why are interstellar absorption lines so much thinner than stellar absorption lines?
Answers
Interstellar absorption lines are thinner than stellar absorption lines because they are produced by a less dense and cooler gas as compared to stars.
What are interstellar absorption lines?
Interstellar Absorption Lines One of the simplest ways to detect cold interstellar gas clouds is by taking spectra of distant stars.
These spectra will show the absorption lines indicative of the spectral type of the star, but may also contain additional absorption lines if the light has passed through gas along the way to our detectors.
Interstellar absorption lines are dark lines observed in the spectra of stars that are caused by the absorption of light by gases and dust in the interstellar space between the star and the observer.
Interstellar absorption lines are thinner and narrower than the absorption lines produced by the stars because the interstellar gas is cooler and less dense than the gas in the stars.
Hence, it absorbs a smaller range of wavelengths, making the lines thinner.
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Related Questions
1. describe the negative feedback loop that controls the rate of erythropoiesis. under what circumstances would you expect the rate of erythropoiesis to be increased?
Answers
Erythropoiesis is regulated through a long-range negative feedback loop, whereby tissue hypoxia stimulates erythropoietin (Epo) secretion, which promotes an increase in erythropoietic rate.
Erythropoietin (Epo) is a glycoprotein hormone produced in the kidney that acts on erythroid progenitor cells in the bone marrow. A negative feedback system, in which tissue oxygenation controls Epo production and Epo controls red blood cell (RBC) production, provides homeostasis in oxygen delivery to body tissues.
under these circumstances you expect the rate of erythropoiesis to be increased:
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Mendel is considered the Father of Genetics. His famous pea plant experiments helped to formulate several laws in genetics that have
stood the test of time with very little modification. Match each law or term with the correct description/definition.
Answers
Answer:
The Principles Of Mendel's Genetics
1.Law of Segregation
2.Law of independent assortment
3.Law of dominance
4.Recessive Allele
5.Co-dominance
6.Incomplete Dominance
Explanation:
The Law of Segregation, often known as Mendel's First Law, stipulates that two alleles for a trait segregate during the production of gametes, resulting in each gamete having just one copy of each allele.
What is an explanation of the concept ?This concept explains why a cross between two animals with dissimilar features, such as flower colour, can occasionally result in an intermediate phenotype in the progeny.
Mendel's Second Law, or the Law of Independent Assortment, states that the inheritance of one feature is not reliant upon the inheritance of another trait. This concept explains why a cross between two animals with dissimilar features can result in offspring that exhibits every feasible combination of the two qualities.
Mendel's research with pea plants was groundbreaking in thea branch of genetics. His thorough research and tests resulted in the development of two laws that are now the cornerstones of genetics. According to the Law of Segregation, two alleles for a trait separate from one another throughout the development of gametes, leaving just one allele per trait in each gamete.
This concept explains why a cross between two animals with dissimilar features, such as flower colour, can occasionally result in an intermediate phenotype in the progeny.
According to the Law of Independent Assortment, one trait's inheritance is not correlated with that of another. This law explains how a cross between two creatures with distinct features can result in offspring that can display any combination of the traits.
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What releases acetylcholine at ganglia and Target?
Answers
Acetylcholine is released by preganglionic neurons on postganglionic neurons, which are typically found close to the target organs. Despite some also releasing nitric oxide, postganglionic neurons typically release acetylcholine onto their target organs.
Neurochemical acetylcholine performs a wide range of tasks throughout the body's organ systems, including the brain. More specifically, it is a neurotransmitter that is produced by neurons and functions as a chemical message that enables communication between neurons and other specialised cells like myocytes and cells in glandular tissues. Cholinergic tissues are those in the body that employ or respond to this chemical messenger. A group of substances known as anticholinergics also prevent acetylcholine from acting on tissues. Although ACh functions as a neurotransmitter throughout the body, it is most frequently connected to the neuromuscular junction.
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What is the name of the process that occurs when a plant loses too much water by transpiration and is unable to replace it?
Answers
Answer:
wilting
Explanation:
When plants lose excess water than its rate of absorption, wilting takes place. When wilting occurs, cells of the plants lose water and are not able to operate properly. When the conditions are dry, hot and in summer, the rate of water evaporation is rapid.
I hope it helps.
Wilting occurs when plants lose more water than they can absorb. Plants wilt when their cells start to lose water and become unable to function properly. The rate of water evaporation is quick when the weather is hot, dry, and summer.
What process that occurs, plant water by transpiration?Wilting is the lack of stiffness in plant parts that are not made of wood. This happens when the amount of water in non-lignified plant cells decreases, causing the turgor pressure to approach zero. Wilting reduces water loss by making the leaves' exposed surface area smaller.
Plants wilt as a result of moisture loss through their leaves. The transfer of water from the roots through the entire plant, including the leaves, is a natural process known as transpiration.
Therefore, wilting process that occurs when a plant loses too much water by transpiration and is unable to replace it.
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What type of nucleic acid is composed
of only one strand of nucleotides?
A. Sugar
B Fat
C DNA
D RNA
Answers
Answer:
option D is correct
Explanation:
RNA is a type of nucleic acid which is composed of single strand of nucleotide
Help asppp!!
Based on early observations, including those in the
table below, scientists proposed that the continents
were once together but had drifted apart. However,
scientists could not identify anything that would make
them move. New technology, such as a worldwide
network of earthquake detectors, led to new
observations. Then scientists proposed that Earth's
surface was divided into tectonic plates that would
move as a result of forces linked to earthquakes and
the formation of new ocean floor.
Early Observations
Coastlines of Africa and South
America seem to fit together.
Similar fossils have been found in
both continents.
New Observations
Most earthquakes and volcanoes
occur along certain lines.
A mountainous ridge down the
center of the Atlantic Ocean
formed new ocean floor.
How are continental drift and plate tectonics related?
O Continental drift was the hypothesis that led to the
theory of plate tectonics.
O Continental drift was the theory that became the law
of plate tectonics.
O The theory of continental drift was modified based
on the new observations to become the theory of
plate tectonics.
O The theory of continental drift was proven false, and
the law of plate tectonics took its place.
Answers
How do you know that you are touching a leaf when with your eyes closed?
Answers
By touch sensation we identify the leaf with closed eyes.
When we touch an object we are able to identify the object because of the memory retained in our brain from previous touch.
The nervous tissue responds to the touch stimuli.
Astereognosis is the inability to identify an object by active touch of the hands without visual or sensory information. An individual with astereognosis is unable to identify objects by handling them, despite intact elementary tactile, proprioceptive, and thermal sensation.
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Oxygen is consumed in the mitochondria during oxidative phosphorylation. What is the fate if this oxygen
Answers
Oxygen is consumed in the mitochondria during oxidative phosphorylation. What is the fate of this oxygen? Oxygen can be reduced to water by electron respiratory chain. You just studied 8 terms!
All nervous tissue is made up of nerve cells or _______. These transmit high-speed signals called ______ which can be thought of as being similar to an electric current.
Word bank: electrical impulses, dendrites, nerve impulses, axons,neurons
Blank 1:
Blank2:
Answers
Following are the answers:
Blank 1: neurons
Blank 2: nerve impulses
What is a nervous tissue?Nervous tissue is a type of tissue that is found in the nervous system, which is responsible for the control and coordination of the body's functions. It is made up of two main types of cells: neurons and neuroglia.
Neurons are the primary cells of the nervous system. They are responsible for transmitting electrical signals, also known as nerve impulses, throughout the body. They have specialized structures such as a cell body, dendrites, and axons. Dendrites receive signals from other neurons and the axon transmit signals to other neurons.Neuroglia, also known as glial cells, are non-neuronal cells that provide structural and metabolic support for the neurons. They help to maintain the environment of the neurons and to protect them from injury. They also play a role in the formation of the blood-brain barrier and in the removal of waste products from the nervous system.Learn more about nervous tissue, here:
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when a compound changes the shape of an enzyme by binding to it, and consequently the substrate cannot enter the active site, the compound is called a(n) . when a compound changes the shape of an enzyme by binding to it, and consequently the substrate cannot enter the active site, the compound is called a(n) . noncompetitive inhibitor competitive inhibitor steroid proenzyme coenzyme
Answers
When a compound changes the shape of an enzyme by binding to it, and consequently the substrate cannot enter the active site, the compound is called a noncompetitive inhibitor.
What is known as enzymes?Biological polymers that catalyse biochemical reactions are what are known as enzymes.
Most enzymes are proteins having catalytic properties that are essential to carry out various operations. A group of enzymes that are essential for maintaining life carry out metabolic processes and other chemical reactions within the cell.
Where are enzymes made?The pancreas, small intestine, and stomach all produce digestive enzymes. The "powerhouse" of enzymes for digestion is actually the pancreas. The most vital digestive enzymes—those that liquefy fats, proteins, and carbohydrates—are produced by it.
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I understand that the question you are looking for is:
A compound that binds to the surface of an enzyme, and changes its shape so that a substrate cannot enter the active site, is called a(n)
A) irreversible inhibitor.
B) proenzyme.
C) cofactor.
D) noncompetitive inhibitor.
E) competitive inhibitor.
If you had a loss of function in the antennapedia gene, what phenotype would you expect?.
Answers
The expected phenotype would be A fly with no legs.
Diverse transcription beginning sites produce structurally different RNAs in the Drosophila melanogaster Antennapedia gene. Transcripts are generated from each piece of the split Antp locus when the two locations are separated by a chromosomal inversion, and these RNAs start at the same nucleotide as in animals of the wild type.
Therefore, separate promoters control the initiation sites. By using in situ hybridization, we demonstrate that transcripts from each promoter accumulate in a subset of wild-type imaginal discs in a manner that is geographically different. It's significant that the inversion mutant generally maintains these patterns.
We come to the conclusion that the promoters have separate and unique regulatory elements for spatial activation. Last but not least, we examined transcription in seven distinct dominant Antp mutants, all of which exhibit head transformation tissue to thoracic tissue.
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What are some intrinsic characteristics of endangered species that makes it difficult for them to rebound in a changed environment
Answers
The charactistics that make it difficult for endangered species to rebound include;
The habitat is significantly changedOver exploitation of the speciesPollution that threatens the existence of the speciesWhat are endangered species?Endangered species are those species that are facing the threat of extinction sometimes owing to severe habitat loss or some other factors.
We must note that these characteristics that make it difficult for endangered species to rebound;
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measurements of the amount of dna per nucleus were taken on a large number of cells from a growing fungus. the measured dna levels ranged from 3 to 6 picograms (pg) per nucleus. during the entirety of which stage of the cell cycle did the nucleus contain 6 pg of dna?
Answers
Measurements of the amount of DNA per nucleus were taken on a large number of cells from a growing fungus measured DNA levels ranged from 3 to 6 picograms per nucleus.
Slight fungal skin infections can appear like a rash and are very not unusual. as an instance, ringworm is a pore and skin infection because of a fungus—no longer a trojan horse. Fungal infections over-the-counter the counter lungs can be more serious and frequently purpose signs and symptoms that are similar to different ailments, including bacterial pneumonia or tuberculosis.
Antifungal drugs can kill a fungus. Or the counter stops it from multiplying or developing. There are several classes of antifungal medicinal drugs and one-of-a-kind forms of drug treatments. Your healthcare provider will choose over-the-counter first-rate prescription medicine.
For over-the-counter, over-the-counter fungus ought to go away easily, and also you are probably capable of self-dealing with it, says Sundling. “I inform patients to buy over-the-counter cream because it's cheaper and it really works simply as well.
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3. In the diagram of a cell below, the structure
labeled X enables the cell to
2
(1) release energy
(3) control cell activities
(2) store waste products (4) manufacture proteins
4 If the ribosomes of a cell were destroved whatsoever
Answers
If the ribosomes in the cell were destroyed the cell would not be able to grow (growth and repair)
Answer:
Explanation:
In the diagram you provided, the structure labeled X is the endoplasmic reticulum (ER). The endoplasmic reticulum is a network of flattened sacs and tubes that is found within the cytoplasm of eukaryotic cells (cells that have a nucleus and membrane-bound organelles).
There are two main types of endoplasmic reticulum: the rough endoplasmic reticulum (RER) and the smooth endoplasmic reticulum (SER). The rough endoplasmic reticulum is studded with ribosomes, which are small organelles that synthesize proteins. The smooth endoplasmic reticulum, on the other hand, does not have ribosomes attached to it.
The endoplasmic reticulum plays several important roles in the cell, including:
1. Release of energy: The endoplasmic reticulum is involved in the synthesis of lipids and the breakdown of carbohydrates, which releases energy that can be used by the cell.
2. Control of cell activities: The endoplasmic reticulum helps to regulate the synthesis and transport of proteins and lipids within the cell.
3. Storage of waste products: The smooth endoplasmic reticulum is involved in the synthesis and detoxification of certain substances, such as drugs and hormones.
4. Manufacture of proteins: As mentioned, the rough endoplasmic reticulum is involved in the synthesis of proteins. Proteins are synthesized on the ribosomes attached to the RER and are then transported into the lumen (cavity) of the RER for further processing and modification.
If the ribosomes of a cell were destroyed, the cell would no longer be able to synthesize proteins, which would severely impact its function and survival.
the electrical event that begins each heartbeat occurs at the sinoatrial (sa) node. true or false?
Answers
The statement "The electrical event that begins each heartbeat occurs at the sinoatrial (sa) node" is true.
The electrical event that initiates each heartbeat occurs at the sinoatrial (SA) node, which is located in the right atrium of the heart. The SA node acts as the natural pacemaker of the heart, generating electrical impulses that spread through the atria, causing them to contract.
This electrical signal then travels to the atrioventricular (AV) node, which is responsible for conducting the electrical impulse to the ventricles, resulting in their contraction. The coordinated contraction of the atria and ventricles allows for the pumping of blood throughout the body.
Therefore, the SA node plays a crucial role in initiating the electrical activity that regulates the heartbeat.
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Energy requiring metabolic pathways that yield complex molecules from simpler precursors are: A) amphibolic. B) anabolic. C) autotrophic. D) catabolic. E) heterotrophic
Answers
Energy requiring metabolic pathways that yield complex molecules from simpler precursors are: anabolic. The correct option is (B).
Anabolic pathways are those metabolic pathways in which simple molecules are combined to form more complex molecules. These pathways require energy, usually in the form of ATP, to drive the chemical reactions that synthesize complex molecules from simpler precursors.
Anabolic pathways play an important role in building the macromolecules needed for cellular structures and functions, such as proteins, nucleic acids, and complex carbohydrates. These pathways are also involved in the storage of energy in the form of glycogen, lipids, and other complex molecules.
Examples of anabolic pathways include protein synthesis, DNA replication, and glycogen synthesis. These pathways are often linked to catabolic pathways, which break down complex molecules into simpler ones and release energy.
Together, anabolic and catabolic pathways maintain the balance of chemical reactions in the cell, allowing it to grow, divide, and carry out its functions.
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Define aerobic respiration
Answers
Answer:
a set of metabolic reactions and processes that take place in the cells of organisms to convert chemical energy from oxygen molecules or nutrients into adenosine triphosphate, and then release waste products
Explanation:
what're the two body systems opossums use to fake their death?
Answers
Apparent death, colloquially known as playing dead, feigning death, or playing possum, is a behavior in which animals take on the appearance of being dead. This form of animal deception is an adaptive behavior also known as tonic immobility or thanatosis. Apparent death can be used as a defense mechanism or as a form of aggressive mimicry, and occurs in a wide range of animals.
When induced by humans, the state is sometimes colloquially known as animal hypnosis. According to Gilman et al.,[1] the investigation of "animal hypnosis" dates back to the year 1646 in a report by Athanasius Kircher.
Opossums do not virtually play lifeless whilst they are threatened. Instead, they involuntarily input a catatonic kingdom.
Opossums, as they're generally called, are much more likely to run the alternative way, uncover their tooth, and growl in risky situations.
Playing dead is an involuntary reaction at the a part of the opossum. The strain of the war of words going through the opossum reasons him to enter surprise. This surprise induces a comatose kingdom that may remain for forty minutes.
Why ringtail Opossums don't play dead.No, ringtail Opossums they do not, they make a sound, you could concentrate on it on the subsequent post: Strange Australian Back Garden Beastie Sounds.
Therefore it is clear that they play dead by unover their tooth and growling in risky situations.
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helpppp someoneee :,)
Answers
Answer:
It should be your appendix. If not I'm sorry
Answer:
Appendix
Explanation:
Im pretty sure it's the appendix.
ileum is a part of the small instestines
Epiglottis is for eating purposes
Villi found inside the small intestine
how an atom change if all of its electrons are removed
Answers
Answer:
If all the electrons of an atom are removed, it will change to become a positively charged ion called a cation. Additionally, the loss of all of its electrons means there is no negative charge to balance the positive charges of the protons.
Explanation:
What helps substances cross the cell membrane during facilitated diffusion?
