The tongue breaking pieces of a hamburger apart is known as Mechanical Digestion.
This is because of Physical Change that occurs place in the place of the mouth and the spot where the teeth as well as the tongue breakdown food. So in all, it is also seen as Physical Change.
What is Mechanical Digestion?Mechanical digestion, also known as physical digestion, is the process by which food is broken down into smaller pieces through the use of physical means such as chewing, grinding, and crushing.
This process begins in the mouth with the action of the teeth and tongue, which mechanically break down food into smaller particles before it is swallowed and enters the rest of the digestive system.
Therefore, The mechanical breakdown of food increases the surface area of the food particles and makes it easier for enzymes to act on them, which is the chemical digestion process.
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What is the purpose of crossing-over in meiosis?
A.to create mutations in gametes to increase variation
B.to randomly separate homologous chromosome pairs
C.to reduce the number of chromosomes in gametes by one half
D.to create new combinations of DNA on homologous chromosomes
Answer:
A
Explanation:
During prophase I of meiosis, crossing over that occurs between non-sister chromatids of homologous chromosomes pairs occurs at chiasma results in the exchange of genetic material. This produces new genetic combinations in gametes leading to variation.
which ecosystem has the greatest biological diversity and therefore the highest sustainability
Answer:
Tropical rain forests on land and coral reefs in marine systems are among the most biologically diverse ecosystems on Earth and have become the focus of popular attention.
Explanation:
definitely D because a rainforest is extremely vast when it comes to different species
Answer:
Species richness is greatest in tropical ecosystems. Tropical rain forests on land and coral reefs in marine systems are among the most biologically diverse ecosystems on Earth and have become the focus of popular attention.
mportant vocabulary continued:what is the difference between a unicellular organism and a multicellular organism?
Answer:
Unicellular organisms are made up of only one cell that carries out all of the functions needed by the organism, while multicellular organisms use many different cells to function. ... Multicellular organisms are composed of more than one cell, with groups of cells differentiating to take on specialized functions.
Explanation:
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Only a few natural elements have a greater density than gold. They are: ??
15 POINTS AND BRAINLIEST FOR CORRECT ANSWERS!!!
Plutonium
Neptunium
osmium
let me know if it's correct or not, these were the only ones I could think of.
Few natural elements have a greater density than gold are plutonium, neptunium, and osmium.
What is an element?
An element is define as a type of substance that is impossible to break into smaller pieces by the help of chemical process. There are several rules that should be followed at the time of assinging name of the elements. The first rule is name of the element is not a proper noun. The second rule is the symbols of the element that must be of one or more than one symbol.
Density is define as the mass per unit volume it means that 1 kg mass present in 1 meter cube is called density, density is also states that the how compact an material.
Mathematically
Density = mass/volume
S.I unit of density is kg/m^3
Density is higher in solid as compare to liquid and density of liquid is higher than gas so density is in order of SOLID>LIQUID>GAS. So we know that solid is compact in nature as compare to liquid and gas.
Therefore, Few natural elements have a greater density than gold are plutonium, neptunium, and osmium.
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Most leopards are golden in color with large, circular black spots to provide camouflage. There is one gene that controls the amount of pigments produced by a cell in order to create that color. A mutation on that gene can have any of the following effects. Which is the most likely result of a mutation if the leopard lives in a dense forest?
a white leopard, with albinism
a normal colored leopard
a black leopard, with melanism
no leopard, it would not survive the mutation
Describe how new hair fibers are formed
Answer:
Taking nutrients from the dermal papilla, the hair bulb generates new hair cells. As these cells move up through the hair root, they mature through a process called keratinization, fill with fibrous protein and lose their nucleus.
Explanation:
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What epigenetic marker changes cause chromatin to open up?
Answer Several lifestyle factors have been identified that might modify epigenetic patterns, such as diet, obesity, physical activity, tobacco smoking, alcohol consumption, environmental pollutants, psychological stress, and working on night shifts.:changes to the histone tails act indirectly on the DNA. For example, lysine acetylation may create a binding site for chromatin-modifying enzymes (or transcription machinery as well). This chromatin remodeler can then cause changes to the state of the chromatin. hope this helps ❤️❤️❤️
Explanation:
The changes with respect to the epigenetic marker should result to the chromatin at the time of opening up because When transcription factors could access the DNA binding sites.
Reasons of chromatin:It is the material that comprises of the chromosome that involved the DNA and protein. The major protein is called as the histones. It should be acted as the packaging elements with respect to the DNA.
Therefore, The changes with respect to the epigenetic marker should result to the chromatin at the time of opening up because When transcription factors could access the DNA binding sites and the gene expression is not be blocked.
