Which of the following statements best describe why the mucous membrane on the inner lining of the
esophagus is considered a tissue? Choose 2 answers:
The epithelial cells of the mucous membrane work together to keep the esophagus moist.
The mucous membrane is made up of epithelial cells, which are a type of specialized cell.
Mucous membranes are the only component of a larger organ system.
Answers
The statements that best describe why the mucous membrane on the inner lining of the esophagus is considered a tissue are:
The epithelial cells of the mucous membrane work together to keep the esophagus moist.The mucous membrane is made up of epithelial cells, which are a type of specialized cell.TISSUES:A tissue is described as an organization of cells, which are working closely together to perform a function. Several cells come together to make up a tissue.
According to this question, the mucous membrane on the inner lining of the
esophagus is regarded as a tissue. The following are best reasons the mucous membrane is considered a tissue:
The epithelial cells (form epithelial tissue) of the mucous membrane work together to keep the esophagus moist.The mucous membrane is made up of epithelial cells, which are a type of specialized cell.Learn more about tissues at: https://brainly.com/question/17664886?referrer=searchResults
Related Questions
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Explain (in details), starting with the motor neuron, how muscle contraction occur. List all the molecules involved in this
process.
Answers
Muscle contraction is a complex process that involves the interaction of various molecules. It starts with the motor neuron, which carries the signal from the brain or spinal cord to the muscle. The signal, known as an action potential, travels down the motor neuron and reaches the neuromuscular junction, where the motor neuron and muscle fiber meet.
At the neuromuscular junction, the action potential triggers the release of a neurotransmitter called acetylcholine (ACh) from the motor neuron. ACh then binds to receptors on the muscle fiber's membrane, causing it to depolarize. This depolarization propagates along the muscle fiber's membrane and into the deeper regions of the muscle fiber through a network of tubules called the transverse tubules (T-tubules).
The depolarization of the T-tubules activates another set of tubules called the sarcoplasmic reticulum (SR), which is a specialized structure within the muscle fiber. The SR releases calcium ions (Ca2+) into the muscle fiber's cytoplasm. The increase in Ca2+ concentration in the cytoplasm triggers a series of events that lead to muscle contraction.
The rise in Ca2+ concentration allows the Ca2+ ions to bind to a protein called troponin, which is part of the thin filaments in the muscle fibers. The binding of Ca2+ to troponin causes a conformational change in the troponin-tropomyosin complex, exposing the active sites on the actin filaments.
Next, another protein called myosin, which is part of the thick filaments, binds to the exposed active sites on actin, forming cross-bridges. This binding triggers the release of energy stored in the myosin molecule, causing the myosin heads to change their shape and pull the actin filaments towards the center of the sarcomere (the basic unit of muscle contraction).
ATP, adenosine triphosphate, is the molecule that provides the energy for this process. When ATP is hydrolyzed to ADP and inorganic phosphate (Pi), the energy released is used by the myosin heads to move and generate force.
The cycle of myosin binding to actin, pulling the actin, and then detaching and resetting is repeated as long as Ca2+ is present and ATP is available. When the action potential ceases and Ca2+ is pumped back into the SR, the troponin-tropomyosin complex blocks the active sites on actin, and the muscle relaxes.
In summary, muscle contraction involves a series of events starting with the motor neuron, where the action potential triggers the release of ACh. This leads to depolarization of the muscle fiber, activation of the SR, release of Ca2+, binding of Ca2+ to troponin, exposure of the active sites on actin, and the formation of cross-bridges between myosin and actin. The hydrolysis of ATP provides the energy for the myosin heads to generate force and pull the actin filaments, resulting in muscle contraction.
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Molecules move from the ___ end to the ___ end of the agarose gel when electricity it applied.
Part A ^
\\ PLEASE HELP FILL IN THE BLANKS//
agarose gel is used in electrophoresis. Molecules that are small move ___ than large molecules
part B ^
Answers
DNA molecules move from negative to positive ends.
How can DNA molecules move in the agarose gel electrophoresis?Gel electrophoresis is a laboratory method used to separate mixtures of DNA, RNA, or proteins according to molecular size. In gel electrophoresis, the molecules to be separated are pushed by an electrical field through a gel that contains small pores.
STEP 1: Prepare the samples.
STEP 2: Prepare the gel and buffer.
STEP 3: Load samples.
STEP 4: Electrophoresis (Running the gel)
STEP 5: Visualize and document bands.
So, molecules move away from negative to positive ends.
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How are scientists sure that it is human activity and not solar activity that is currently causing climate change? Explain your answer in 3-5 sentences.
Answers
Life on Earth depends on energy coming from the Sun. About half the light energy reaching Earth's atmosphere passes through the air and clouds to the surface, where it is absorbed and radiated in the form of infrared heat. About 90% of this heat is then absorbed by greenhouse gases and re-radiated, slowing heat loss to space. Over the last century, burning of fossil fuels like coal and oil has increased the concentration of atmospheric carbon dioxide (CO2). This increase happens because the coal or oil burning process combines carbon with oxygen in the air to make CO2. To a lesser extent, clearing of land for agriculture, industry, and other human activities has increased concentrations of greenhouse gases.
Question 1- Name 2 ways that humans affect land ecosystems.
Answers
Bacteriophage replication differs from animal virus replication because only bacteriophage replication involves : __________
a. attachment to specific receptors.
b. assembly of viral components.
c. replication of viral nucleic acid.
d. injection of naked nucleic acid into the host cell.
Answers
As part of an exam, you are given a powder to analyze. When you perform various tests, youfind that it contains a single chemical that changes the pH of neutral water to a pH of 13. Youwould conclude that the chemical is aa. weak acid.b. neutral.c. weak base.d. strong acid.e. strong base.
Answers
To answer this we need to remember the pH scale, as lower is the numbe the compound is more acid, mmeanwhile, if the number ishigher wweare talking of a base, it ranges from 10to 14, being l0 the most acid, 7 neutral and 14 strongest base. Also, we must not forget that the pH scale is on a logarithmic scale (base 10) which means that each level is 10 timeshhigherthatn the previous level, so if we have a 13 pH level we are talking of a very strong base, therefore, the correct answer is option e.
breathing in physical phenomenon. what movement does happen when a person breathe in?
Answers
When a person breathes in, the diaphragm contracts and the lungs expand, creating a vacuum that draws air into the lungs. The air is then circulated through the lungs, where oxygen is absorbed and carbon dioxide is released.
What should know about the body parts that functions when you breath-in?The diaphragm is a vital muscle in inhaling (breath-in) and exhaling, separates the chest cavity from the abdominal cavity.
When the diaphragm contracts, it flattens and moves down. This increases the space in the chest cavity, which causes the lungs to expand. The lungs are elastic, so they expand when the space around them increases.
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What body parts of the giraffe help it to
move? How does that body part help the giraffe survive in nature?
Answers
Answer:
uhhhhhbh legs 0_0 and head
Answer:
They have long legs as well as necks, and the unique way they run -- both legs on each side leave the ground at the same time -- gives giraffes an impressively long stride, allowing them to cover long distances quickly and without expending much energy.
Explanation:
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Answers
How can natural selection and genetic drift impact the evolution of a species?
Answers
Answer:
Both natural selection and genetic drift can impact the evolution of a species in different ways. Here are some examples:
Natural selection can cause the evolution of new adaptations that improve the fitness of a population. For example, if a population of birds lives in an environment with two types of seeds, birds with larger beaks may be better able to crack open the larger seeds and have a higher chance of survival and reproduction. Over time, the frequency of the larger beak trait may increase in the population, leading to the evolution of a new adaptation.
Genetic drift can cause the loss of genetic diversity within a population, which can reduce the ability of a population to adapt to changing environmental conditions. For example, if a population of insects experiences a severe reduction in population size due to a natural disaster, certain alleles may be lost from the population due to chance events. This can reduce the genetic diversity of the population and make it more vulnerable to environmental changes in the future.
Explanation:
The female emperor penguin lays an egg and gives it to the male to keep warm on his feet in his pouch.
Answers
Answer: well yes male emperor penguins tend to take care of the egg while the female hunts
Explanation:
A scientist is designing an investigation to study the impact of fungal disease on the population of mountain yellow-legged frog in a recreational nature park. What is most likely the outcome variable (dependent variable) for the study?
Frog population
Fish population
Disease-controlled habitat
Native habitat in natural setting
Answers
Dependent variable for the study will be Frog population .
A dependent variable is the variable that changes as a result of the independent variable manipulation. Dependent variables are also called as response variables.
A dependent variable is what you measure in the experiment and what is affected during the experiment. The dependent variable responds to the independent variable. It is called dependent because it "depends" on the independent variable. The independent variable in a research study or experiment is what the researcher is changing in the study or experiment. It is the variable that is being manipulated.
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Please help I’m in the middle of a test!
If the original DNA strand is ACTA, and the mutated strand of DNA is ATA, what type of point mutation occurred? Blank 1
If the original DNA strand is ATTA, and the mutated strand of DNA is AGTA, what type of point mutation occurred? Blank 2
If the original DNA strand is AGCG, and the mutated strand of DNA is AGTCG, what type of point mutation occurred? Blank 3
Answers
Blank 1: A substitution mutation occurred where the nucleotide C was replaced by nucleotide T.
Blank 2: A substitution mutation occurred where the nucleotide T was replaced by nucleotide G.
Blank 3: An insertion mutation occurred where the nucleotide T was added to the original sequence AGCG.
Blank 1: The point mutation that occurred is a substitution mutation, specifically a transition mutation where a purine was replaced by another purine. This resulted in the change from ACTA to ATA.
Blank 2: The point mutation that occurred is a substitution mutation, specifically a transversion mutation where a purine was replaced by a pyrimidine. This resulted in the change from ATTA to AGTA. r
Blank 3: The point mutation that occurred is an insertion mutation where a nucleotide T was added to the original sequence AGCG, resulting in AGTCG. This type of mutation can cause a frameshift mutation if the codons are shifted, leading to changes in the resulting amino acid sequence.
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Which describes the Coriolis effect?
Answers
1.How does Nitrogen cycle through the enviroment?
2. Trace the steps that carbon cycles from plants,animal,and enviorment?
Answers
Answer: 1. The nitrogen cycle is a biogeochemical cycle.
2. The carbon cycle is a biogeochemical cycle.
Explanation:
1. The nitrogen cycle can be defined as the biogeochemical cycle in which the atmospheric nitrogen is utilized by the plants which is fixed by the soil bacteria. The nitrogen becomes the part of the biosphere as plants utilize it as an important development mineral. The nitrogen cycle involves the nitrogen fixation in which plants fix nitrogen by the help of bacteria into ammonia, nitrification in which the ammonia is converted into nitrite, nitrogen assimilation in which the plants assimilate and utilize the nitrogen for their growth and development, and denitrification involves the reduction of nitrite into atmospheric nitrogen. The conversion of nitrogen is carried out via physical and biological processes.
2. The carbon cycle involves the atmospheric carbon dioxide being circulated in plants as they utilize it for photosynthesis. The carbon dioxide is fixed by the plants in the form of carbohydrate which is consumed by the animals and on decomposition of plants and animals dead matter release carbon dioxide gas to the atmosphere. This allows the recycling of the carbon dioxide gas in the environment.
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Explain the feedback mechanisms that control ventilation and circulation to include
the pacemaker of the heart.
Answers
It should be noted that the homeostatic feedback mechanisms that are important to regulate the ventilatory pattern of respiration involves the medulla and the pons.
Homeostatic feedback mechanisms.The pons are divided into two groups. Firstly, the pneumotaxic center sends signals that inhibit inspiration as it limits the activity of the phrenic nerve. Due to this, the signals of the apneustic center and the tidal volume decreases.
Secondly, the apneustic center signals inspiration for deep and long breaths and controls the intensity of breathing. The stretch receptors of the pulmonary muscles inhibit the apneustic center, therefore, it increases tidal volume.
Also, the medulla has two functional regions as well which are the ventral respiratory compartment, that stimulates expiratory movements, and the dorsal respiratory region that triggers inspiratory movements.
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What is a recombination? How is it different from mutation
Answers
: the process occurring in Meiosis I, in which offspring are able to obtain unique traits resulting in an array of different phenotypes (physical appearances).
Prophase I,
the homologous chromosomes line up in the middle of the cell and exchange segments of alleles, and then lining up in the cell in a NON-uniform way.... therefore resulting in genetically unique offsprings rather than identitical.
Mutations are result of evolutionary factors. They create genetic diversity that helps species adjust to different climates, behaviours and foods. Mutations that occur in a fit indivual can result in offspring that are genetically more successful in adjustments to different climates, foods, and environments.
All in all Recombination results in unique looking indivuals, whereas mutations result in greater survival chances of a species.
The correct chronological sequence of how the endocrine glands are activated during the alarm reaction stage is
Answers
Answer:
The correct sequence is: Hypothalamus, Pituitary, Adrenal
Explanation:
The endocrine system comprises of cells, tissues, and organs that discharge hormones as an essential or auxiliary capacity. The endocrine gland is the significant part in this system. The essential capacity of these ductless glands is to discharge their hormones straightforwardly into the encompassing liquid. The interstitial liquid and the veins at that point transport the hormones all through the body. The endocrine system incorporates the pituitary, thyroid, parathyroid, adrenal, and pineal organs
According to figure 25 to which star is the hottest
Answers
Answer: GeoPanther The star that is hotter than the Sun is Vega. This is due to the fact that Vega is much closer to the Main Sequence. In this part of the galaxy the temperature is much bigger, the density is also bigger, and the stars in this part have bigger temperatures and also densities, no matter the size of them. Advertisement damenxaviermoore
Explanation:
What is an example of a population in a desert ecosystem
Answers
Answer:
scorpions
Explanation:
scorpions live in but the desert
Floods, droughts, fires, and earthquakes are examples of
Answers
Answer:
the answer is natural disasters
Answer:
Natural disasters
Explanation:
hope this helps
Explain what the acoustic measure H1-A3 is. Additionally discuss why a large value of the measure H1-A3 would reflect a breathy voice. (Hint: consider using these terms: vocal fold closure, spectral tilt).
Answers
The acoustic measure H1-A3 represents the difference in frequency between the first harmonic (H1) and the third formant (A3) in a speech signal.
The first harmonic is the lowest frequency component of the voice signal, while the third formant is a resonance frequency that is related to the shape and size of the vocal tract.
A large value of H1-A3 indicates that the third formant is higher in frequency than the first harmonic, which is a characteristic of breathy voice quality.
This is because breathy phonation is associated with incomplete vocal fold closure, which results in a weaker and more turbulent airflow through the vocal tract.
This causes a change in the spectral tilt, which in turn leads to an increase in the frequency of the third formant relative to the first harmonic, resulting in a larger H1-A3 value.
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Which of the following is a nonrenewable resource?
A.
Wind
B.
Natural gas
C.
Hydropower
D.
Biomass
Answers
Answer:
B. Natural gas
Explanation:
the ozone layer is a/an
A- layer of soil where oxygen is particularly abundant
B- atmospheric process like climate change
C- layer of the atmosphere, rich in ozone gas, that protects the Earth's inhabitants from the harmful effects of UV radiation
D- layer of gas at the bottom of the ocean that bubbles off when disturbed
Answers
Answer:
the answer is c
Explanation:
pretty simple
The ozone layer is best described as a layer of the atmosphere, rich in ozone gas, that protects the Earth's inhabitants from the harmful effects of UV radiation. The correct option is C.
The ozone layer is found in the stratosphere, a region of the Earth's atmosphere located approximately 10 to 50 kilometers above the Earth's surface.
It contains a higher concentration of ozone (O3) molecules compared to other parts of the atmosphere.
The ozone molecules in this layer absorb a significant portion of the incoming UV radiation from the Sun, thereby shielding living organisms on Earth from its harmful effects.
UV radiation can be harmful to human health and ecosystems.
Overexposure to UV radiation can cause sunburn, skin cancer, cataracts, and immune system suppression in humans.
Thus, the correct option is C.
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WILL BE MARKED BRAINLIEST PLUS 12 POINTS
The author of the passage would most likely agrees that
Answers
Answer:
The answer is D
Explanation:
it is the only one that makes sense
An organism has 18 chromosomes in its body cells. Its sex cells have 9 chromosomes.
Which statement correctly explains this?
Answers
For an organism that has 18 chromosomes in its body cells and its sex cells have 9 chromosomes, the correct statement is C, Its sex cells are haploid and a result of meiosis.
What are haploids?Haploid cells have half the number of chromosomes as diploid cells. Mitosis is a type of cell division that produces two identical daughter cells. Meiosis is a type of cell division that produces four daughter cells, each with half the number of chromosomes as the parent cell.
In the organism described, the body cells are diploid (18 chromosomes) and the sex cells are haploid (9 chromosomes). This is because the sex cells are produced by meiosis, which is a type of cell division that reduces the number of chromosomes by half. This allows the sex cells to combine with each other to form a new diploid cell, which is the beginning of a new organism.
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Complete question:
An organism has 18 chromosomes in its body cells. Its sex cells have 9 chromosomes.
Which statement correctly explains this?
Its body cells are haploid and a result of mitosis.
Its sex cells are diploid and a result of mitosis.
Its sex cells are haploid and a result of meiosis.
Its body cells are diploid and a result of meiosis.
In humans, the presence of freckles is a dominant inheritance, and their absence is a recurrent trait. The shape of the eyebrows is also a hereditary characteristic, the separate eyebrows being a dominant characteristic, and the joined eyebrows being a recurring character. In a couple, the woman has freckles and separate eyebrows, and she is heterozygous for both characters. The man does not have freckles, but he has eyebrows closed. How likely is their child to have freckles and separate eyebrows? Use a tree diagram or a Punnett square to justify your answer.
Answers
When crossing a woman -who is heter0zyg0us for freckles and shape of eyebrows- with a man -who is h0m0zyg0us recessive for both traits-, the likelihood of their child to have freckles and separate eyebrows is 1/4 = 25%.
-------------------------------------------
Available data:
Two diallelic genes ⇒ One of them codes for freckles and the other one for the shape of the eyebrows.Freckles ⇒ Dominant allele F ⇒ Codes for freckles.⇒ Recessive allele f ⇒ No freckles.
Eyebrows shape ⇒ Dominant allele E⇒Codes for separate eyebrows.⇒ Recessive allele e ⇒ Codes for joined eyebrows.
Woman ⇒ Heter0zyg0us for both genes. She has freckles and separate eyebrows.Man ⇒ H0m0zyg0us recessive for both traits. He does not have freckles, but he has eyebrows closed.Cross: The woman with the man
Parentals) FfEe x ffee
Gametes) FE, Fe, fE, fe ⇒ woman
fe, fe, fe, fe ⇒ man
Punnett Square) FE Fe fE fe
fe FfEe Ffee ffEe ffee
fe FfEe Ffee ffEe ffee
fe FfEe Ffee ffEe ffee
fe FfEe Ffee ffEe ffee
F1) Genotype:
4/16 = 1/4 = 25% of the progeny will be heter0zyg0us for both traits, FfEe4/16 = 1/4 = 25% of the progeny will be heter0zyg0us for freckles, but h0m0zyg0us recessive for eyebrow trait, Ffee4/16 = 1/4 = 25% of the progeny will be heter0zyg0us for eyebrow trait, but h0m0zyg0us recessive for freckles trait, ffEe 4/16 = 1/4 = 25% of the progeny will be h0m0zyg0us recessive for both traits, ffee.
Phenotype:
4/16 = 1/4 = 25% of the progeny will have freckles AND separate eyebrows, FfEe4/16 = 1/4 = 25% of the progeny will have freckles AND closed eyebrows, Ffee4/16 = 1/4 = 25% of the progeny will not have freckles AND will have separate eyebrows, ffEe4/16 = 1/4 = 25% of the progeny will not have freckles AND will have closed eyebrows, ffee-----------------------------------------------
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An igneous rock is light in color and has extremely coarse grains. What is the most likely origin of the rock?
A a magma chamber
B the bottom of the ocean
C an outer slope of a volcano
D the shore of a volcanic island
Answers
Answer:
The correct answer is a magma chamber
Explanation:
Got it right on Edge 2020
Why does natural selection occur more when there is competition for resources?
Answers
Natural selection occurs more prominently when there is competition for resources because competition creates selective pressures that drive adaptations and favor certain traits over others.
In any given environment, resources necessary for survival and reproduction, such as food, water, and shelter, are limited. As a result, individuals within a population must compete with one another to obtain these resources.
Competition leads to differential survival and reproductive success among individuals.
Those individuals with advantageous traits or variations that enable them to more effectively acquire and utilize resources have a higher likelihood of survival and producing offspring.
These advantageous traits can be physical characteristics, physiological adaptations, or behavioral strategies that provide a competitive edge.
Through natural selection, individuals possessing beneficial traits are more likely to pass on their genes to the next generation, while individuals with less favorable traits are at a disadvantage.
Over time, this process results in the accumulation of beneficial traits within the population, enhancing their overall fitness and adaptation to the specific environment.
Therefore, competition for resources acts as a driving force for natural selection by selecting for traits that enhance an individual's ability to secure limited resources, survive, and reproduce successfully.
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is the expierement controlled expirement
Answers
Answer:
yes..................