Choose 1 answer:
Cholesterol
B
Carbohydrates
Proteins
D
Water
Answers
Channel proteins act as a bridge for molecules to pass through
Proteins help substances cross the cell membrane during facilitated diffusion. Thus option C is correct.
What are proteins?Proteins are defined as large biomolecules and macromolecules and are made up of one or more extended chains of amino acid residues.
Protein play the important role in development of human body.
Proteins assist our body with cell regeneration and repair.
There are basically eight types of proteins.
Hormonal proteinEnzymatic proteinStructural proteinDefensive proteinStorage proteinTransport proteinReceptor proteinContractile proteinThus, proteins help substances cross the cell membrane during facilitated diffusion. Thus option C is correct.
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Use the image to answer the questions.
B
с
is a producer
is a consumer.
Answers
C is a consumer
A is the consumer
Write 2 paragraphs from A Caribbean island gets everyone involved in protecting beloved species
Answers
Two paragraphs about the article titled "A Caribbean island gets everyone involved in protecting beloved species" is given below:
The article makes use of narration to talk about tiny Saba, which has a dwindling coral reef that had a massive wipe-out of more than 5,000 long-spined sea urchins.
It is also stated that there was mass disintegration of the sea life there as in a matter of days, the population reduced from over 5,000 strong to just a mere hundred.
What is a Narration?This refers to the storytelling done with the aid of a narrator to describe the events in a story, the plot, settings, and conflicts in the story.
He can tell the story from the first-person narrative, second-person narrative, limited third-person narrative, omniscient narrative, etc.
He is regarded as the "eyes and the ears" of the story.
Hence, we can see that two paragraphs about the article titled "A Caribbean island gets everyone involved in protecting beloved species" is given above.
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About how many species are in the taxonomic group Kingdom Animalia?
Answers
Answer:
1,000,000 species :)
Explanation:
How is the fur color trait influenced by natural selection?
Answers
The fur color trait is influenced by natural selection as the furs which don't
blend with the environment are phased out and the ones which blend will
survive.
Fur color has a very vital advantage of protection. Animals which have furs
which blend with the environment usually become hard to see or notice by
predators thereby prolonging their lifespan and reproductive rate.
The organisms which have traits which don't blend will die while the furs
which blend with the environment will survive and be passed to future
offspring.
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7. A hen's egg with the shell dissolved is placed in a 10% salt solution. Relative
to the interior of the egg the salt solution is
A. Hypotonic
B. Isotonic
C. Hypertonic
D. Semi-permeable
Answers
The salt solution is Hypertonic.
Hypertonic fluids contain a higher concentration of solute compared to plasma and interstitial fluid.What is hypertonic solution?A solution that contains more dissolved particles than is found in normal cells and blood.Cells placed in hypertonic solution will shrink. Water moves from a high water concentration inside the cell to a low water concentration outside of the cell by osmosis.What is osmosis?Osmosis is the movement of water molecules from a solution with a high concentration of water molecules to a solution with a lower concentration of water molecules, through a cell's partially permeable membrane.Osmosis is a passive transport process during which water moves from areas where solutes are less concentrated to areas where they are more concentrated.To know more about osmosis here
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How does the plot move along in this passage based on how Charlie is changing?
Charlie is becoming smarter and smarter, so he can finally fit in.
Charlie is now so smart that he once again does not fit in with the people around him.
Charlie’s intelligence is helping him fit in with some people but not others.
Answers
Answer:
Charlie is now so smart that he once again does not fit in with the people around him.
Explanation:
i'm smart :)
Answer:
answer is B)Charlie is now so smart that he once again does not fit in with the people around him.
edg 2021
When must scientific theories be changed?
A. When a new government is elected
B. When an old scientist dies
C. When one experiment shows a surprising result
D. When enough evidence contradicts earlier ideas
Answers
Answer:Theories may be changed over time as new information is discovered or new technologies are developed.
Explanation:
The domestication of animals came before the cultivation of plants in human history
Answers
Answer:
The first attempts at domestication of animals and plants apparently were made in the Old World during the Mesolithic Period. Dogs were first domesticated in Central Asia by at least 15,000 years ago by people who engaged in hunting and gathering wild edible plants
Explanation:
1 2 3 4 5 6 7 8 9 10
The structure of DNA resembles a twisted ladder. Which structural components form the rungs of the ladder?
deoxyribose sugars
phosphate groups
nitrogenous base pairs
ribosomes
Answers
Answer:
Nitrogenous base pairs