Answer:
B
Explanation:
B is correct because the hormone oxytocin is doing something beneficial for both mom and baby, and will stop once the labor is over.
True/false, if false explain why the conducting cells of phloem are thin-walled, metabolically active sclerenchyma cells.
Phloem transports the food which formed in leaves during photosynthesis .
Describe the structure of phloem.The many components of phloem include companion cells , seive tubes , phloem parenchyma and phloem fibres . Sugar and nutrients are moved up and down the plant's seive cells using sieve tubes. Companion cells manage the seive tube's Operation. Phloem parenchyma gives the plant its mechanical sturdiness.
The phloem sclerenchyma is comprised of sclerenchyma cells that are rather associate with providing mechanical support than conducting materials. It includes the phloem fibres and the sclereids.
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For a fictional neuron, the nernst potential of the mg2 ion is 30 mv. Given this information, where is the ion more highly concentrated?
If the fictional neuron has a resting membrane potential of -70mV then Mg2+ concentration should be higher outside the cell so that it can contribute positive charge outside the cell. Therefore the correct option is (2) Mg2+ is at a higher concentration outside the cell.
The resting membrane potential (RMP) of the hypothetical neuron must be taken into consideration in order to establish whether the concentration of magnesium is higher within or outside the cell.
Since RMP is always negative, this conclusion follows. The electric potential of the cell, or resting membrane potential, is brought on by ions entering and exiting the cell.
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Question correction:
For a fictional neuron, the Nernst potential of the Mg2+ ion is +30 mV. Given this information, where is the ion more highly concentrated?
Mg2+ is at a higher concentration inside the cellMg2+ is at a higher concentration outside the cellThere is not enough information to determine the answerDuring bronchoconstriction, the smooth muscle that lines the bronchial passages contracts, resulting in a decrease of the internal diameter of the airway and an increase of:________
During bronchoconstriction, the smooth muscle that lines the bronchial passages contracts, resulting in a decrease of the internal diameter of the airway and an increase of____resistance to airflow ____
What is bronchoconstriction ?When the smooth muscle around the bronchi and bronchioles constricts, wheezing and shortness of breath result.
When the muscles lining the airways become tense, the process of bronchoconstriction begins. Your airway narrows as a result of the bronchi and bronchioles being squeezed. Numerous airway stimuli can constrict the airway in sensitive patients.Bronchodilators are typically the first step in bronchospasm treatment. There are several ways to get this drug, including pills, nebulizer solutions, and inhalers. In more serious situations, your doctor could advise taking steroids to lessen airway inflammation.Learn more about Bronchi here:
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Wong found three unknown substances. He carried out some tests to gather their properties. See his data below. Use his data to classify each substance.
Substance A: metal, non metal or metalloid
Substance B: metal, non metal or metalloid
Substance C: metal, non metal or metalloid
The metals are to the left of the line except for hydrogen, which is a nonmetal the nonmetals are to the right of the line, and the elements immediately adjacent to the line are the metalloids. When elements combine to form compounds, there are two major types of bonding that can result.
Luster: Metals are shiny when cut, scratched, or polished.
Malleability: Metals are strong but malleable, which means that they can be easily bent or shaped.
Conductivity: Metals are excellent conductors of electricity and heat.
Metalloids share characteristics of both metals and non-metals and are also called semimetals. Metalloids are typically semi-conductors, which means that they both insulate and conduct electricity.
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In contrast to hydrogen, which is a nonmetal, the metals are to the left of the line. The elements immediately around the line are the metalloids, whereas the nonmetals are to the line's right. There are two main bonding types that may develop when components come together to form compounds.
When metals are chopped, scraped, or polished, they take on a glossy appearance.
Metals may be easily twisted or moulded because of their malleability, despite their strength.
Excellent heat and electrical conductors, metals are known for their high conductivity.
Semimetals, also known as metalloids, are substances that exhibit traits of both metals and non-metals. Metalloids are often semi-conductors, which implies that they can both conduct electricity and act as an electrical insulator.
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The polar nature of water and the hydrogen bonds it can form contribute to what properties of water? Choose all that apply.
The ability to moderate temperature
High surface tension
Cohesion and adhesion
Expanding when frozen
Excellent solvent
The polar nature of water and the hydrogen bonds it can form contribute to Cohesion and adhesion properties of water.