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the epicenter of an earthquake is:
A. along a fault
B. the same as the focus
C. directly above the focus
D. directly below the focus
Answer:
I'm positive its C :)
Explanation:
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The childhood viral disease associated with skin blisters and mild fever is _____.
polio
rubella
mumps
chicken pox
hope someone can help me
i think it's the independent variable
Answer:
I think it would be A or E? possibly, im not so sure ;v;
The sugars of a DNA and RNA molecule are alternated with in the backbone of the strand
Answer:
A phosphate backbone is the portion of the DNA double helix that provides structural support to the molecule. DNA consists of two strands that wind around each other like a twisted ladder. Each strand has a backbone made of alternating sugar (deoxyribose) and phosphate groups. Attached to each sugar is one of four bases--adenine (A), cytosine (C), guanine (G), or thymine (T). The two strands are held together by bonds between the bases, with adenine forming a base pair with thymine, and cytosine forming a base pair with guanine.
When we talk about soil depletion, which soil horizon are we talking about? Thank you
Answer:
Surface Horizon (A)
Nutrient depletion of soils is a widespread soil degradation phenomenon that occurs as a consequence of soil erosion (it is the topsoil in which generally most soil nutrients are present that erodes fastest) but also because of poor management practices, such as slash and burn and other subsistence agricultural.
35 POINTS !!!! Part A
An organism’s adaptations are specific to its native environment. An organism that lives in a coniferous forest will have different adaptations compared to an animal that lives in a tropical rain forest. The following graphs show the temperature and precipitation throughout the year for two different forests: a coniferous forest in Canada, and a tropical rain forest in Belize.
Evaluate the graphs, and then explain why plants from these two ecosystems will have different adaptations. In your answer, explain the survival challenges that plants face in these two environments.
Coniferous Forest
graphical representations of the temperature and precipitation in a coniferous forest from January to December
Tropical Rain Forest
a graphical representation of the temperature (top image) and precipitation (bottom image) in a tropical rain forest from January to December
Answer:
Ok so one graph shows the temperature it’s in the negative so the plant can’t survive all you have to say is the plant is struggling in the coniferous forest because of the climate there is not enough sun and not enough water the graph next to it shows the amount of water it’s getting and horizontally it’s showing the months and the plants progress the plant is barley surviving and will most likely die vs in the tropical rainforest as you can see the temperature is sunny all throughout the year it’s getting the warmth it needs and the graph next to it is again showing the amount of water it is receiving at first there’s not a lot but pushing more into spring and summer time going farther into colder whether there a lot more rain and because it’s a tropical forest the rain doesn’t turn into snow due with the warm climate it’s the perfect weather for the plant and it easily adapts to this weather because that is the natural environment plants need to grow no matter the plant they all need sun and water I hope that helped this is supposed to be a written out answer you can put it in your own words if you like or use it that way but I just did it and I got a 90% on the grade
what's mitosis and meiosis?
Answer:
MITOSIS AND MEIOSIS*Most of the time when people refer to “cell division,” they mean mitosis, the process of making new body cells. Meiosis is the type of cell division that creates egg and sperm cells. ... During mitosis, a cell duplicates all of its contents, including its chromosomes, and splits to form two identical daughter cells.
What meiosis means?Meiosis is a type of cell division that reduces the number of chromosomes in the parent cell by half and produces four gamete cells. This process is required to produce egg and sperm cells for sexual reproduction. ... Meiosis begins with a parent cell that is diploid, meaning it has two copies of each chromosome.
What is mitosis explain?Mitosis is a process where a single cell divides into two identical daughter cells (cell division). During mitosis one cell? divides once to form two identical cells. The major purpose of mitosis is for growth and to replace worn out cells.
What is meiosis important?Meiosis is important because it ensures that all organisms produced via sexual reproduction contain the correct number of chromosomes. Meiosis also produces genetic variation by way of the process of recombination.
What is Mitosis important?Mitosis is a way of making more cells that are genetically the same as the parent cell. It plays an important part in the development of embryos, and it is important for the growth and development of our bodies as well. Mitosis produces new cells, and replaces cells that are old, lost or damaged.
What is Mitosis means?Mitosis is a process where a single cell divides into two identical daughter cells (cell division). ... The major purpose of mitosis is for growth and to replace worn out cells.
What Meiosis explain?Meiosis is a type of cell division that reduces the number of chromosomes in the parent cell by half and produces four gamete cells. This process is required to produce egg and sperm cells for sexual reproduction. ... Meiosis begins following one round of DNA replication in cells in the male or female sex organs.
