A scientist shines ultraviolet light on a colony of blue colored bacteria. She then places colonies of the bacteria in separate Petri dishes. After
allowing the bacteria to replicate for several generations, the scientist observes that some of the dishes now contain colonies with purple and
red colored bacteria. What can be concluded from this observation?
Which type of scientific statement is defined as "a possible explanation or answer to a scientific question that is based on
prior knowledge or research and is testable"?
hypothesis
O theory
O law
O probability
A normal breath takes in about 1.0 L of air. If air has an average molar mass of 28.8 g per 1 mol and has a density of 0.97 g/mL, how many molecules of air do you take in with each breath
Taking into account the definition of density and Avogadro's Number, you take 2.0286×10²⁵ molecules of air.
What is densityDensity is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space.
In other words, density is a quantity that allows us to measure the amount of mass in a certain volume of a substance.
Then, the expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:
[tex]density=\frac{mass}{volume}[/tex]
What is Avogadro's NumberAvogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023×10²³ particles per mole. Avogadro's number applies to any substance.
Amount of molecules of airIn this case, you know that:
Density= 0.97 [tex]\frac{g}{mL}[/tex]Volume= 1 L= 1000 mLReplacing in the definition of density:
[tex]0.97 \frac{g}{mL}=\frac{mass}{1000 mL}[/tex]
Solving:
mass= 0.97 [tex]\frac{g}{mL}[/tex] ×1000 mL
mass= 970 g
Air has an average molar mass of 28.8 g per 1 mol. Then 970 grams are contained in 33.68 moles.
Now, considering the definition of Avogadro's number you can apply the following rule of three: If 1 mole of air contains 6.023×10²³ molecules, 33.68 moles contains how many molecules?
amount of molecules = (33.68 moles× 6.023×10²³ molecules)÷ 1 mole
amount of molecules= 2.0286×10²⁵ molecules
Finally, you take 2.0286×10²⁵ molecules of air.
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After absorption, long-chain fatty acids and monoglycerides inside intestinal cells are
After absorption, long-chain fatty acids and monoglycerides inside intestinal cells are reformed into triglycerides.
Where are long chain triglycerides absorbed?As previously mentioned, MCTs do not delay gastric emptying and are absorbed faster in the intestine than MCTs, being transported via blood to the liver.
In this case, long-chain triglycerides are oils or fats of vegetable or animal origin, and are obtained from the reaction between a fatty acid and glycerol.
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The given graph shows the amount of waste generated, dumped and treated in percentage. Identify the reason of low success rate of waste management process.
Waste disposal and waste management are significant problems in today's world. Garbage generation and disposal pose a real threat, resulting in server environmental issues. The issue is not with biodegradable or recycled waste. We recognize the need to reduce non-biodegradable waste. In this only 15% of urban waste is processed, and less than 60% of waste is collected from households. The correct option is d.
What is waste disposal?Waste disposal is the collection, processing, recycling, or disposal of human society's waste materials. Waste is classified according to its source and composition.
Waste disposal and waste management are significant problems in today's world. Garbage generation and disposal pose a real threat, resulting in server environmental issues.
The issue is not with biodegradable or recycled waste. We recognize the need to reduce non-biodegradable waste.
In this only 15% of urban waste is processed, and less than 60% of waste is collected from households.
The missing options of the question are attached below
Thus, the correct option is d.
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Why did problems with low oxygen levels and increasing carbon dioxide levels develop in Biosphere?
The problem with low oxygen levels and increasing carbon dioxide levels develop in the Biosphere because the oxygen was absorbed by the population of microbes that are growing in an uncontrolled manner and some other concrete structures present in the Biosphere.
What is Biosphere?A biosphere may be defined as the areas of the surface and atmosphere of the earth or another planet inhabited by living organisms. It may also be regarded as the zone of life on earth.
The amount of carbon dioxide directly depends on the amount of oxygen. If the oxygen level reduces, the level of carbon dioxide will definitely tend to increase.
