The auditory tubes allow infections in the nasopharynx to spread to the middle ear.
a. true
b. false
Answers
True, the auditory tubes allow infections in the nasopharynx to spread to the middle ear.
The auditory tubes, also known as Eustachian tubes, connect the middle ear to the nasopharynx, which is the upper part of the throat behind the nasal cavity. These tubes play a crucial role in equalizing the pressure between the middle ear and the outside environment.
However, the connection between the middle ear and the nasopharynx through the auditory tubes can also allow infections to spread. When there is an infection or inflammation in the nasopharynx, such as during a common cold or sinus infection, the pathogens can travel through the auditory tubes and reach the middle ear. This can lead to a condition called otitis media, which is an infection or inflammation of the middle ear.
The spread of infections from the nasopharynx to the middle ear through the auditory tubes is more common in children due to their relatively shorter and more horizontal tubes.
In adults, the tubes are longer and more angled, making it more difficult for infections to ascend. However, in certain circumstances such as allergies, respiratory infections, or anatomical abnormalities, the risk of infection spreading to the middle ear through the auditory tubes can still exist.
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Related Questions
Which is one of the primary consumers in the above food web?
1.Lion
2.Owl
3.Goat
4.Green Plant
Answers
Answer:
Lion
Explanation:
He can kill the owl and goat
Convergent evolution is a process where organisms independently evolve traits. Some molecular data place the giant panda in the bear family (Ursidae) but place the lesser panda in the raccoon family (Procyonidae). Consequently, the morphological similarities of these two species are probably due to
Answers
Answer:
analogous structures
Explanation:
Analogous structures play similar and/or identical functions in unrelated organisms. For example, moths and bats both have wings, even though they aren't related. Convergent evolution is a process that generates analogous structures in organisms that don't share a common ancestor with such structures. Moreover, homo-logous structures are shared traits between organisms that share a common ancestor. On the other hand, divergent evolution is a process associated with the accumulation of phenotypic differences between organisms within a species, which eventually lead to speciation.
Which of the following is NOT explicitly needed to calculate carrying capacity
Answers
Answer:
different between androclium and gynoecium
Answer:
B.
Explanation:
The other two options are things associated with different cargo, Weather isn't associated with how much an object would weigh, it's only associated with how and when the cargo will get somewhere...
please help I really ask for your help.what insects don't have biting and chewing mouth parts.
Answers
which procedure took the DNA from one sheep to produce a genetically identical lamb name dolly
1. selective breeding
2. gene therapy
3. artificial selection
4. cloning
Answers
Answer: Cloning
Explanation:
Replicating DNA to recreate an identical counterpart would be cloning.
What are the two major stages of photosynthesis in plants called?
Answers
what contributes to antigenic shift in influenza viruses?
Answers
Answer:
The particular structure of the influenza virus genome and function of its viral proteins enable antigenic drift and antigenic shift.
Answer:
Between worldwide outbreaks, known as pandemics, influenza viruses undergo constant, rapid evolution (a process called antigenic drift ), which is driven by mutations in the genes encoding antigen proteins.
Antigenic shift is the process by which two or more different strains of a virus, or strains of two or more different viruses, combine to form a new subtype having a mixture of the surface antigens of the two or more original strains. The term is often applied specifically to influenza, as that is the best-known example, but the process is also known to occur with other viruses, such as visna virus in sheep. Antigenic shift is a specific case of reassortment or viral shift that confers a phenotypic change.
Explanation:
molecular orbital (mo) theory treats a molecules as a collection of nuclei with mos delocalized over the entire structure. group of answer choices true false
Answers
The statement "molecular orbital (MO) theory treats a molecule as a collection of nuclei with MOs delocalized over the entire structure" is true. It is a fundamental concept in molecular orbital theory, which is one of the two primary ways to describe the electronic structure of a molecule.
In this theory, each molecule is viewed as a whole with its constituent atoms' atomic orbitals combined to generate new molecular orbitals.The electrons are assigned to these new MOs according to the Pauli exclusion principle and Hund's rule, which govern the electronic configuration of the molecule.
The molecular orbital theory explains the bonding, antibonding, and nonbonding interactions between electrons, which underlies the physical and chemical properties of the molecule.MO theory also makes it possible to describe the molecule's spectroscopic properties, such as UV-visible and infrared spectra. For example, electronic transitions that lead to absorption in the UV-visible region of the electromagnetic spectrum can be attributed to electron excitation from the bonding to antibonding molecular orbitals.In conclusion, molecular orbital theory treats a molecule as a collection of nuclei with MOs delocalized over the entire structure.
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What type of microscope would be best for studying the movement of the digestive and circulatory systems of Daphnia magna? __
Answers
Answer:
Light
Explanation:
I just took the test and got it right.
