen by most microscopes) that have come together in a specific repeated pattern, like in Figure 1, below. Going back to the tea example, if you made a saturated solution of hot tea and sugar and then let it cool, under the right conditions, you would be able to see small sugar crystals forming.
Related Questions
Which types of energy are parts of the energy released from the sun?
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Answer:
heat and light.
*In addition to the bacterial, virus, fungus, some microorganisms live under the sea*what are they?
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A microorganism (or microbe) is any microscopic living organism or virus, that is too small to see with the unaided human eye without magnification. Microorganisms are very diverse. They can be single-celled or multicellular and include bacteria, archaea, viruses and most protozoa, as well as some fungi, algae, and animals, such as rotifers and copepods. Many macroscopic animals and plants have microscopic juvenile stages. Some microbiologists also classify biologically active entities such as viruses and viroids as microorganisms, but others consider these as non-living.
Which organelle is marked with an X?
Answers
Answer:
chloroplast
Explanation:
What are chloroplasts?
Chloroplasts are cellular organelles that are present in plant cells only. Chloroplasts are a doubled membrane organelle that contains a matrix inside of itself called the stroma.
Inside the chloroplasts, stacks of thylakoids are presently called the grana. Inside the grana, a green pigment is present. This is called chlorophyll.
Chlorophyll is the pigment responsible for carrying out photosynthesis in plants. Chlorophyll is able to trap sunlight, whose energy is used for splitting water molecules and the formation of glucose.
Therefore, chloroplasts are only present in plant cells. Chloroplasts are one of three types of plastids present in plants. The other types of plastid are chromoplast and leucoplast. Chromoplast is present in fruits and contain carotenoid pigments. Leucoplast is non-pigmented and is present in non-photosynthetic plant regions.
pinus strobus is the scientific name for the white pine. pinus is the
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Large, native to eastern North America, Pinus strobus is also known as the eastern white pine, northern white pine, white pine, Weymouth pine (British), and soft pine.
Pinus strobus definitions. a tall pine from the eastern part of North America; bark is brown with longitudinal gaps when mature; esteemed as a wood tree. synonyms: Weymouth pine, eastern white pine, and American white pine
Interior trim, paneling, and doors are just a few examples of the many uses for pine in interior finishing. Additionally, exterior finishes like log siding and timber trusses frequently make use of it. White pine is known for being unbelievably serviceable, even manually.
White Pines are so named in light of the shade of their wood. Monticola signifies "mountain inhabitant." Relationships: There are approximately 35 species of pines in North America, out of 115 worldwide. Pine needles are borne in fascicles or bundles.
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What could the hardness of a mineral be if it can be scratched by your fingernail?
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cellular respiration releases energy by breaking down
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PLEASE HELP!
What situation is an example of artificial selection?
Select one:
a. More African elephants today naturally lack tusks compared to the elephant populations 100 years ago, because big game hunters sought elephants for ivory.
b. Female bluegill fish prefer to lay their eggs in the nests of larger male fish.
c. Albino deer or rabbits have a low survival rate in nature, because it is easy for predators to spot them.
d. Penguins with higher body fat tend to survive nesting in the Antarctic winter, while leaner penguins often die.
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Answer: A
Explanation: In artificial selection, humans determine what traits get passed down. For B, humans play no role in where the fish lays her eggs. For C, humans aren’t the ones killing the deer and rabbits — natural predators are. As a result, humans play no role. For D, humans also play no role in deciding which penguin lives.
For A, however, humans have caused African elephants to naturally lack tusks because of their hunting — this wasn’t natural or due to the environment. This was due to human intervention. As a result, it is artificial selection.
a heritable trait that can be compared across organisms?
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A heritable trait that can be compared across organisms is a characteristic that is passed down from one generation to another and can be observed in multiple species. Examples of such traits include eye color, hair color, height, and blood type.
These traits are considered to be heritable because they are determined by an individual's genetic makeup, which is inherited from their parents. By comparing these traits across different organisms, scientists can gain insights into evolutionary relationships and genetic variation.
For instance, comparing eye color in different populations can help identify genetic differences that have arisen due to geographic isolation or environmental pressures. Overall, heritable traits provide a valuable tool for studying genetic diversity and evolution across species.