Explanation:
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A teacher uses the diagram below to help him explain hereditary to a group of students. which of these combinations identifies the appropriate labels in the order as shown in the diagram (1, 2, 3)
a.)chromosome, DNA, gene
b.)chromosome, gene, DNA
c.) DNA, chromosome, gene
d.) DNA, gene, chromosome
Answer:
The answer is b
Explanation:
pls help and only answer if you can please
Answer:
A
Explanation:
I got this by process of elimination because I know all those other answers are wrong
A large group of seals from Prince Harold Coast Antarctica has emigrated to Oates Coast Antarctica How will this impact the remaining seal population Prince Hard Coast
A The Prince Harold population will decrease
B. The Prince Harold population will increase
C The Prince Harold population will be reduced to zero
DThis will have no impact on the Prince Harold population
Answer:
B
Explanation:
Because now it’s a larger group
A stop enzyme is used in protein synthesis to stop tRNA from carrying messages from the DNA to the ribosome.
True
False
How would Earth be different without the greenhouse effect?(1 point)
A.There would be more solar energy reaching Earth.
B.The atmosphere would contain more methane.
C.The oceans would contain more carbonic acid.
D.There would be more ice on Earth's surface.
Answer:
I think the answer will be:
D. There would be more ice on Earth's surface.
Explanation:
Without the greenhouse effect, the Earth would have an average temperature of -18°c and life would not be able to survive.
The Earth would be different if the greenhouse gasses didn't even exist.
The Earth's surface would be covered in more ice.
So, option D. is correct.
Define greenhouse effect.The greenhouse effect happens when solar energy passes through a planetary system and heats its surface, but the air prevents the energy from going directly to space, leading in a warming climate.
The Earth would be different if the greenhouse gasses didn't even exist.
The Earth's surface would be covered in more ice. So, option D. is correct.
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Construct an argumentative paragraph. Do you believe it's ethical or unethical to artificially select traits in plants and or animals? Provide evidenco to suoport your claims. It doesn't matter what side you chose, but I need it asap.I will give you any mark you want.
Answer:
The ethics of artificially inserting traits in animals has been in the practice for years in the form of selective breeding, but should scientists really be editing DNA to the extent they are today? I don't believe they should. Life itself should construct itself without us interfering. Making a brand new plant just because it looks nice doesn't account for many factors, including the fact that it could be harmful to nearby plants if pollinated. In addition, generic engineering costs quite a lot of money, which should be used on other more cost effective methods, such as improving agriculture rather than creating a whole new plant that could harm entire crops. Genetic engineering isn't a necessity and humans should not play God with plant and animal life.
1. Submit your observations of the chicken leg dissection.
2. Were you able to determine how the chicken moves?
3. What characteristics of muscles help you determine the direction of the movement?
Answer:
1. Submit your observations of the chicken leg dissection.
The first thing that I saw was the skin. This one has bumps on it. Underneath, when I carefully cut it, I could see a yellow layer which is fat. Under the fat, there is a thick pink tissue, the muscles. The muscle is in contact with the bones and attached to them by the tendons. They look thin and white and are at the muscles' ends since they attach them to the bones.
2. Were you able to determine how the chicken moves?
Yes, muscles work in pairs, so when I pull from a specific tendon, the leg bends since the muscle contracts to do this movement. Then this muscle will relax, another muscle will contract itself, and a tendon will pull the bone to return the leg to a straight position.
When one of these muscles contracts, the other relaxes to allow the bone's movement in a specific direction. Then this muscle relaxes and allows the leg's movement in the opposite direction since the muscle that was lax before now is contracting itself to extend the leg. There are a flexor and an extensor muscle.
3. What characteristics of muscles help you determine the direction of the movement?
The characteristics that help me determine the movement's direction were:
The position that the muscles have concerning the joints and the bones. The tendons at the end of the muscles and bones.By following the muscle, the tendon, and where it is in the joint, I could determine the movement's direction.
Explanation:
When we observe a chicken leg dissection, we can determine the components that it has and how all the elements work together to move the leg. Even though the mechanism and structure are not the same as in a human body, we can see how muscles, bones, tendons, and joints work not only in animals but also in humans to allow movement.
Suggest a way that each farm could change their farming practices to prevent pollution of the river with nitrates. Gizmo
Answer:
An improved agricultural practices such as adjustment of application rate, application of the right amount of nitrogen, use of slow controlled release fertiliser, applying nitrogen fertilisers when least susceptible to loss, crop rotation
Explanation:
The various ways are available to reduce or prevent pollution of the river with nitrates, the most effective is:- reducing or not use of artificial or industrial-based nitrogen fertilizers and using biofertilizers.
Agriculture or farming contributes to water pollution when using fertilizers more than the required amount or easily lost fertilizers. This increases the of nutrients including nitrates in the river that cause the growth of algal bloom and eutrophication.
There are several ways to control the nitrates in the river:
adjustment of using rateapplication of the right amount of nitrogenslow-release fertilizernitrogen fertilizers when least susceptible to losscrop-rotation and use of legumesavoiding over-irrigationThus, the correct answer is: reducing or not using artificial or industrial-based nitrogen fertilizers and using biofertilizers.
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Which feature of chytrids makes them different from the other types of fungi? the material that strengthens their cell walls the special digestive material they release their use of budding to reproduce their ability to live in dry environments
Answer:
the material that strengthens their cell walls
Explanation:
Chytrids originate from the kingdom fungi and a division known as Chytridiomycota. They contain a feature of unique characteristics by the presence of the chitin and the cellulose cell wall. The chitin made up the component of their cell wall in fungi but in Chytrids, the cellulose helps to strengthens their cell walls.
Answer:
A. the material that strengthens their cell walls
the pencil and the book both fall down at the same time because
Answer:
They both weighed tha same
Explanation:
A book is heavier than a pencil, but if they are equal in weight. Then they will fall at the same time
Hope this helped
what does dna have a high concentration of
Answer:
Nucleotides
Explanation:
DNA is made of chemical building blocks called nucleotides. These building blocks are made of three parts: a phosphate group, a sugar group and one of four types of nitrogen bases. To form a strand of DNA, nucleotides are linked into chains, with the phosphate and sugar groups alternating
Explain the statement “all cells perform respiration but not all perform photosynthesis”.
All cells perform respiration but not all perform photosynthesis because of the absence of the plastids.
Respiration:
It is a process by which organisms produce energy by degrading glucose.
It is occur in mitochondria in eukaryotes and in plasma membrane in prokaryotes.
Photosynthesis-
It is a process by which photoautotrophic organisms produce glucose from the Carbon dioxide and water by capturing the sunlight using chlorophyll.
Chlorophyll is found in the plastid of plants and algae.
Therefore, all cells perform respiration but not all perform photosynthesis because of the absence of the plastids.
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The Sun appears to move across the sky each day. What causes this?
Answer:
The earth is turning.
Explanation:
when the earth turns it causes the sun to move from one part of the sky to the other. The earth revolves around the sun. So when it become night time for example, the sun is just on the other side of the earth.
how do organisms with many cell types develop from a single cell
Cell division, torso axis formation, tissue and organ development are all part of development, and cell differentiation refers to acquiring a final cell type identity.
What is cell division?The process by which a parent cell divides into two daughter cells is known as cell division.
Cell division is usually part of a larger cell cycle during which the cell grows and replicates its chromosomes before dividing.
Cell division occurs in two stages: mitosis and meiosis. When most people say "cell division," they're referring to mitosis, the process of creating new body cells.
Meiosis is the process by which egg and sperm cells are formed. Mitosis is a necessary process for life.
Multicellular organisms form in a variety of ways, including cell division and the aggregation of many single cells. Colonial organisms form when many identical individuals band together to form a colony.
Thus, this way, organisms with many cell types develop from a single cell.
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The eyespot of a euglena is damaged. How will this affect the organism's basic functions?
A The euglena will lose its flexibility
B. The euglena will be unable to reproduce.
C. The rate of photosynthesis in the euglena will be reduced.
D. The ability of the euglena to move away from light will be reduced.
_____ allows the cell to grow larger and replicate its DNA in order to prepare for cell division, known as _________. The __________ is the cell that divides to become two new _________.
Answer:
_Mitosis_ allows the cell to grow larger and replicate its DNA in order to prepare for cell division, known as __meiosis__. The __parent cell_ is the cell that divides to become two new _daughter cells__.
Explanation:
The excerpt explains cell division. Let us define some of the terms used:
Mitosis: Mitosis is a stage in the cell cycle where a parent cell divides/replicates into two identical daughter cells. They are identical because they contain the same number of genetic information after division. Mitosis is responsible for cell growth in all somatic cells
Meiosis: Meiosis is a type of cell division in germ (reproductive) cells where the parent cell divides into two daughter cells which contain half the number of genetic information (haploid) as the parent cell.
Parent cell: This refers to the original cell that undergoes division into two or more daughter cells
Daughter cells: The daughter cells are the resulting cells produced after cell division.
For a better understanding of the whole cell division cycle, please read-up the stages contained in both the mitosis and meiosis.