The esophageal sphincter closes after a bolus has been swallowed and enters the stomach.
What is the esophageal sphincter?The esophageal sphincter is a sphincter that separates the esophagus from the stomach. The muscle attached thereto pushes the bolus down the stomach.
Hence, esophageal sphincter closes after a bolus has been swallowed and enters the stomach. This sphincter is essential to prevent the contents of the stomach reentering the esophagus.
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1.) You lie deep in the Earth's crust.
2.) You slowly melt from the heat of the earth's mantle,
3.) You erupt out of a volcano as liquid rock (lava) and harden in the cool
air.
What rock do you change into?
There are three types of rocks according to how they get formed. Igneous rocks come from the Earth's interior as lava and erupt out of a volcano, getting cold and solidifying when get in touch with air.
Types of rocks
According to how they get formed, we can mention three different main types of rocks,
MetamorphicIgneousSedimentaryIgneous Rocks
These rocks come straight from the interior of the Earth.
A liquid mass of silicate composition coming from the Earth's core erupts out of a volcano as lava.
Since this melted mass comes from the Earth's interior, its temperature is extremely high.
Lava begins to cool and solidify during its ascent to the Earth's surface.
Igneous rocks are produced by the cooling of magma when they get in touch with air.
Thre are two types of igneous rocks
plutonic rocks ⇒ in areas close to the terrestrial crustvolcanic rocks ⇒ on the surfaceYou can learn more about igneous rocks at
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A scientist is performing an investigation using biochemistry. She compares the protein sequence of an unknown species to the protein sequences of four known species. Her data is shown in the table.
The scientist claims that all living organisms are related by way of common descent. The comparison of which two species BEST supports her claim?
species I and species III
species II and species IV
the unknown species and species IV
the unknown species and species II
Based on the similarity in protein sequence, the most closely related species are unknown species and species IV.
Which species are related by way of common descent?From the data provided:
Unknown species: ACT GCA CCCSpecies I: ACA GCA CCG Species II: ACT GGT GGASpecies III: ACA GCA GGGSpecies IV: ACT GCA CCGBased on the similarity in protein sequence, the most closely related species are unknown species amd species IV.
Therefore, the most closely related species are unknown species and species IV.
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Answer:
the unknown species and species IV
Explanation:
I took the practice test
What letter represents a trench?
a. A
b. B
c. C
d. D
e. E
explain what happens to the mRNA strand if a mutation occurs in the DNA strand
Answer:
Consequently, once it encounters the mutation, the ribosome will read the mRNA sequence differently, which can result in the production of an entirely different sequence of amino acids in the growing polypeptide chain.
Answer thank u…………………..
Answer:
130
Explanation:
The main cellular structure that regulates the movement of materials into and out of the cell is the
Help with the image please? Appreciate it!
Answer:
the first one is catalytic converter
the second is building and maintaining a safe reactor is very inexpensive
Explanation:
I resarched my answers and they were correct
Which statement best explains why multicellular organisms have specialized cells?
O They must undergo cellular respiration to get energy needed to move and grow.
O They must replace dead cells with new ones.
O They must undergo photosynthesis to obtain energy needed for cellular respiration.
O They are made of cells that form tissues and organs that perform specialized functions.
Answer:
I think your answer would be D.
Explanation:
The tissues are not specialized. The organelles do not cooperate in order to perform the functions of living things. The majority of its cells do not come into contact with the outside world.
Multicellular organisms means the the organisms composed of more than one cells. These cells will differentiate to perform specialized functions.
Why multicellular organisms have specialized cells?According to level of organization, cell combine to form tissue, tissue group together to form organs, organs combine to form organ system and organ system work in coordination to form organism.
In multicellular organisms, each group of cells perform specialized functions.
Thus, option D is correct, i.e., they are made of cells that form tissues and organs that perform specialized function.
