Answers
Answer:
TRUE
Explanation:
It is true that a pathogen that lives on mucous membranes is most likely transferred from one host to another. Mucous membranes are moist linings in the body that are found in areas such as the mouth, nose, and genitals, and are a common site for the colonization of pathogenic bacteria and viruses.
Because these pathogens thrive in moist environments, they are often spread through close contact between individuals, such as through kissing, sexual activity, or sharing utensils or other objects that come into contact with mucous membranes.
However, it is not necessarily true that such pathogens do not survive for very long in the outside environment, as this can vary depending on the specific pathogen in question. Some pathogens may be able to survive for a short time on objects or surfaces outside the body, while others may be able to survive for longer periods of time in the right conditions.
Related Questions
What is the main reason the chapter mentions that mammals survived the K-T extinction?
Food became scarce
There was not the competition with the dinosaurs
The climate become cold
The climate become warm
Answers
The main reason mentioned in the chapter for mammals surviving the K-T extinction is that there was not the competition with the dinosaurs.
The main reason mentioned in the chapter for mammals surviving the K-T extinction is that there was not the competition with the dinosaurs.
The K-T extinction event refers to the mass extinction that occurred approximately 66 million years ago, marking the end of the Cretaceous period and the extinction of non-avian dinosaurs.The chapter highlights that the survival of mammals during this extinction event was facilitated by the absence of competition with dinosaurs.Dinosaurs were the dominant terrestrial vertebrates during the Mesozoic Era, occupying various ecological niches and competing with other organisms for resources such as food and habitat.With the extinction of dinosaurs, the ecological landscape was radically altered, creating new opportunities for mammals to diversify and occupy ecological roles that were previously filled by dinosaurs.Mammals, being small and adaptable, were able to exploit different food sources, habitats, and ecological niches without the competition and predation pressure posed by dinosaurs.This lack of competition allowed mammals to thrive and diversify, eventually giving rise to the wide variety of mammalian species that exist today.Therefore, the absence of competition with dinosaurs is identified as a significant factor that contributed to the survival and subsequent success of mammals during the K-T extinction event.
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n apneustic breathing, which is practiced by most marine mammals: A. A small amount of air is kept in the lungs before diving B. A large amount of air is kept in the mouth before diving C. Normal breathing is maintained before diving D. Several deep breaths are taken before exhaling and diving E. No actual breathing takes place before diving
Answers
Complete Question: In apneustic breathing, which is practiced by most marine mammals:
A. A small amount of air is kept in the lungs before diving
B. A large amount of air is kept in the mouth before diving
C. Normal breathing is maintained before diving
D. Several deep breaths are taken before exhaling and diving
E. No actual breathing takes place before diving
Answer: D. Several deep breaths are taken before exhaling and diving.
Explanation:
Common dolphins, whales and other marine mammals are known to undergo apneustic breathing. This breathing process is characterized by periodic or several breathe inhalation, followed by holding their breath and then exhaling them.
Marine mammals can afterwards, went on to dive. This process prevent high water loss out. Thus, they make fewer respirations while maximizing the amount of oxygen produced for optimal consumption.
Why is NAD+ so important if the cell takes the anaerobic pathway, so glycolysis to fermentation? Does the atp made in glycolysis depend on the NAD+ conversion to NADH in the first step? I am confused on why NAD+ is so important to atp production
Answers
Answer:
NAD+ (nicotinamide adenine dinucleotide) is indeed crucial for ATP production, even in anaerobic pathways such as glycolysis followed by fermentation. Allow me to explain the significance of NAD+ and its role in ATP production.
During glycolysis, glucose is broken down into pyruvate, producing a small amount of ATP and NADH. The conversion of NAD+ to NADH occurs during the oxidation of certain molecules, including glucose, in the pathway. This conversion is essential because NADH carries high-energy electrons that can be used in subsequent steps to generate more ATP.
In aerobic respiration, NADH is further utilized in the electron transport chain (ETC) within the mitochondria. The ETC transfers electrons from NADH to oxygen, generating a significant amount of ATP through oxidative phosphorylation. However, in anaerobic conditions where oxygen is limited, like during fermentation, the ETC cannot function.