The level of oxygen accounted as low in the biosphere due to the microbial respiration to a larger extent. And thereby, the level of carbon dioxide increases.
Therefore, it is well described above.
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There are six people in the Fisher family. Olivia and Marcus are the parents. They have four children: Violet, Nathan, Jonas, and Claudia.
Neither Olivia nor Marcus have freckles.
What is Olivia's genotype?
What is Marcus' genotype?
What is the probability that each child has of inheriting freckles?
Both Marcus and Olivia are heterozygous for the hairline trait.
What is the probability that each of their children could inherit a widow's peak?
What is the probability that each of their children could inherit a straight hairline?
What is the probability that each of their children could be homozygous dominant for the trait?
Neither Marcus nor Olivia can roll their tongues.
How many of their children could be born with the ability to roll their tongues?
How many of their children could be heterozygous?
What is the genotype of the whole family?
All four children have dimples.
What is likely the genotypes of their parents?
Do we know with certainty that one of the parents has to have dimples?
Both Olivia and Marcus are EE for the earlobe trait.
Among their children, what is the ratio of free earlobes to attached earlobes?
What percentage of the children are homozygous?
Marcus can not detect the bitter taste. Olivia has been found to be able to detect the bitter taste, but she is heterozygous for the trait.
What is the probability that each of their children could taste the ptc paper?
If Violet can not taste the ptc paper, what is Violet's genotype?
Given what you know, how many of the family can taste the ptc paper?
1.
Freckles are caused by a dominant allele (F).
Marcus and Olivia have recessive homozygotes for the characteristic, ff, if neither of them has freckles.
Olivia's genotype is thus ff.
Marcus has a ff genotype.
Given that they are both recessive homozygotes for the ff gene, there is little chance that their offspring will have freckles.
2.
The straight hairline allele, W is recessive to the widow peak allele, W.
Marcus and Olivia share the hairline trait heterozygosity Ww.
The likelihood of a widow having children is highest when:
Ww = Ww, Ww, Ww, and ww
Widow's peak probability (WW or Ww) equals 3/4
The likelihood that a youngster will have a straight hairline is 1/4.
The likelihood that the offspring will be homozygous
3.
The attached-lobule trait, e, is recessive to the free-lobule trait, E.
The trait, EE, is homozygous dominant in both parents.
One to zero is the ratio of free to connected lobes.
The offspring will be homozygous dominant free lobules, EE, in all cases.
4.
The ability to taste bitter flavors is dominant (T).
Marcus is a recessive homozygote for the trait "tt" since he cannot sense bitterness.
Olivia possesses a "Tt" heterozygote for the trait.
Tt tt equals Tt, Tt, tt, and tt.
There is a 50% chance that each of their kids will try the PTC paper.
Violet's genotype is tt since she cannot taste PTC paper.
5.
T, tongue rolling is a dominant characteristic.
Marcus and Olivia both have tt genotypes since neither of them can roll their tongues.
tt = tt = tt = tt
Therefore;
Their offspring won't be able to roll their tongues.
No hybrids will be born to them.
The entire family shares the genetic tt.
6.
A dimple is a dominant trait (D)
The four youngsters all have dimples.
Therefore,
It's possible that both of their parents carry the dominant allele for the characteristic "DD" or
One of them is heterozygous, or "Dd," and the other is homozygous.
The dominant h0m0zygote "DD" is one of them, while the recessive h0m0zygote "dd" is the other.
Therefore, at least one parent must have a dimple.
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An owl,
grasshopper, grass plant, and shrew are all part of the same food chain.
1. Describe what a food chain represents.
2. What would be the order of these organisms in a food chain?
3. Which organism is the producer? Explain.
4. Which organism is a tertiary consumer? Explain.
Number your answers in your response below.
The food chain represents the linear sequence of organisms through which nutrients and energy gets transferred from one trophic level of the organism to another.
What is the Trophic level?In a food chain, the trophic level may be characterized as the hierarchical series that is illustrated by organisms that are the exact number of steps extracted from the primary producers.