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10) In a population of dogs, curly hair is dominant over straight hair. If two parents are heterozygous for this trait, what is the probability that any of their offspring will have straight hair
The probability would be 1/4 or 25%
Monohybrid crossingAssuming that curly hair is represented by A and straight hair by a.
Crossing two heterozygous parents:
Aa x Aa
AA Aa Aa aa
Offspring:
AA - curly hair
Aa - curly hair
aa - straight hair
Probability of curly hair = 3/4
Probability of straight hair = 1/4
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Cholesterol is an important component of the cell membrane because *
A-It makes the membrane less fluid, stabilizing the membrane
B-It aids in diffusion
C-It aids in cell recognition
D-It transports large, polar molecules
Answer:
Option A... Because cholesterol prevents membrane from freezing and maintain membrane fluidity
Which reagent is used to detect the presence of simple sugars?.
We have that the the Benedict's reagent is used to detect the presence of simple sugars
MoleculesGenerally the test for sugar is detected by the turn from turquoise to yellow or orange when i contact with carbohydrates
This is the Benedict's reagent
Therefore
The Benedict's reagent is used to detect the presence of simple sugars
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How could sedimentary rock become igneous rock? List the steps.
Answer:
Sedimentary rock can become igneous rock by melting and solidification.
Explanation:
sorry if this doesn't help its the best i can do
What enzyme is needed to convert testosterone to dihydrotestosterone?.
Answer:
5-alpha reductase
Explanation:
The 5 alpha-reductase enzyme acts on these target tissues to convert testosterone to DHT. DHT is largely a paracrine hormone because of this isolated synthesis at a particular target tissue. It is mostly produced in the liver, therefore the systemic circulation only contains modest levels of it.
What role of 5-alpha reductase enzyme?The enzyme 5 alpha-reductase converts testosterone to DHT. The need for 5 -reductase differs with different tissues, as demonstrated by the autosomal recessive genetic condition 5 -reductase deficiency.
By acting on certain target tissues, the 5 alpha-reductase enzyme transforms testosterone to DHT. DHT is largely a paracrine hormone due to this isolated synthesis at a specific target tissue. Only trace levels are seen in the systemic circulation because it is primarily synthesized in the liver.
Therefore, 5-alpha reductase enzyme is needed to convert testosterone to dihydrotestosterone.
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How does antibiotics stop bacterial cell wall formation?.
Answer: Glycopeptide antibiotics inhibit the synthesis of cell walls in susceptible microbes by inhibiting peptidoglycan synthesis.
Explanation:
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What is aerobic cellular respiration? Explain the term aerobic, describe the overall goals of aerobic respiration, and list the three main parts or cycles in this process.
Explanation:
It is the process of cellular respiration that takes place in the presence of oxygen gas to produce energy from food. The term aerobic means oxygen. Its goal is to derive energy from macromolecules such as carbohydrates, proteins and fats to carry out various energy-requiring processes.
The three main parts or cycles in this process are Glycolysis, Citric acid cycle and Electron transport chain.
Hope this answer helps you dear!
In which stage of the cell cycle does the cell duplicate its dna?.
which of the following type of telescopes could be on the ground?
- gamma
- infrared
- radio
- x- ray
Answer:
x-rays
Explanation:
directions: identify whether it is biotic or abiotic by writing your answer before the number
1. algae
2. dissolve oxygen
3. amphibian
4. temperature
5. fish
6. changing weather
7. phytoplankton
8. trees
9. birds
10. rain
11. insects
12. fertile soil
Which organism has the least differences in the number of amino acids in cytochrome c compared to
humans? Which organism has the greatest difference?
Answer:
Using the number of amino acid differences, it would appear that the two birds are more closely related (had a common ancestor very recently), while the two fungi would have to trace their common ancestry much farther back in time (much more distantly related).
Proteins to be secreted outside the cell are formed at ribosomes on the surface of the ______ endoplasmic reticulum.