We are required to find the type of microscope would be best for studying the movement of the digestive and circulatory systems of Daphnia magna
The type of microscope which would be best for studying the movement of the digestive and circulatory systems of Daphnia magna is Electron microscope.
Daphnia magna is a small planktonic crustacean with a size of about 1.5mm - 5mm that belongs to the subclass Phyllopoda.Microscope is laboratory instrument use to examine objects that are too small to be seen with the naked eyes.The best type of microscope that can be used to study the movement of the digestive and circulatory system ofDaphnia magna is an
Electron microscope.
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The endocrine and nervous systems are considered ________ homeostatic regulatory
Answers
The endocrine and nervous system are considered extrinsic homeostatic regulatory mechanisms.
What is the difference between endocrine and nervous system?1) In the nervous system electrical impulse carries message to different organs of the body and in the endocrine system it releases hormones and provide chemical signal to command an organ.
2) Nerve or electrical impulse transmit through neurons and hormones travel through bloodstream.
3) The nervous system can control voluntary as well as involuntary and all the activities and operation under the endocrine system are involuntary.
These two system help in regulation of the electrical and chemical possess that relay information throughout and between the brain and body .
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Which instruments in the percussion family are pitched?
Answers
In the percussion family, there are only a few instruments that are considered pitched.
One example of a pitched percussion instrument is the xylophone. The xylophone is made up of wooden bars that are arranged in order of pitch, with the lowest pitch on the left and the highest pitch on the right. The bars are struck with mallets to produce sound.
Another example of a pitched percussion instrument is the timpani, also known as the kettle drum. Timpani is large drums with a definite pitch, and are often used in orchestras. They are tuned to specific notes by adjusting the tension on the drumhead. The player changes the pitch of the timpani by using foot pedals to tighten or loosen the drumhead, which changes the pitch of the sound produced when the drum is struck.
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If body potassium is depleted (hypokalemia), what state best describes the altered membrane potential of the cell?
Answers
In the case of hypokalemia, where body potassium is depleted, the altered membrane potential of the cell is characterized by hyperpolarization, meaning the membrane potential becomes more negative.
Potassium (K+) is a vital electrolyte that plays a crucial role in maintaining the normal functioning of cells, including the generation and conduction of electrical signals. In a healthy state, potassium concentrations inside and outside the cell are balanced, contributing to the resting membrane potential.
However, when there is a depletion of body potassium (hypokalemia), the reduced intracellular potassium levels disrupt the balance. This alteration has a significant impact on the membrane potential of the cell. Potassium ions are the primary determinants of the resting membrane potential, as they contribute to the negative charge inside the cell. With decreased intracellular potassium, the membrane potential becomes more negative than its usual resting potential, resulting in hyperpolarization.
Hyperpolarization makes it more challenging for the cell to generate an action potential, as it requires a greater depolarization from the hyperpolarized state to reach the threshold for firing an electrical impulse. This can lead to disruptions in various physiological processes, such as muscle contractions, nerve cell signaling, and cardiac rhythm, which rely on the proper functioning of membrane potentials.
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right now humans are making more co2 faster than _______ can absorb it.
Answers
have you ever heard of something called a p l a n t?
GIVING BRAINLIEST
Lodgepole pine trees produce seeds in cones. The cones open after being exposed to high temperatures created by wildfires. How does this adaptation help the lodgepole pine survive?
A) It allows the lodgepole pine tree to make more seeds in cones that are hard to open.
B) It creates more wildfires for the lodgepole pine tree to reproduce.
C) It makes the seeds travel and grow in areas where there are no wildfires.
D) It helps the lodgepole pine tree to protect the seeds and to reproduce.
Answers
Answer:
D
Explanation:
A layer of resin and woody tissue sticks the cones' scales together. The seeds are locked in tight, and the cones can't open unless they're exposed to VERY high temperatures like the type of temperatures that fire provides. This shows they survive through exposing the seeds after forest fires.
Answer:
D
Explanation:
A It allows the lodgepole pine tree to make more seeds in cones that are hard to open. IS WRONG B) It creates more wildfires for the lodgepole pine tree to reproduce. IS WRONG C) It makes the seeds travel and grow in areas where there are no wildfires. DEFINITLY NOT so that leaves it with D It helps the lodgepole pine tree to protect the seeds and to reproduce.
PLEASE ASAAPPP
In its life cycle, a star becomes a red supergiant and then a black hole. Which
type of star is it?
OA. A neutron star
OB. A supernova
OC. A massive star
OD. A gas giant
Answers
The star is a supernova
What type of star becomes a red supergiant and then a black hole?As a massive star evolves, it fuses hydrogen in its core to form helium, which then fuses to form progressively heavier elements. Eventually, the core of the star will become dominated by iron, which cannot be fused to form heavier elements. At this point, the core collapses, generating a supernova explosion that expels the outer layers of the star.