What is polar nature?Polar compounds can be described as the chemical compounds which do contains the polar covalent bonds as the bond that is found between the molecule and this is what is found in the water.
It should be noted that the polar compound serves as the chemical species that the bond in them is the covalent bonds in the case above , polar nature of water and the hydrogen bonds it can form contribute to Cohesion and adhesion properties of water.
Therefore, option C is correct.
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A bacterium that lives in the human intestine derives its nutrition by digesting the contents of the intestine. Which mode of nutrition best describes this bacterium?.
Answer:
Heterotrophic
Explanation:
As they consuming the food inside our intestines, they are showing heterotrophic mode of nutrition which is the most common mode of nutrition found in kingdom monera.
Detailed comparison of the human and chimpanzee genomes has revealed that __________
Detailed comparison of the human and chimpanzee genomes has revealed that they have very similar proteins.
The human and chimpanzee genomes encode proteins that are remarkably similar to one another. Nearly 99 percent of the DNA sequence that can be directly compared between the two genomes is the same. Humans and chimps still have 96 percent sequence identity after accounting for DNA insertions and deletions. In chimpanzees and humans, 29% of the genes that code for amino acids are the same at the protein level. In actuality, since chimpanzees and humans split off from a common ancestor roughly 6 million years ago, the average human protein has only undergone one distinctive modification.In comparison to other mammals, a few types of genes are evolving in humans and chimpanzees at an extraordinarily fast rate. These kinds of genes include those that are involved in nerve signal transmission and sound perception.Therefore, human and chimpanzee genomes has similar proteins.
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4. Which of these determines what types of organisms live in water? E. water temperature F. oxygen levels of the water G. sunlight and nutrients H. water temperature, oxygen levels, sunlight, and nutrients
Answer:
H all of the determinants are essential to whether or not organisms can survive.
In Town X, the water has heavy metal M. In Town Y, the water has heavy metal N. Residents of both towns drink the water with no issues.
However, in Town Z, the water has both metal M and N; and the residents have long-term kidney damage. What conclusion can be made about the two metals?
O More metals cause acute effects but not chronic effects.
O The first metal causes an acute effect compared to the other
O The heavy metals have a synergistic relationship when combined
The heavy metals have an antagonistic relationship when combined.
In Town Z, the water has both metal M and N; and the residents have long-term kidney damage. The conclusion can be made about the two metals is that the heavy metals have a synergistic relationship when combined.
According to reports, the combined neurotoxic effects of two separate heavy metals are substantially greater than the effects of just one alone.
Neurotoxicity occurs when the normal operation of the central nervous is affected by exposure to hazardous substances (neurotoxicants). Neuronal cells that transmit and process different parts of the brain and other regions of a nervous system may therefore suffer harm or even perish.
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The difference in dosage of genes on the x chromosome between the two sexes in humans is resolved by ____________ expression of the x-linked genes in ____________.
The traits or expression of the x-linked genes in the X chromosome helps to explain the difference in the dosage of genes on the X chromosome between the two sexes in humans.
What is a chromosome?A chromosome is a long DNA molecule that contains all or a part of an organism's congenital principle. Histones, which serve as packing proteins for the majority of eukaryotic chromosomes, work with chaperone proteins to attach to and condense the DNA molecule in order to preserve the integrity of the molecule. A component that can be found in a cell's nucleus. Proteins and DNA are arranged into genes on a chromosome.Extended pieces of DNA are carried by chromosomes, which are organelles that can be found in the nucleus of cells. The meaning that houses genes is called DNA. It serves as the foundation for the human body. Also, proteins located in chromosomes aid in the proper structure of DNA.To learn more about chromosome, refer to:
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Based on similarities among forelimbs, what bones did the common ancestor of tetrapods probably possess? in your answer, refer to the bones and how they are connected to each other.
The bones possessed by the common ancestor of tetrapods in forelimbs were the humerus, radius, ulna, carpals, metacarpals, and phalanges.
When we compare anatomy and morphology, we find certain similarities and differences between the organisms that exist today and the organisms that existed several years ago.
Humans, bats, cheetahs, and whales all have the same origin as well as same basic structure of the skeleton but those structures have been modified due to the adaptation to the environment in which they live.