Answer:
Proteins to be secreted outside the cell are formed at ribosomes on the surface of the rough endoplasmic reticulum.
Proteins to be secreted outside the cell are formed at ribosomes on the surface of the rough endoplasmic reticulum.
How protein is synthesized?Ribosomes, which are tiny, elongated organelles with a round shape, are found on the rough endoplasmic reticulum and are responsible for producing those proteins.
After prolonged chase times, secretory vesicles carrying the radiolabeled proteins from the Golgi apparatus to the cell surface merged with the plasma membrane to discharge their contents outside of the cell.
While the smooth endoplasmic reticulum does not contain ribosomes and produces lipids and helps the cell detoxify, the rough endoplasmic reticulum produces protein and contains ribosomes.
Therefore, the rough endoplasmic reticulum is responsible to synthesize proteins to be secreted outside the cell.
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In the heart, an action potential originates in the __________.
Answer:
sinoatrial (SA) node
What is the relationship between the degree of crossing over and the distance between two genes?.
Answer: It is direct; as the distance between linked gene increases, the frequency of recombination increases.
Answer: Direct. The distance is increasing.
What did gregor mendel use to discover the principles that rule heredity?.
Gregor Mendel, through his work on pea plants, discovered the fundamental laws of inheritance. He deduced that genes come in pairs and are inherited as distinct units, one from each parent. Mendel tracked the segregation of parental genes and their appearance in the offspring as dominant or recessive traits.
Cuestions
Explain why you needed to use a water plant for collecting the gas produced in photosynthesis
the conversion of unusable sunlight energy into usable chemical energy,is associated with the actions of the green pigment chlorophyll. most of the time, the photosynthetic process ises water and releases the oxygen that we absolutely must have to stay alive
When does nature provide the
variation and humans select the
favorable traits and breed
individuals that show those
traits?
A. inherited variation
B. natural selection
C. artificial selection
D. fitness
Answer:
b i may be wronggg???? but im pretty sure i remeber a il about this
Explanation:
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1. During photosynthesis, what happens to the energy in sunlight?
2. Sun energy is converted into ______ energy called ______.
What do organs, tissue, and organ systems have in common?
Answer:
The body has levels of organization that build on each other. Cells make up tissues, tissues make up organs, and organs make up organ systems. The function of an organ system depends on the integrated activity of its organs. For instance, digestive system organs cooperate to process food.
Cell respiration is aerobic because it requires light.
True
False
Answer:
False
Explanation:
An aerobic activity requires oxygen
Explain why an organism with a similar volume but more spherical in shape would not be as efficient as a flatworm at exchanging substances with their environment.
Answer:
As the ratio gets smaller, it takes longer for items to diffuse.
Explanation:
When the cell increases in size, the volume increases faster than the surface area, because volume is cubed where surface area is squared.
When there is more volume and less surface area, diffusion takes longer and is less effective. This is because there is a greater area that needs to receive the substance being diffused, but less area for that substance to actually enter the cell.
this is actually why cells divide. When they become too large and it takes too long for them to transport materials across the cell, they lose efficiency and divide in half to raise the surface area to volume ratio.
Variation in carbon chains is an important source of molecular complexity. How can carbon skeletons vary?.
Answer:Covalent bonds link carbon atoms together in long chains that form the skeletal framework for organic molecules. These carbon skeletons may vary in: ... Compounds with the same molecular formula but with different structures and hence different properties. Isomers are a source of variation among organic molecules.
Explanation:
The carbon skeletons may vary in:
lengthShapeNumber and location of double bondWhat is carbon skeletons?The term carbon skeleton is utilized to depict the example where the carbon iotas are reinforced together in a particle, ignoring molecules of different components and contrasts among single and numerous bonds.
Most substance responses of natural mixtures don't break connections between carbon iotas and thusly leave the carbon skeleton unaltered. In numerous isoprenoids, rings of three, four, or five carbon iotas structure part of the atomic design.
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