The order of the food chain is:
Grass plants → Grasshopper → Shrew → Owl.
The grass plant is a producer in this food chain, a grasshopper is a herbivore (primary consumer), the shrew is a carnivore (secondary consumer), and an owl is an omnivore (tertiary consumer).
Therefore, it is well described above.
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Identify the correct statement(s) regarding heritability Heritability is always calculated by a correlation between parental (mid-parent) and offspring traits If heritability is equal to 1, offspring mean is equal to the mean of the original population When heritability is equal to 1, response to selection is equal to selection differential All of the above are correct
The correct statement regarding heritability is D. All of the above are correct.
What is heritability?Heritability simply means a measure of how well differences in the genes of people account for the difference in their traits.
In this case, a the options given regarding heritability are correct.
Therefore, the correct option is D.
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The size of most prokaryotic cells is about _________ in diameter.
1-2µm
3-4µm
4-5µm
2-5µm
Answer:
option 1
Explanation:
The size of most prokaryotic cells is about in diameter.
1-2µm
The size of most prokaryotic cells is about 1-2µm in diameter. Therefore option A is correct.
Most prokaryotic cells are relatively small, typically ranging in diameter from 1 to 2 micrometers (µm). Prokaryotes are unicellular organisms without a true nucleus or membrane-bound organelles.
Their small size is advantageous as it allows for efficient nutrient uptake and waste elimination, facilitating rapid growth and replication.
Despite their small size, prokaryotic cells are highly diverse and can be found in various environments, including soil, water, and even within the human body.
Therefore option A is correct.
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on area is 10m * 10m and 6 quadrants of 0.5 * 0.5m where set randomly and counted six five four three two and one grass respectively how many grasses would be found in the whole area
What two layers are the smooth muscle cells arranged in?
Answer:
The smooth muscle in the intestine is arranged into two layers: an inner circular layer and an outer longitudinal layer.
The two layers that the smooth muscles cells are arranged in are; an inner circular layer and an outer longitudinal layer.
What are the Intestine Muscles?The smooth muscle cells of the intestine has three layers of smooth muscle that consists of the outer longitudinal, the middle circular, and the inner oblique muscles.
Now, out of all the three layers listed above, the two layers that the smooth muscles cells are arranged in are an inner circular layer and an outer longitudinal layer.
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I need the answer asap
Answer:
Executive
Explanation:
having the power to put plans, actions, or laws into effect.
Question 3 of 10
What was the purpose of treating the radish seeds for the lab "Radical
Radishes" with radioactive cobalt-60?
A. To cause mutations in the radish embryos
B. To hybridize normal radish DNA with a radioactive DNA probe
C. To kill all the living microorganisms on the seeds
D. To produce labeled probes with radish DNA
SUBMI
The purpose of treating the radish seeds with radioactive cobalt-60 is to cause mutations in the radish embryos (Option A).
What is chemical mutagenesis?Chemical mutagenesis is a technique used in molecular biology laboratories by inducing mutations in germinal cells.
Chemical mutagenesis is very useful to link an anormal phenotype to a mutated gene, an approach known as reverse genetics.
In conclusion, the purpose of treating the radish seeds with radioactive cobalt-60 is to cause mutations in the radish embryos (Option A).
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Colorado has a vast population of lodgepole pines. A population of lodgepole pines has been killed in a section of the forest. What is a possible limiting factor of that population?
devastation by the pine bark beetle
Colorado’s long history of acidic soils
genetic variability
shallow root system
The possible limiting factor is the devastation by the pine bark beetle.
What is a limiting factor?A limiting factor is any factor that affects the size of a population of organisms which inhibits their growth or even existence.
The possible limiting factor of population of lodgepole pines is the devastation by the pine bark beetle.
This is so because only a section of the population was affected and not the whole.
If it was the Colorado’s long history of acidic soils, genetic variability and shallow root system, the whole population of lodgepole pines would have been affected.
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Answer:
a. devastation by the pine bark beetle
Explanation:
Validity of an experiment is based upon:
A. Using a control group.
B. Performing a fair test in which only the independent variable affects the dependent variable.
OC. Using multiple independent variables.
D. Performing a fair test, in which only the dependent variable affects the independent variable.
A
JUL
2
tv
Answer:
performing a fair test, in which only the dependent variable affects the independent variable
Which of the following is NOT true of viruses?
A. Some viruses have a membrane envelope.
B. Viruses need a living cell to reproduce.
C. Some viruses live through the lytic cycle.
D. Some viruses contain both DNA and RNA.
Some viruses contain both DNA and RNA as their genetic material is NOT true of viruses (option D).
What is a virus?A virus is a non-living entity that needs a suitable host to reproduce its genetic material (DNA or RNA).
Viruses may contain a genetic material composed of other DNA or RNA but not both.
In conclusion, some viruses contain both DNA and RNA as their genetic material is NOT true of viruses (option D).
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A nursing instructor is reviewing the role and function of stem cells in the bone marrow with a group of nursing students. After providing the explanation, the instructor asks the students to use their knowledge of anatomy and physiology to determine an alternate way in which adults with diseases that destroy marrow can resume production of blood cells. Which explanation by the students is correct
Bone marrow transplant is the alternate way that destroy marrow can resume production of blood cells.
Determine an alternate way for destroy marrow?A bone marrow transplant, is the treatment and an alternate way that destroy marrow can resume production of blood cells. If a donor is found, your diseased bone marrow is depleted with radiation or chemotherapy and the new bone marrow is transplanted.
So we can conclude that bone marrow transplant is the alternate way that destroy marrow can resume production of blood cells.
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Suggest why glucose is converted to glycogen rather than kept as glucose inside the cells
Explanation:
after a main glucose and the liver and level of blood glucose rise this successful course is guilt with by the glucose lenses which is the liver Converse glucose into glycogen for storage the glucose that is not stole is used to produce energy by a process called glycolysis
ASAPPPP EASYYYY ILL MARK BRAINLY
Select all direct effects increasing UVR have on animals?
is
a) reduces immunity to diseases
a direct effect increasing UVR have on animals
a. reduces immunity to diseases
The effect increasing UVR has on animals is reducing immunity to diseases.
What is UVR?A body could be heated to an incandescent temperature to generate UV radiation, which seems to be the case with solar UV, or an electric current would be sent through a gas, typically vaporized mercury, to generate UV radiation.
What are diseases?A disease would be a specific aberrant state that adversely affects an organism's structure as well as function on the whole or in part, and which could be not immediately brought on by any external trauma.
Therefore, the correct answer will be an option (a)
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Suppose an mRNA consists of 60 nucleotides; it directs a primary polypeptide chain containing __________ amino acids to be synthesized.
An mRNA that consists of 60 nucleotides directs a primary polypeptide chain containing 18 amino acids to be synthesized.
What is the genetic code?The genetic code is a series of instructions by which a cell can synthesize proteins through two sequential processes: transcription (mRNA) and translation (protein).
The translation is produced from messenger RNAs (mRNAs), where triples of nucleotides or codons give rise to specific aminoacids.
In conclusion, an mRNA that consists of 60 nucleotides directs a primary polypeptide chain containing 18 amino acids to be synthesized.
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How does a motor neuron work when a mosquito is seen on an arm? it receives stimuli information from the skin and sends it to the brain where it is processed. it receives processed information from the brain, causing the muscles of the arm and hands to remove the mosquito from the arm. it processes information from the stimuli receiver and makes the brain aware that there is a mosquito on the arm. it makes the arm numb from the effect of the mosquito bite.
The motor neuron work when a mosquito is seen on an arm as it receives processed information from the brain, causing the muscles of the arm and hands to remove the mosquito from the arm. The correct option is B.
What is a motor neuron?Motor neurons are a type of brain cell that can be found in both the spinal cord and the brain.
The motor neuron work when a mosquito is seen on an arm as it receives processed information from the brain, causing the muscles of the arm and hands to remove the mosquito from the arm.
Thus, the correct option is B.
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Answer:
b is correct
Explanation:
cells were first discovered when a scientist named _____________ observed cell walls in cork under a microscope
The cells were first discovered when a scientist named Robert Hooke observed cell walls in cork under a microscope.
Who was Robert Hooke and what was his importance for cytology?Robert Hooke's observation made it possible to visualize the dead cell walls of cork, even without knowing what the image represented, exactly, and without relating living beings to a cellular composition.
In the beginning, the cell theory was elaborated by the scientist Robert Hooke, in the year 1665. Based on this research, the cell is a morphophysiological unit of all living beings, that is, it corresponds to the smallest unit of life.
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Which statement about generic disease is true
A
B
C
Answer:
B. Genetic diseases are CURABLE but not TREATABLE.
The world's largest ocean is the
a. Indian Ocean
b. Arctic Ocean
C. Atlantic Ocean
d. Pacific Ocean.
[tex]\huge\purple{Hi!}[/tex]
the answer is d.pacific ocean is the largest ocean in the world it is also the world's deepest ocean.
Option d is correct. Pacific Ocean is the largest ocean in the world.
The Pacific Ocean, A body of seawater that stretches from the Antarctic region in the south towards the Arctic Circle in the north and is sandwiched between Asia and Australia on the west and South and North America on the east. It covers roughly one-third of the earth's surface and is arguably the largest of the world's oceans. Its total area, excluding neighbouring seas, is estimated 63,800,000 square miles (165,250,000 square kilometres), which is twice the size of the Atlantic Ocean and larger than the entire land area of the world. It has a mean depth of 14,040 feet (4,280 m). The western Pacific is known for its numerous outlying seas.
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Compare the origins of the common carotid arteries of the fetal pig with those of the human.
The comparison is that in humans, only one carotid arteries branches from the brachiocephalic artery while for the fetal pig, both arteries branches from the brachiocephalic artery.
What is the comparison of the Arteries?
The difference between the origins of the carotid arteries in the human heart and the fetal pig is that In a human, the right carotid arteries branches from the brachiocephalic artery, while the left common carotid artery comes directly out of the aortic arch.
Meanwhile, In the fetal pig, both carotid arteries branch from the brachiocephalic artery.
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The method of _______ is used for tests of hypotheses that three or more population means are equal.
߷[tex] \huge \tt \:{ \underbrace{ \overbrace {\pink{Answer}}}}[/tex]߷
● The method of " one-way analysis of variance " is used for tests of hypotheses that three or more population means are equal.
Answer:
one-way analysis of variance
Explanation:
Preservation of Habitats - Everglades NP, FL. North of the park border, if developers or farmers drain and utilize this land, what will happen to the source of water for the Everglades, and therefore to the ecosystem of the Everglades
Farmers draining and utilizing the land the Everglades will dry up the source of the water of the Everglades and disrupt the ecosystem of the Everglades.
What is a habitat?
A habitat is an area where living organisms are found and make their home.
The Everglades is an wetland habitat where the land is covered by water most times of the year.
Farmers draining and utilizing the land of the Everglades will result in the source of the water of the Everglades drying which will disrupt the ecosystem of the Everglades.
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The sympathetic nervous system a. is always excitatory for smooth muscle b. innervates only tissues concerned with protecting the body against challenges from the outside environment c. dominates in rest-and-digest situations d. contains cholinergic and adrenergic fibers e. a and d
The sympathetic nervous system innervates only tissues concerned with protecting the body against challenges from the outside environment.
What is the importance of sympathetic nervous system?The sympathetic nervous system orders the body to quick involuntary response to stressful situations. A specific hormones boosts the body's alertness and heart rate in order to send extra blood to the muscles.
So we can conclude that the sympathetic nervous system innervates only tissues concerned with protecting the body against challenges from the outside environment.
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———is to animals cells as cellulose is to plant cel
Answer:
lipids and protein is to animal cells as cellulose is to plant cell