Here's where NAD+ becomes critical. In order to keep glycolysis running and continue generating ATP, the NADH produced during glycolysis must be converted back to NAD+. This allows glycolysis to continue producing ATP, even without the presence of oxygen. Without a mechanism to regenerate NAD+, glycolysis would halt due to a lack of NAD+, leading to a severe reduction in ATP production.
Fermentation pathways differ depending on the organism, but they all involve the regeneration of NAD+. For example, in lactic acid fermentation, pyruvate is converted into lactate, which involves the transfer of electrons from NADH to pyruvate, regenerating NAD+. Similarly, in alcoholic fermentation, pyruvate is converted into ethanol, again regenerating NAD+.
In summary, NAD+ is essential in anaerobic ATP production because it serves as a coenzyme that accepts electrons and facilitates the conversion of NADH back to NAD+. By regenerating NAD+, cells can sustain glycolysis and continue producing ATP, even in the absence of oxygen.
Which of the following statements regarding changes in the position of the uterus in relation to changes in bladder volume is correct?
-When the bladder fills, the uterus tilts posteriorly in relation to the vaginal stripe.
-When the bladder empties, the uterus tilts anteriorly in relation to the vaginal stripe.
Answers
The statement "When the bladder empties, the uterus tilts anteriorly in relation to the vaginal stripe." is correct regarding changes in the position of the uterus in relation to changes in bladder volume.
As the bladder fills with urine, it expands and can push the uterus upwards and backward, which can cause the uterus to tilt slightly posteriorly. When the bladder empties, it becomes smaller and the uterus can move forward and tilt slightly anteriorly. This movement of the uterus is due to its position backward, where it is located just in front of the rectum and behind the bladder. The movement of the uterus in relation to the bladder is also influenced by other factors such as the tone of the pelvic floor muscles and the size of the uterus.
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In a diploid species of plant, the genes for plant height and fruit shape are syntenic and separated by 18 m.u. Allele D produces tall plants and is dominant to d for short plants, and allele R produces round fruit and is dominant to r for oval fruit. The expected percentages of progeny phenotypes are listed below:
tall oval = 41%
short round = 41%
tall round = 9%
short oval = 9%
(a) What proportion are expected to be tall and produce round fruit?
Answers
In a diploid plant species, the proportion of progeny expected to be tall and produce round fruit is 32%.
In a diploid species of plant, the genes for plant height and fruit shape are syntenic and separated by 18 m.u. The expected percentages of progeny phenotypes are tall oval = 41%, short round = 41%, tall round = 9%, and short oval = 9%.To determine the proportion of progeny expected to be tall and produce round fruit, we need to consider the alleles for each trait. Allele D produces tall plants (dominant) and allele d produces short plants (recessive). Allele R produces round fruit (dominant) and allele r produces oval fruit (recessive).From the given percentages, we can deduce that tall ovals and short ovals combined make up 9%. Since tall oval is 41% and short oval is 9%, the proportion of progeny expected to be tall and produce round fruit is 41% - 9% = 32%.Therefore, the proportion of progeny expected to be tall and produce round fruit is 32%.For more questions on diploid plant
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If the enzyme salivary amylase were present at 70℃, what inside the bloodstream would indicate this? What could happen to this person?
Answer in claim, evidence, and reasoning.
Answers
Answer:g
Explanation: w uzuhs
What two practices complement each other within the global carbon cycle
Answers
Answer:
photosynthesis and metabolism
Explanation:
during photosynthesis, plants use carbon dioxide and produce oxygen. during metabolism, oxygen is used and carbon dioxide is a product.
What would most likely happen to a cell undergoing mitosis if you introduced an inhibitor to Aurora B at prometaphase
Answers
Answer:
Nuclear division will not occur in that cell
Please find the explanation below
Explanation:
Mitosis is a type of cell division in which two genetically identical daughter cells form from a single cell. The mitotic process occurs in stages, which includes the PROMETAPHASE described in this question. Prometaphase is the second stage of mitosis i.e after prophase and before metaphase.
Prometaphase stage is characterized by the degradation of the nuclear envelope in order to allow the sister chromatids to be separated into opposite poles. Also, a protein called KINETOCHORE forms at the centromere in order for the microtubules to attach to them in subsequent stages.
If an inhibitor is introduced into the cell at PROMETAPHASE stage, the activities described above, which are important for the separation of the chromatids, will not occur. Hence, the likely effect on the cells is INABILITY of NUCLEAR DIVISION TO OCCUR.
The most likely outcome of the addition of an inhibitor to Aurora B in prometaphase of a cell undergoing mitosis is the fact that sister chromatid arms would not separate (Option B).
Aurora B is a crucial regulator of accurate mitosis that localizes to the chromosomes during prophase, the centromeres during metaphase, and the mitotic spindle during anaphase.During prometaphase, this protein (Aurora B) regulates the association of motor proteins with the kinetochore, which s a structure associated with duplicated chromatids in eukaryotic cells.The interactions of the kinetochores with microtubules of the mitotic spindle modulate the movement of chromosomes during prometaphase and metaphase, and subsequent segregation during anaphase.In conclusion, the most likely outcome of the addition of an inhibitor to Aurora B in prometaphase of a cell undergoing mitosis is the fact that sister chromatid arms would not separate (Option B).
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Systems thinking is useful in dealing with recurring problems or those that have been made worse by past attempts to fix them. Select one: True False
Answers
Explanation:
Explanation:
Since no chemical is completely free of adverse effects, given the right dose and conditions, which of the following statements is most likely to be true O Natural products are safer than synthetic products | Natural products are usually safer than synthetic products Natural products are usually less safe than synthetic products None of the above
Answers
None of the above statements can be considered generally true, as the safety of a chemical depends on various factors including dose, exposure, and individual susceptibility.
The safety of a chemical depends on various factors including dose, exposure, and individual susceptibility.
Which is generally safer, natural or synthetic products?None of the above statements can be considered generally true, as the safety of a chemical depends on various factors including dose, exposure, and individual susceptibility.
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Which scenario is most likely to result in secondary succession?
Responses
lava cooling and forming bare rock after a volcanic eruption
a forest fire clearing out trees and underbrush
a glacier receding back up a mountain
a flood washing away all plant life and topsoil from an area
Answers
Answer:
''A forest fire clearing out trees and underbrush.''
Explanation:
A forest fire clearing out trees and underbrush is most likely to result in secondary succession. Secondary succession is the process of ecological succession that occurs after an area of land has been disturbed but has not been completely destroyed. In the case of a forest fire, the soil is still intact and there are still seeds and other organisms present in the area that can begin to grow and repopulate the area. Over time, the area will gradually return to its original state, with a diverse mix of plants and animals.
A student filled two Petri dishes with a clear cornstarch gel, then marked the letter
Answers
On which continent were fossils of both Glossopteris and Lystrosaurus discovered?
MARK BRAINLIEST PROMISED!
Answers
Answer:
Antartica
Explanation:
I played the quiz and got it right!
Answer:
Antarctica and Africa
(or C if taking Edge)
Explanation:
Lystrosaurus fossils are only found in Antarctica, India, and South Africa. ... The Glossopteris fossil is found in Australia, Antarctica, India, South Africa, and South America—all the southern continents.
6. Examine the specimen in the photograph below. a. Explain the origin of the two circular openings on this specimen. ____________________________________________________________ b. Tell what sort of organism most likely made these circular openings, and why they are located in this particular place on the specimen. ____________________________________________________________ ____________________________________________________________ c. What might have caused the light-colored circular patches near the top edge and on the left side of this specimen
Answers
18 Which of the following is NOT
type of radiation from the Sun?
A. ultraviolet waves
B. television waves
C. radio waves
D. x-ray waves
Answers
characteristics of contaminated water
Answers
Contaminated water is a type of water that is harmful to human beings due to the presence of harmful substances, pollutants, or impurities that make the water unsafe for drinking or other household uses. The characteristics of contaminated water can be identified through various indicators, which can either be physical, biological or chemical.
Physical indicators are visible and may include color, taste, and odor, while biological indicators are not visible and may include bacteria, viruses, and protozoa. Chemical indicators may include heavy metals, pesticides, and organic compounds, among others.
Physical Characteristics: Physical characteristics of contaminated water include cloudy or turbid appearance, unusual taste or odor, or discoloration of the water. The color may range from yellow to brown, blue to green, or even black.
Biological Characteristics: Biological characteristics of contaminated water include the presence of bacteria, viruses, or protozoa. These microorganisms can cause diseases such as diarrhea, typhoid, cholera, and dysentery.
Chemical Characteristics: Chemical characteristics of contaminated water include the presence of heavy metals such as lead, arsenic, or cadmium. Pesticides and fertilizers can also contaminate water and affect human health. Organic compounds like benzene and toluene can also be present in contaminated water, which can lead to health problems such as cancer and nerve damage.
Therefore, it is important to test water sources regularly to identify and monitor any contaminants that may be present. This can help prevent health problems associated with the use of contaminated water.
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Select the best answer for the question.
16. Identify the appropriate mixed number for the picture shown.
O A. 1 1/4
O B.1/4
O C.4/5
O D.5/4
Answers
The mixed number for the given picture is 1 1/4, the correct option is A.
What are mixed numbers?A mixed number is one that manages to combine a whole number and an appropriate fraction.
To transform mixed numbers to improper fractions, follow these three steps: Multiply the numerator by the whole number.
Step 1 is to the numerator, add the answer from. Step 2 is adding the numerator to the product got from step 1.Step 3 is writing the improper fraction with the sum got from step 2 in the numerator/denominator form.In the given picture, there is one box completely filled and one forth portion in second block is filled, so it is representing mixed number i.e., 1 1/4.
Thus, the correct option is A.
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PLEASE HELP ASAP, LAST QUESTION
Which groups contain BOTH primary and secondary consumers?
Answers
There are different forms of energy and one form of energy can be converted into another. When we light a wax candle, the process is highly exothermic and on burning, the chemical energy of the wax gets converted into heat and light. A good source of energy is to be selected for the choice of work to be done. In ancient times, wood was the most common source of heat energy. We, in our daily lives, use various energy sources for doing the work. Nowadays we use diesel and electricity to run trains. We also use fossil fuels in vehicles which has some serious disadvantages, mainly air pollution. The recent example of air pollution was ‘Smog’ in the National Capital Region of Delhi. This pollution was a result of burning ‘Parali’ in northern states of the country, which affected the eyes and also caused serious respiratory problems.
4(a) State the energy conversion that takes place when we light a wax candle. 1
4(b) List two criteria of selecting a source of energy for a specific work. 1
4(c) Write the names of two fossil fuels. 1
4(d) why are we looking at alternate sources of energy? 1
Answers
Answer:
shiii tbh thats hard
Explanation:
When contrasting the neuroimaging scans of the brains of normal people and those with schizophrenia, it has been found that people with schizophrenia had enlarged brain ventricles developmental cascade hypothesis loosening of associations increased assertive communication
Answers
I apologize for the confusion, but there seems to be a mix of different concepts and statements in your sentence. Neuroimaging studies have indeed revealed differences in brain structure and activity between individuals with schizophrenia and those without the disorder, but the specific factors you mentioned are not all directly related to these differences. Let's break down each concept separately:
1. Enlarged brain ventricles: It is true that some studies have found that people with schizophrenia may have enlarged brain ventricles. Ventricles are fluid-filled spaces in the brain, and their enlargement can be an indication of reduced brain volume in certain regions.
2. Developmental cascade hypothesis: The developmental cascade hypothesis is a theoretical framework that suggests that early disruptions in brain development and functioning may lead to cascading effects that contribute to the development of schizophrenia later in life. It proposes that abnormalities in brain circuits and networks can impact various cognitive, emotional, and behavioral processes.
3. Loosening of associations: Loosening of associations refers to a symptom of schizophrenia characterized by disorganized thinking and difficulty maintaining logical and coherent connections between thoughts and ideas. It can manifest as speech that jumps from one topic to another without clear connections.
4. Increased assertive communication: While assertive communication is a general communication style characterized by expressing one's needs, opinions, and feelings in a respectful and direct manner, it is not directly associated with schizophrenia. Communication difficulties, such as disorganized speech or decreased verbal fluency, are more commonly observed in individuals with schizophrenia.
It's important to note that understanding schizophrenia and its underlying neural mechanisms is a complex and ongoing area of research. Neuroimaging studies have contributed valuable insights into the brain differences associated with schizophrenia, but the disorder involves multiple factors and is not solely characterized by any single abnormality or symptom.
Draw a geologic feature with at least three layers that demonstrates the principle of lateral continuity.
Answers
A geologic feature with at least three layers that demonstrates the principle of lateral continuity is called a Grand Canyon.
According to the lateral continuity concept, sedimentary rock strata were formerly continuous over wide areas. As a result, any layer discontinuities must be the result of erosion or other geologic processes.
The layers in this sketch are continuous laterally, which means they extend in all directions while holding onto their thickness and makeup. We can presume that the layers go farther in all directions even though we can only see a small section of them in this sketch. This is significant because it enables geologists to link the age and make-up of distinct rock layers.
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Photosynthesis is the process in which _____ from the sun is converted into chemical energy in a molecule of _____.
Answers
light energy; molecule of glucose (chemical energy & glucose is a sugar)
9. Which is NOT a perspective of old-school psychology?
O humanism
O psychoanalysis
O multiculturalism
O behaviorism
Answers
multiculturalism
this may help uh :-)
How do the vacuoles and cytoplasm contribute to maintaining homeostasis in a cell?
Answers
Answer:
Vacuoles regulate the turgidity by regulating the amount of water inside the cell. cell has excessive water: vacuole absorbs the water and then diffuses it out of the cell. cell lacks water: water from the vacuole gets passed back into the cell thereby maintaining turgidity
Which heat transfer(s) is responsible for heating air masses closest to Earth's surface (land)?
I. Convection
II. Conduction
III. Radiation
OI, II, and III
O I and II
Oll and 111
O I only
Answers
Explanation:
the answer is iii radiations
Answer:
ll. Conduction
Explanation:
Conduction, radiation and convection all play a role in moving heat between Earth's surface and the atmosphere. Since air is a poor conductor, most energy transfer by conduction occurs right near Earth's surface. Conduction directly affects air temperature only a few centimetres into the atmosphere.
What statement is TRUE about Earth's moon?
A. The same side of the moon is always facing Earth
B. Moonlight is caused by chemical reactions on the moon's surface
C. The moon phases are caused by weather on the moon
D. The moon always looks the same from Earth
Answers
Answer:
It is A my man can I please have brainest
For each of the four major biomolecules, identify the name and structure of its monomer
Answers
Answer:
Carbohydrate - monosaccharides
Lipids - fatty acids and glycerol
Proteins - amino acids
Nucleic Acids - nucleotides
Explanation:
An allosteric enzyme differs from a Michaelis-Menten enzyme because the allosteric enzyme:_______
Answers
Answer:
Because an allosteric enzyme has multiple active sites
Explanation:
an allosteric enzyme has multiple active sites because it cause a modification binding of an allosteric effector at a certain site which is not the active site. It has multiple active site in which the binding of an active site can affect it's affinity with other active site.
When you graph velocity versus time (a velocity-time graph), what variable is
on the y-axis?
A. Velocity
B. Acceleration
c. Displacement
D. Time
Help pleaseee
Answers
Answer:
i dont know
Explanation:
i really dont know im just a 12 year old kid struggling with math
Which is one of the three domains?
Animalia
Eukarya
Protista
viruses
Answers
Answer:
B) Eukarya
Explanation:
The three domains are the Archaea, the Bacteria, and the Eukarya.