If the remnant of the supernova has a mass greater than about 2.5 times the mass of the Sun, the gravitational forces can become so strong that nothing can escape, not even light. This results in the formation of a black hole. Prior to the supernova, the star may have expanded to become a red supergiant, a large and luminous star with a cool surface temperature.
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Part a :put the paramecium or protist slide on the base of your compound microscope.
Answers
Paramecium is a genus of eukaryotic unicellular ciliates and is widely studied as a representative of the ciliate group. Paramecium is widely distributed in freshwater, brackish and marine territories and is expected in sedentary aquariums and ponds. Some species are widely used in classrooms and laboratories to explore biological processes because they are easy to culture and easily induce binding and division. Its usefulness as a model organism has led some ciliate investigators to characterize it as a "white rat" in the phylum Ciliate.
What is compound microscope?Paramecium size range from 50 to 330 microns (0.0020 to 0.0130 inches). The cells are usually oval, rectangular, foot or cigar-shaped.The body of a cell is surrounded by a rigid but flexible structure called a membrane. It consists of an outer cell membrane (protoplasmic membrane), a layer of flat membrane-bound sac called the alveoli, and an intima called epiplasma. The cuticle is not soft, but consists of hexagonal or rectangular indentations. Each of these polygons is perforated by a central opening with a single cilia protruding. Between the alveolar sac of the cuticle, most Paramecium species have a dense spindle-shaped trichocyst, an explosive organelle that secretes thin, non-toxic filaments often used for defensive objectives.To learn more about compound microscope, refer to:
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Most calico cats are female. However, a few rare males are observed. What is the genotype of a male calico cat?a. X BX Ob. X OYc. X BYd. X BYYe. X BX OY
Answers
The genotype of a male calico cat is: (e) \(X^{B} X^{O} Y\).
Genotype is the genetic composition of the entire genome of an organism. The genes are the basic unit that make up the genome. Each gene comprises of a pair of alleles. Alleles are the alternating forms of the gene, that may or may not be the same. The arrangement of these alleles decides the genotype.
The domestic cats consisting of three coat colors are called the calico cats. They can be of any breed. 25-75 % of the calico cats have large orangs and black patches along with white color. When mutations occur in these cats, the other colors that can be observed are: cream, blue-black, reddish, brown.
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much of the food crops in the united states are transgenic, or genetically modified organisms (gmo). this primarily has been done to give the crops what properties?
Answers
Food crops in The United States are transgenic or genetically modified organisms. This has been done to give the crops : The ability to resist insects and herbicides.
What are genetically modified organisms?An organism that has had an artificial genetic change utilizing techniques of genetic engineering such as gene transfer or recombinant DNA is called genetically modified organisms (GMO).
GMOs can be helpful to mankind when used for purposes such as increasing the availability and quality of food and medical care and also contributing to a cleaner environment.
Most of the genetically modified crops have been developed to improve yield through the introduction of resistance to plant diseases or increased tolerance of herbicides.
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Mutations cause changes in _____.
Multiple choice question.
cross out
A)
elements
cross out
B)
proteins
cross out
C)
compounds
cross out
D)
essential nutrients
Answers
10) A species is considered introduced when its transport into an area outside of its native range is human mediated. Introductions by humans may be either intentional or accidental. In the U.S. many
economically important species have successfully been introduced and managed: they have not become invasive species. Identify the statement that is NOT CORRECT regarding the positive effects
of
introduced species
A) All Livestock species except the American bison and the turkey are introduced species to North America.
B) Thomas Austin, a British landowner had rabbits released on his estate in Victoria, Australia because he missed hunting them.
Eliminate
Species, such as the wolf, are reintroduced because it has become locally endangered or extinct and this is done in the interest of conservation
D) Many plants, such as the Norway maple and the Japanese maple, have been introduced with the intent of aesthetically improving public recreation areas of private
properties
Answers
Answer:
The introduction of new species in the new area make the specie invasive if there is no predator is present in that ecosystem because the predator helps in the controlling of the population of that invasive species. The big example of invasive species is rabbit in the Australia where rabbit become invasive when there is no predator is present in that region so they increase in population and destroy all vegetation of that region. So if there is no predator of a newly introduced species, it become invasive in future.
Explanation:
What are proteins composed of, and what are their main functions in the body
Answers
Answer:
Proteins are large, complex molecules that play many critical roles in the body. They do most of the work in cells and are required for the structure, function, and regulation of the body’s tissues and organs.
Proteins are made up of hundreds or thousands of smaller units called amino acids, which are attached to one another in long chains.