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What are the four characteristics that every cell contain regardless if it is Prokaryotic or Eukaryotic
Answers
Answer:
They both have a
1. plasma membrane
2.cytoplasm
3.DNA
4.Ribosomes
Explanation:
These are the 4 characteristics/components that every cell contain regardless if it is Pro or eukaryotic
Every cell, whether prokaryotic or eukaryotic, shares four fundamental characteristics. Firstly, all cells are enclosed by a plasma membrane that separates the cell's interior from its external environment.
Secondly, cells contain genetic material, either in the form of DNA (prokaryotes) or within a membrane-bound nucleus (eukaryotes), which carries hereditary information.
Thirdly, cells possess cytoplasm, a semi-fluid matrix where various cellular processes occur. Lastly, cells utilize ribosomes, molecular machines responsible for protein synthesis, essential for cell growth and function.
These characteristics represent the basic foundation of cellular life, playing a pivotal role in sustaining vital processes, regardless of cell type or complexity.
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Cats have many different cells in their bodies * Cells come from existing cells The cell is the basic unit of life All living things are made up of cells Cells take in and use energy
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Answer:
By the late 1830s, botanist Matthias Schleiden and zoologist Theodor Schwann were studying tissues and proposed the unified cell theory. The unified cell theory states that: all living things are composed of one or more cells; the cell is the basic unit of life; and new cells arise from existing cells.
51. The region of each antibody molecule where amino acid composition is highly varied from one clone of B lymphocytes to another is the
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The region of each antibody molecule where the amino acid composition is highly varied from one clone of B lymphocytes to another is called the hypervariable region or complementarity-determining region (CDR).
The hypervariable regions are also called the complementarity determining regions because they are involved in binding with the antigen, and the variability of amino acid composition is critical for the specificity and diversity of antibodies.
The complementarity-determining regions are formed by a loop structure on the surface of the antibody molecule. There are three CDRs in the variable region of the light chain and heavy chain, designated CDR1, CDR2, and CDR3. These regions interact with the epitope of an antigen.
The interactions of amino acids in these regions lead to the formation of the antigen-binding site. The CDR3 region of the heavy chain is the most variable of the CDRs, with amino acid sequences that can differ greatly between antibodies.
Amino acid composition is highly varied from one clone of B lymphocytes to another in hypervariable or complementarity-determining regions. CDRs are crucial for the specificity and diversity of antibodies.
CDRs are formed by a loop structure on the surface of the antibody molecule, there are three CDRs in the variable region of the light chain and heavy chain. CDR3 is the most variable of the CDRs and interacts with the epitope of an antigen, leading to the formation of the antigen-binding site.
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Name the 2 different types of endoplasmic reticulum and explain the function of each type endoplasmic reticulum to the cell . (ie - what does each one 'produce', or make for the cell)
Answers
Answer:
The surface of the rough endoplasmic reticulum (ER) is covered in ribosomes, while the smooth endoplasmic reticulum is not covered in ribosomes.
Explanation:
Hence their terms, rough and smooth endoplasmic reticulum, the smooth is like a fine tube whereas the rough consists of ribosomes on its surface. Both the smooth and rough endoplasmic reticulum work together, delegate tasks and are the site for production and storage of proteins.
Smooth ER is responsible for storage and lipids production, while the rough ER is responsible for production of proteins and some hormones.
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sean is performing barbell squats with the intent of building up his quadriceps muscles. to make the quadriceps perform more work and increase the efficiency of the exercise, he should:
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To make the quadriceps perform more work and increase the efficiency of the exercise, Sean should minimize the amount of trunk flexion at the start of the concentric phase.
We can describe trunk flexion as forward pelvic tilt and flexion of the spine. This activity causes more pressure on the muscles of your quadriceps and hence helps in building them.
The quadriceps can be described as the muscles that are present in the front region of the thigh. These area has more muscle mass as compared to other areas of your brain and hence need to be worked on so that the muscle mass here can be reduced.
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What is made of many ecosystems with of similar weather patterns and many habitats?
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Answer: The whole surface of Earth is a series of connected ecosystems. Ecosystems are often connected in a larger biome. Biomes are large sections of land, sea, or atmosphere. Forests, ponds, reefs, and tundra are all types of biomes, for example. They're organized very generally, based on the types of plants and animals that live in them. Within each forest, each pond, each reef, or each section of tundra, you'll find many different ecosystems.
Explanation: Hope this helps :)
Plant and animal cells also require cytoskeletal proteins for cytokinesis, although the roles these proteins play differ among bacteria, plants, and animals. True or false?.
Answers
How does the final paragraph relate to the main idea of the article?
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Other sentences within a paragraph relate to the main idea. The final “wrap-up” sentence within a paragraph often reinforces the main idea. The main idea of a passage is important
Answer:
The final paragraph of an article, story, or essay is normally the restatement of the thesis or main idea. I hope this helped! Brainliest is much appreciated!
what is one of the biggest threats to the coral reefs here in the raja ampat archipelago?
Answers
One of the biggest threats to the coral reefs in the Raja Ampat Archipelago is coral bleaching.
What are the biggest threats to coral reefs?The biggest threat to the coral reefs is coral bleaching.
Coral bleaching occurs when corals are subjected to stress factors such as increased water temperatures, pollution, or changes in water chemistry. As a result, the corals expel the symbiotic algae (zooxanthellae) living within their tissues, causing them to lose their vibrant colors and turn pale or white.
In Raja Ampat, rising sea temperatures due to climate change pose a significant risk to coral reefs. When the water temperatures exceed the corals' tolerance thresholds for prolonged periods, it triggers widespread bleaching events.
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what is hamilton's rule? view available hint(s)for part a what is hamilton's rule? a. br > c, meaning altruism occurs when its benefit to a relative times r, the coefficient of relatedness between the relative and the actor, outweighs the costs to the actor b. fr < fa, meaning the fitness of relatives is worth less than the actor's fitness, so altruism should never occur. c. an animal should help (be altruistic to) any infant regardless of whether they are related. d. altruism should only occur in certain species that meet key criteria.
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Hamilton's rule is defined as altruism happens when its advantage to a relative times r, the coefficient of relatedness between the relative and the actor, exceeds the costs to the actor.
What is Hamilton's rule? Hamilton's rule is explained in the following way: If the benefit to a relative times r, the coefficient of relatedness between the relative and the actor, exceeds the costs to the actor, altruism occurs.
Hamilton's rule can be written as: br > c.In this context, 'r' is the coefficient of relatedness between the relative and the actor. Altruism occurs when the advantage to the relative times r exceeds the costs to the actor.
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1.Karyose" comes from a Greek word that means "kernel," and “promeans "before." Based on this information, prokaryotic means– 2.What is the structure of prokaryotic cells?
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Answer:
The Prokaryotic Cell
Prokaryotes are unicellular organisms that lack organelles or other internal membrane-bound structures. Therefore, they do not have a nucleus, but, instead, generally have a single chromosome: a piece of circular, double-stranded DNA located in an area of the cell called the nucleoid
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All of the following factors deal with the RELEASE of carbon dioxide into the atmosphere EXCEPT:
1 Photosynthesis
2 Volcanic Activity
3 Respiration
4 Erosion
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When coding for mRNA, what are the complimentary bases?
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Answer:
DNA is essentially a storage molecule. It contains all of the instructions a cell needs to sustain itself. These instructions are found within genes, which are sections of DNA made up of specific sequences of nucleotides. In order to be implemented, the instructions contained within genes must be expressed, or copied into a form that can be used by cells to produce the proteins needed to support life.
What is your observation in three bean seed experiment?
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The observation which we get from the three bean seed experiment is that for germination to take place, oxygen, water and temperature are necessary in equal proportion.
The purpose of this study is to show that seeds require equal amounts of oxygen, water, and temperature.
A glass slide, a beaker, a thread, and bean seeds make up the apparatus.
Use a glass slide to bind three ripe bean seeds in three distinct places. Place the slide in the water-filled beaker with the top seed above the water, the middle seed at water level, and the third seed submerged in the water.
Observation: Because the top seed receives oxygen but not water, it does not germinate. As it receives both oxygen and water, the center seed begins to sprout. The seeds at the bottom do not germinate, but they do display the appearance of a little radical as a result of a small amount of dissolved oxygen in the water.
Therefore, a seed requires water, oxygen and temperature in equal proportion.
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Blood is a type of ______ tissue composed of an extracellular matrix called plasma surrounding a variety of cells.
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Blood is a type of connective tissue composed of an extracellular matrix called plasma surrounding a variety of cells.
Blood is a type of tissue that plays a vital role in the circulatory system, transporting oxygen, nutrients, hormones, and waste products throughout the body. It is composed of an extracellular fluid called plasma and a variety of cells, including red blood cells (erythrocytes), white blood cells (leukocytes), and platelets (thrombocytes).
Plasma is a yellowish fluid that makes up about 55% of the total volume of blood and contains water, proteins, salts, and dissolved gases. The cells in blood are suspended in the plasma and are essential for maintaining the health of the body.
Red blood cells, or erythrocytes, contain hemoglobin, which binds to oxygen and carries it to the tissues. White blood cells, or leukocytes, play a crucial role in the immune response by attacking and destroying foreign invaders such as bacteria and viruses. Platelets, or thrombocytes, are involved in blood clotting and help prevent excessive bleeding when the body is injured.
Together, the plasma and cells of blood work together to maintain the health and well-being of the body by transporting essential substances, protecting against disease, and regulating fluid balance.
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predict how you think
clouds contribute to the global energy
budget
Click to add text
Answers
Answer:
Mists assume a principal part in keeping up the Earth's energy equilibrium, or "radiation financial plan," the measure of radiation that enters and leaves the Earth.
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Santorini, Greece is a unique island. It was formed by a volcanic explosion
A. True
B. False
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after inoculating your blood agar plate you place it in the incubator. upon taking the plate out of the incubator you observe your bacteria has grown and the back of the plate turned your plate a dark brownish green color. you conclude the hemolytic activity of this organism to be
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Based on the observation of the dark brownish green color on the back of the blood agar plate after incubation, along with bacterial growth, the hemolytic activity of the organism can be inferred to be alpha-hemolytic.
Alpha-hemolysis is a type of hemolytic activity exhibited by certain bacteria where partial destruction of red blood cells occurs. It is characterized by a greenish discoloration of the agar surrounding the bacterial colonies. The green color is the result of the breakdown of hemoglobin in the red blood cells by the bacteria, leading to the release of iron-containing compounds.
In alpha-hemolysis, the bacterial colonies create a zone of incomplete hemolysis around them. This means that the red blood cells are only partially lysed, resulting in a greenish discoloration rather than complete clearing of the agar.
The dark brownish green color observed on the back of the blood agar plate is likely due to the accumulation of the breakdown products of hemoglobin produced by the alpha-hemolytic bacteria.
Therefore, based on these observations, it can be concluded that the hemolytic activity of the organism in question is alpha-hemolytic.
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MULTIPLE CHOICE QUESTION
Which is smallest?
A. Virus
B. Eukaryote cell
C. Prokaryote cell
D. Human
Answers
The smallest option among the choices given is A. Virus.
Explanation:
Virus is an infectious agent that is much smaller than a typical prokaryotic or eukaryotic cell. It is essentially a small package of genetic material (either DNA or RNA) enclosed in a protein coat called a capsid. Some viruses also have an outer envelope made of lipids.
A prokaryotic cell, on the other hand, is a unicellular organism that lacks a nucleus and other membrane-bound organelles. Examples of prokaryotic cells include bacteria and archaea. While they are small, prokaryotic cells are generally larger than viruses.
Eukaryotic cells are more complex than prokaryotic cells, with a true nucleus and various organelles such as mitochondria, endoplasmic reticulum, and Golgi apparatus. Eukaryotic cells are generally larger than prokaryotic cells.
Finally, human beings are multicellular organisms composed of trillions of eukaryotic cells. Therefore, humans are much larger than any individual cell or virus.
Presence of which among the following salts in water causes “Blue Baby Syndrome”?
A.) Sulphates
B.) Chlorides
C.) Carbonates
D.) Nitrates
Answers
Answer:
D
Explanation:
The most common cause of the blue baby syndrome is water contaminated with nitrates. After a baby drinks formula made with nitrate-rich water, the body converts the nitrates into nitrites.
Answer:
d) Nitrates
Explanation:
The most common cause of blue baby syndrome is water contaminated with nitrates.
Which of these is a characteristic of body cells that require large amounts of energy?
answers:
They have a large number of mitochondria.
They have a large number of vacuoles.
They have a small number of chloroplasts.
They have a small number of mitochondria.
Answers
Answer:They have a large number of mitochondria.
This important factor of survival for the coral reef is
Answers
Answer:
sunlight, oxygen and shallow water.
Explanation:
Sunlight: Corals need to grow in shallow water where sunlight can reach them. Corals depend on the zooxanthellae (algae) that grow inside of them for oxygen and other things, and since these algae needs sunlight to survive.