The forelimbs of whales are modified into flippers for swimming while the forelimbs of bats are modified into wings to facilitate their flight.
In the above case, the forelimbs are homologous organs.
Homologous organs are those organs that have a common origin but different functions.
They represent common ancestry.
Thus, the bones possessed by the common ancestor of tetrapods in forelimbs were humerus, radius, ulna, carpals, metacarpals, and phalanges.
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The e. coli chromosome contains 4,641,652 bp. how many turns of the double helix must be unwound during replication of the e. coli chromosome? number of turns:
The complementary strands of the genome must unwind completely during DNA replication to allow the creation of a new strand on each template.
The number of helical turns equals the number of base pairs divided by the of base pairs per helical turn. As a result, 4.64 x 106/10 = 4.64 x 105 turns must be unraveled.E. coli has a single circular chromosome that is 4.6 megabases long and contains a single replication origin (oriC).E. coli has a single circular 4.6-Mbp chromosome on which replication begins once per creation from a single replication origin and progresses bidirectionally, aborting in a specific replication termination region.E. coli only have one circular chromosome, which is accompanied by a circular plasmid. Lab researchers have completely sequenced its chromosomal DNA.Learn more about DNA here:
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An ophthalmoscope is an instrument used to visually examine the external ear canal and tympanic membrane.
a. true
b. false
An ophthalmoscope is an instrument used to visually examine the external ear canal and tympanic membrane.- FALSE
A device called an otoscope is used to examine the ear canal. While peering into the otoscope, the ear speculum (a cone-shaped viewing portion of the otoscope) is slowly put into the ear canal. An otoscope is a device that projects a beam of light to aid in examining the eardrum and ear canal. The reason of symptoms like an earache, a feeling of fullness in the ear, or hearing loss can be identified by looking within the ear.The size of an ophthalmoscope is comparable to a flashlight and is used for eye examination. The device allows the doctor to see the back of the eyeball because it has a light and many microscopic lenses.learn more about ophthalmoscope here: https://brainly.com/question/28095644
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What is the conductance of a 1.0-mm-diameter, 10-cm-long blood vessel filled with blood?
The conductance of the blood vessel is 4.91× 10-6 ohm⁻
Given, here the length of blood vessel, L = 10cm.and the diameter, D = 1mm or 0.1 cm
Then, radius is equals to 0.1/2 = 0.05cm
Now, we calculate cross sectional area, which equals to πr2
A=πr² = π(0.05)²
We know that , the resistivity of blood ties between 80 ohm cm to 240ohm cm.
Therefore, The average resistivity, ρ= 80+240/2ohm cm = 160ohm cm.
Now, we calculate the resistance of the blood by the formula,
R= ρ l/A
R= 160ohm cm × 10cm/ π × (0.05) 2
R= 1600/ 7.854× 103cm2
R= 203.72× 103 ohm.
Now, we caclulate conductance and we know that it is reciprocal of resistance.
So, The conductance is, G= 1/R
G= 1/203.72× 103 ohm.
G= 4.91× 10-6 ohm⁻
Any conductor, including a lightbulb, will block the flow of an electric current; this obstruction is known as electrical resistance and is represented by the letter R. Conductors emit heat when current flows through them because all materials have an electrical resistance.
Conductance is defines as the reciprocal of the electrical resistance . It is denoted by G and it’s unit is ohm- (ohm minus).
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How much, in centimeters, would the average human fingernail grow in one year? you may use a calculator. 4.164 416.4 41.64 0.347
As a broad rule, human fingernails grow between 0.5 inches (1 cm) and 4 inches (10 cm) per year, and several items can affect this growth rate.
Where do fingernails originate?Under the cuticle, at the nail root, nails are formed. The old nail cells are pushed out as the fresh nail cells at the nail's root grow. In order to flatten and harden, these aged cells produce keratin, a protein. After that, the freshly produced nail moves along the nail bed, the smooth area under your nails. Human fingernails typically develop at a pace of about 0. Toenails typically grow at a rate of 1.6 mm (0.063 in) each month, which is about half as fast as fingernails at 3.5 mm (0.14 in) per month. Toenails take twelve to eighteen months to fully regrow, whereas fingernails take three to six months.To learn more about human fingernail grow, refer to:
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An amino acid is of of central carbon atom with 4 components attached to it. Which component makes each amino acid unique?
Single hydrogen atom
Amino Group
R Group
Carboxyl Group
FILL IN THE BLANK HELP!! 15 POINTS!
Density is a physical property that measures the _________ per given ________of a solid liquid or gas.
Density is most commonly used for determining how different ________ interact with one another.
Objects will _______ densities will generally float above objects with ________ densities.
Explanation:
-Mass per given unit volume
-substance
-less and more
The foot of a ladder should be ________ from the base of the structure from which it is leaning.
The foot of a ladder should be 1/4 working length from the base of the structure from which it is leaning.
What are extension ladders?Extension ladders are two-section ladders that use brackets or guides to allow the ladder to be used at various adjustable lengths.Extension ladders are not self-supporting and must be secured to a stable structure.Make sure the ladders are on a firm surface, that the surface is level, and that the footing is secure.Before climbing, make sure the locking ladder hooks are secure. Aluminum is the lightest and least corrosive option. Aluminum ladders are not recommended for electrical work or use near power lines because they are among the most effective conductors of electricity. Fiberglass ladders are heavier than aluminum ladders, but they are stronger and more versatile.To know more about ladders:
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Look at the glycerol molecule. Its chemical formula is...
A. C6H12O6
B. C12H22011
C. C3H8O6
D. C3H8O3
The correct chemical formula for Glycerol is option D. [tex]C_{3} H_{8} O_{3}[/tex]
A naturally occurring alcohol is glycerol. It is an odorless liquid that is employed as a medication, solvent, and sweetener.Glycerol pulls water into the intestines when it is present, softening stools and easing constipation. Glycerol draws water so that it stays in the body for a longer period of time when it is present in the blood. An athlete may be able to exercise longer as a result.In numerous personal care products like toothpaste, mouthwashes, shaving cream, and soaps, glycerol is utilized as an emollient, humectant, solvent, and lubricant. AAdditionally, the pharmaceutical industry uses glycerol because of its hygroscopic qualities to stop lotions and ointments from drying out.So, the correct chemical formula for Glycerol is option D. [tex]C_{3} H_{8} O_{3}[/tex]
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If you ate a spoonful of peanut butter for breakfast, the majority of the energy would come from the _________ in the peanut butter because it _________.
A. carbohydrate; contains a low ratio of oxygen atoms.
B. protein; contains nitrogen in place of oxygen atoms.
C. fat; contains a low ratio of oxygen atoms.
D. sugar; contains high ratio of oxygen atoms.
If you ate a spoonful of peanut butter for breakfast, the majority of the energy would come from the fat in the peanut butter because it contains a low ratio of oxygen atoms.
The energy was used to describe the strength needed by the body for daily tasks, both physical and mental.
Due to the low proportion of oxygen atoms in its composition, fat is classified as a food and gives cells the energy they require. In light of this, fat was determined to be the best option.
Fat is typically defined as any ester of fatty acids or a combination of such compounds, most frequently those that occur in living things or in food, in the fields of nutrition, biology, and chemistry.
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Look carefully at the model. Plants take in the increased ground water and use the water for photosynthesis. Plants also release water into the atmosphere as a by-product of cellular respiration. What process returns the water to the water cycle (#5 in diagram)?
a
Condensation
b
Precipitation
c
Synthesis
d
Transpiration
Answer:
Transpiration
Explanation:
I study geography and biology and Water movement in plants is called Transpiration and water evaporation form plants in geography is called evapo-transpiration. Therefore, Transpiration is your answer
Write a letter to inform a potential astronaut, or the family members of an astronaut, about what to expect during a year long mission to space. In your letter explain to them how their body (or their family member's body) will react to being in zero-gravity. Compare the normal functions of the immune system and the lungs and the respiratory system with how they would be altered during space travel, describing what they should expect so that they can prepare for their yearlong mission.
Answer:
Explanation:
Space travellers go through a range of often unpleasant feelings: they feel dizzy, sleepy and weak, suffer from loss of appetite and stomach upsets and lose their sense of time and space. Fortunately, after few days, their bodies adapt to weightlessness and astronauts start to feel both calm and euphoric...
Cytokinesis describes the movement of a cell?
true
false
Why doesn’t science "prove” things? What term should be used instead, and why? Read the article to help you answer this question
Answer: Sometimes people think that the result of one of these tests is proof that an idea is correct. However, scientists don’t “prove” things. Science can only provide evidence for or against an idea. The evidence is gathered from investigations and research.
Explanation: EDGE 2023
When sperm and ovum unite at conception, the resulting _____________ will again have 46 chromosomes.
How many copies of the dna sequence that uases albinism will be present in tawa's cells?
2 copies of the DNA sequence that uses albinism will be present in tawa's cells.
Albinism disease is having 2 copies of the DNA sequence which is present in tawa's cells and is actually caused by impaired production of the polymeric pigment melanin. Melanin production is tightly regulated in the body and occurs in specialized ectodermal-derived cells called melanocytes.
Melanocytes may be cutaneous (hair, skin) or extracutaneous (eye, cochlea), each deriving from a distinct ectodermal lineage. The clinical nomenclature for albinism is complicated by the fact that the terms albinism, ocular albinism, and oculocutaneous albinism can be used both as a phenotypic description and as references to specific syndromes. Missing heritability is likely larger among patients with partial albinism than among those with complete albinism.
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i need help with all of the blank questions please answer wtv u know
During strenuous exercise, anaerobic conditions can result if the cardiovascular system cannot supply oxygen fast enough to meet the demands of muscle cells. Assume that a muscle cell’s demand for atp under anaerobic conditions remains the same as it was under aerobic conditions. What would happen to the cell’s rate of glucose utilization?.
During strenuous exercise, anaerobic conditions can result if the cardiovascular system cannot supply oxygen fast enough to meet the demands of muscle cells. Assume that a muscle cell’s demand for ATP under anaerobic conditions remains the same as it was under aerobic conditions. Under such circumstances, the cell's rate of glucose utilization would increase a lot.
In the field of science, aerobic respiration is a kind of respiration in which glucose is broken down to release energy in the presence of oxygen. However, if oxygen is not present, then the breakdown of glucose during such circumstances is referred to as anaerobic respiration.
There are 38 molecules of ATP that are formed as a result of aerobic respiration. As a result of anaerobic respiration, only 2 ATP molecules are formed. Hence, if a muscle cell's demand for ATP remains the same in aerobic and anaerobic respiration, then an excessive amount of glucose will be used to meet the requirement in anaerobic conditions.
Although a part of your question is missing, you might be referring to this question:
During strenuous exercise, anaerobic conditions can result if the cardiovascular system cannot supply oxygen fast enough to meet the demands of muscle cells. Assume that a muscle cell's demand for ATP under anaerobic conditions remains the same as it was under aerobic conditions.
What would happen to the cell's rate of glucose utilization?
a) Glucose utilization would increase a lot.
b) Glucose utilization would increase a little.
c) Glucose utilization would remain the same.
d) Glucose utilization would decrease a lot.
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A/An ___, such as NADH, carries electrons and is needed for both the Krebs Cycle and ETC.
pyruvate
organelle
coenzyme
gas
A co-enzyme such as NADH carries electrons needed for both the Krebs cycle and Electron transport chain. Thus, the correct option is C.
What is Co-enzyme?Coenzymes are the organic compounds which are required by many of the enzymes for their effective catalytic activity. Coenzymes are often vitamins, or their derivatives. Sometimes they can also act as catalysts in the absence of enzymes required for the chemical reaction, but these are not so effective as when used in conjunction with an enzyme.
While enzymes are proteins in nature, coenzymes are small, nonprotein molecules which bind to the proteins and enhance their activity. Coenzymes hold an atom or group of atoms together, allowing the enzyme to work effectively. Examples of coenzymes include vitamin B complex and S-adenosyl methionine.
Therefore, the correct option is C.
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compare & contrast the three types of blood
vessels
Answer:
Arteries carry blood away from the heart, and veins carry blood towards the heart. With the exception of pulmonary blood vessels, arteries carry oxygenated blood and veins carry deoxygenated blood. Arteries have thick walls with muscle tissue. Veins have thinner walls and use valves to keep your blood flowing.