Explanation:
What molecule is split in the oxygen-releasing light reactions of photosynthesis?.
Answers
Water molecule is the molecule split during the oxygen-releasing light reactions of photosynthesis.
The oxygen-releasing light reactions of photosynthesis occurs in the chloroplast of plants. Here, a green pigment, chlorophyll traps the energy from sunlight. This energy is used to split a water molecule gotten from the xylem of the plant into oxygen and electrons. The oxygen is released as a by-product, and the electrons are used in further reactions.
What is photosynthesis?This is the process whereby carbon dioxide, water and sunlight are used to manufacture glucose, using the energy from sunlight.
Most autotrophs (organisms that make their own food) like plants make use of photosynthesis to manufacture glucose. This glucose gotten from photosynthesis is sent to other parts of the plant through phloem tissues to be used for other metabolic processes, or is stored and used as food by other organisms.
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How much oxygen is consumed by fish species
Answers
Answer:
This is not generally realized but is vital when designing aeration systems for growing on warm water species. Most research indicates that trout consume around 200 – 250 mg O2/kg/hour. I regularly record carp consuming three times as much at 700- 800 mg/kg/hour under optimal growing conditions.
Explanation:
Answer: adult fish usually are between 200 and 500 mg oxygen
What is the difference between the structure of the atrioventricular valves and the semilunar valves? What is the function of each type of valve?
Answers
The function of the iris diaphragm is to control the amount of light that passes through the specimen on the microscope slide.
By adjusting the size of the opening, the user can adjust the brightness and contrast of the image. The substage condenser is responsible for focusing the light from the microscope's light source onto the specimen. It also helps to concentrate the light and direct it towards the specimen, which improves the quality of the image that is produced. Overall, both the iris diaphragm and the substage condenser play important roles in ensuring that microscope images are clear and well-illuminated.
The function of the iris diaphragm is to regulate the amount of light entering the microscope by adjusting the size of the aperture. This helps in optimizing the contrast and resolution of the observed specimen.
The function of the substage condenser, on the other hand, is to focus and direct the light from the light source onto the specimen. It improves the quality of the illumination, ensuring a sharper and more evenly lit image.
In summary:
1. Iris diaphragm: Regulates light entering the microscope.
2. Substage condenser: Focuses and directs light onto the specimen for better illumination.
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is the longissimus cervicis muscles is visible on the red man model but not the pink man model. true or false?
Answers
The given statement " the longissimus cervicis muscles is visible on the red man model but not the pink man model" is false.
The longissimus cervicis muscle is visible on both the red man and pink man models. The longissimus cervicis is a muscle located in the neck region of the human body, and it is part of the erector spinae muscle group. These muscles run along the length of the spine and help with the extension and lateral flexion of the vertebral column.
The red man and pink man models are commonly used in medical education and anatomical studies to represent different anatomical structures and systems of the human body.
However, the color of the model does not affect the visibility of specific muscles. The longissimus cervicis muscle would be present and visible on both models, as it is an important muscle in the neck region and plays a role in various movements and postural control.
Therefore, the given statement is false.
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In shorthorn cattle, when a red bull (RR) is crossed with a white cow (WW), all the offspring are roan—a spotted, red and white color. What offspring are expected from mating a roan bull and a roan cow?
Answers
Answer:
25% red
50% roan
25% white
Explanation:
When RR (red) is crossed with WW (white), it results in roan color.
RR (red) x WW (white)
RW (roan)
Two roan individuals are then mated.
RW x RW
RR RW RW WW
Offspring
1/4 RR - Red
1/2 RW - Roan
1/4 WW - White
Hence, the offspring are expected to be 25% red, 50% roan, and 25% white.
hi yall! quick question.
Which of the following group of organisms are prokaryotes?
Archaea
Dinosaur
Fish
Fungi
Answers
Answer:
Archaea is prokaryotes...
Explanation:
Hope it helps you
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Answer: A. Archaea
Explanation: Prokaryotes are single-celled organisms of the domains
Plants are unique because they have _____, which absorb light energy from the Sun.
Answers
Answer:
Chloroplasts
Explanation:
Plants have chloroplast which can convert light energy from sun into chemical energy for the plant.
The ability to use old cells is an advantage of _____.hybridization DNA testingrestriction fragment length polymorphism (RFLP) polymerase chain reaction (PCR) all DNA testing procedures
Answers
The ability to use old cells is an advantage of all DNA testing procedures.
Which of the following statements relates to the cell theory?
I All non-living things are composed of cells
II All cells come from other cells
III Cells have similar functions
IV The cell is the basic unit of structure in all organisms
Answers
Answer:
IV The cell is the basic unit of structure in all organisms
Explanation: