Answer and Explanation:
When sufficient heat is applied, DNA unwinds, and the hydrogen bonds that grip the strands together weaken and break. The process of breakdown of double-stranded DNA into single strands is called DNA denaturing. The temperature at which double-stranded DNA is half denatured is termed as Tm (melting temperature). By the absorbance of the DNA solution, the amount of strand melting is measured at 260nm. At this wavelength, nucleic acids absorb light. When DNA strands come together, the proximity of the bases in the DNA strands reduces some absorbance. When the DNA strands separate, the absorbance rises 30% to 40%, and quenching of the absorbance disappears. This is known as hyperchromicity. By using DNA denaturation, the sequence difference between the two DNA sequences can also be detected. When double-strand DNA is heated, it denatured into a single-stranded state. The mixture is cooled to allow the strands to re-hybridize. Hybrid molecules are formed among related sequences.
molecular similarities
3.4 Briefly describe the purpose of conjugation in paramecia.
Answer:
Conjugation is a process of exchange of genetic material between two organisms. paramecium is a unicellular protozoan in which true sexual reproduction is absent. so in these organisms conjugation brings genetic variatin in new generations.
Explanation:
The function of conjugation in paramecium is to exchange genetic material between organisms and make new combinations of genetic material.
You are monitoring Birch Lake,
A. Snails and crayfish would not survive in Birch Lake at a pH of 6.2.
B. Once they die out, the walleye will disappear as well.
Dr. Digger, a paleontologist, finds a fossil that he describes in his journal.
The creature was approximately 1 meter long, with its backbone fused into a large shell covering the body cavity. It had a beaklike mouth, without teeth, and all four limbs were in the form of flippers.
Based on anatomical similarities, to which modern animal is Dr. Digger’s creature most closely related?
zebra
bony fish
sea turtle
snake
Answer:
sea turtle
Explanation:
it is conected to a shell and has flippers
This diagram is attempting to compare the sizes of the four inner planets. What is wrong with this diagram?
A.Mars is larger than Earth
B.Venus is larger than Earth
C.Mercury is not larger than Venus
D.Earth is not the largest inner planet.
B, Venus is less than Earth, and Earth is less than Mars
What are the four levels of organization in living things? a. cell, multicellular, organ, organ system b. single cell, multicellular, tissue, organ c. larger size, longer life, specialized cells, organs d. cell, tissue, organ, organ system
55.7 moles of PCl5 will decompose to produce how many moles of PCl3 and Cl2 combined ?Enter your answer correct to 1 decimal place
Answer:
55.7 moles of PCl₃ and 55.7 moles of Cl₂
Explanation:
The balanced chemical equation for the reaction in which phosphorus pentachloride (PCl₅) is decomposed in phosphorus trichloride gas (PCl₃) and chloride gas (Cl₂) is the following:
PCl₅(g) → PCl₃(g) + Cl₂(g)
According to the stoichiometric coefficients, 1 mol of PCl₅ produces 1 mol of PCl₃ and 1 mol of Cl₂. So, the stoichiometric ratios reactant/product are: 1 mol PCl₃/1 mol PCl₅ and 1 mol Cl₂/1 mol PCl₅. Thus, we multiply the stoichiometric ratios by the number of moles of reactant:
1 mol PCl₃/1 mol PCl₅ x 55.7 mol PCl₅ = 55.7 mol PCl₃
1 mol Cl₂/1 mol PCl₅ x 55.7 mol PCl₅ = 55.7 mol Cl₂
Therefore, 55.7 moles of PCl₃ and 55.7 moles of Cl₂ are obtained from the decomposition of 55.7 moles of PCl₅.
Hello !
So are pants made out of organic or inorganic.
Or plant, animal, mineral.
please don’t guess :)
Match each of the following hormones with the endocrine gland or structure that produces it. Match the words in the left column to the appropriate blanks in the sentences on the right. Words may be used more than once.
a. parathyroid glands
b. anterior pituitary
c. hypothalamus
d. thyroid gland
e. thymus gland
f. adrenal medulla
g. pancrease
h. adrenal cortex
A. Growth hormone
B. Prolactin (PRL)
C. Adrenocorticotropic hormone (ACTH)
D. Thyrotropic hormone (TH) or thyroid-stimulating hormone (TSH)
E. Luteinizing hormone (LH) hypothalamus
F. Oxytocin
G. Antidiuretic hormone (ADH) or vasopressin
H. Follicle-stimulating hormone (FSH)
I. Thyroxine (T1)
J. Calcitonin
Answer:
A. Growth hormone- anterior pituitary
Prolactin - anterior pituitary
Adrenocorticotropic hormone- anterior pituitary
Thyrotropic hormone- anterior pituitary
Luteinizing hormone - anterior pituitary
Oxytocin - hypothalamus
Antidiuretic hormone - hypothalamus
Follicle-stimulating hormone- anterior pituitary
Thyroxine (T1) - thyroid gland
Calcitonin - thyroid gland
Explanation:
The growth hormone is released from the anterior pituitary gland. The hormone acts on many parts of the body and promotes growth especially in children.
The hormone prolactin is produced in the anterior pituitary gland during pregnancy in order to develop breast tissues and prepare for milk production.
Adrenocorticotropic hormone (ACTH) helps the body to respond to stress conditions. It stimulates the production of cortisol from the adrenal gland.
TSH is produced by the pituitary gland and controls the production of the thyroid hormones.
Luteinizing hormone is one of the hormones produced by the pituitary gland.
Oxytocin is produced in the hypothalamus and is secreted into the bloodstream directly. It is important in female reproduction and is produced in large amount during labor. It is also released when the nipples are stimulated.
Antidiuretic hormone controls of the amount of water lost via urine. It is produced in the hypothalamus.
Follicle-stimulating hormone is another hormone produced by the pituitary gland. It plays an important role in sexual development especially in women where it controls the menstrual cycle and assists in the growth of eggs.
The thyroid gland produces many thyroid hormones including T1,T2,T3 and T4.
The thyroid gland also produces calcitonin, a hormone secreted by the thyroid gland and regulates the amount of calcium in the blood.
Scientists are studying a layer of sedimentary rock and discover what appears to be ripples made by runding water preserved in the rock. When comparing those ripples to some made in mud at a present day location, they notice that the effects are identical. Based on the observations, which of the following is most likely to be true? OA. OB. The mud at the present day location is actually from the same time period as the rock The environment and conditions of both areas are exactly the same. OC. Some events that occurred in the past are similar or identical to events in the present. OD. Events that occurred in the past were dramatically different from those of today.
There are certain past occurrences that are comparable to or exact replicas of current happenings.
What can be learned about dinosaurs and other extinct creatures from the strata found in sedimentary rock?They keep a record of the old flora, fauna, and climates. The fossils contained therein are frequently used by scientists to determine the correct order of sedimentary rock layers.
What does the depositional environment normally reveal about symmetrical ripples like those shown in the sandstone below?Ripples display "tuning-fork" branches and are symmetrical. This suggests to a geologist that wave action was present during the sandstones' deposition (nearshore).
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Results in science are not generally accepted as being accurate until they can be verified. Which of the following is an example of repetition in science? A.A student designs an experiment on plant growth that includes multiple trials. B.One scientist carries out the same experiment performed by another scientist to validate the results. C.A scientist poses a new question for investigation after reading the results of another scientist’s work. D.A scientist analyzes the data included in the published work of another scientist and agrees with the conclusions
Answer:
B) One scientist carries out the same experiment performed by another scientist to validate the results.
Explanation:
repetition definition is basically B.
One scientist carries out the same experiment performed by another scientist to validate the results. Therefore, option (B) is correct.
What is repetition?Repetition in science is the process of repeating an experiment or study to verify or validate the results. This is done to ensure that the results are accurate and reliable, and not due to chance or experimental error.
An example of repetition in science is when one scientist carries out the same experiment performed by another scientist in order to validate the results and confirm that they are accurate and consistent. This process helps to build confidence in the results and increases the credibility of the scientific findings.
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How does the carrying capacity of the ecosystem for the white footed mouse respond to the changes in the amount of parasites? Compare graph 1 and graph 2 to help you answer the question, cite the data to support your answer (give numbers)
Answer:
See the answer below
Explanation:
The carrying capacity of the ecosystem for the white-footed mouse reduced in response to the changes in the amount of worm infected mice in the population.
The carrying capacity of an ecosystem for a particular population of organisms is the maximum number of organisms the ecosystem can support based on the resources it has.
The ideal carrying capacity of the ecosystem for the white-footed mouse oscillates between 36 to 40 in graph 1. The carrying capacity range reduced in graph 2 from 36 - 40 to 30 - 36 as a result of changes made to the number of mice infected with parasitic worms in the population of the animal.
Thus, the introduction of more worm-infected mice into the population probably put more pressure on the ecosystem resources thereby reducing the carrying capacity.
Collect data: Blood carries many vital substances. Four of these are listed above the Microscopic view. Oxygen and sugar are needed by all body cells. Carbon dioxide and urea are waste products. What are the concentrations of each substance in this sample?
Oxygen:
Carbon Dioxide:
Sugar:
Urea:
Answer:
Explanation:
in the given sample of blood concentration of all the comonents is normal. the concentration of urea is 2.6 to 6.5 mM, concentration of carbon dioxide is 23-29 meq/L, while concentration of glucose ad oxygen are 0.9 g and 20.1 ml respectively.
Blood is the component of the circulatory system which is essential for the transport of gases and excretion of waste products. It is crucial for nutrient and oxygen supply to the body.
The concentration of oxygen was 95.6 mmHg, carbon dioxide 39.3 mmHg, Sugar 115.5 mg and urea 13 mg.
The vital substance of blood can be explained as:Red blood cells are called erythrocytes that are responsible for oxygen transportation through the hemoglobin component to the body parts while on their way back it carries the carbon dioxide.Sugar is the major form of energy needed by the body for functioning which enters the blood from the liver.Urea is the waste complement removed with the help of blood collected from the liver and excreted by kidneys.Therefore, the normal concentration of blood substances is oxygen 95.6 mmHg, carbon dioxide 39.3 mmHg, Sugar 115.5 mg and urea 13 mg.
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What occurs in the small intestine?
A. churning
B. nutrients are absorbed
C. water is absorbed
D. breaks down food using gastric
juices
Answer:
B
Explanation:
the small intestine absorbs all the nutrients you get from your food into the bloodstream
Answer:
b
Explanation:
in the small intestine, it absorbs the nutrients and those nutrients go into the bloodstream. sorry if this explanation sucked.
What features allowed you to distinguish some of the organism on set 2
we cannot see the picture?
what advantage do multicellular organisms have over unicellular organisms?
Answer:
Explanation:
Unicellular organisms are made up of only one cell that carries out all of the functions needed by the organism and it has a large surface area to volume ratio while multicellular organisms use many different cells to function to help it transport enough molecules across it membrane.It has a small surface area to volume ratio!
Hii please help me...
When 1 mole of PCl3 is produced, how many grams of Cl2 are produced ? Enter as a number correct to 2 decimal places
Answer:
[tex]212.70[/tex] grams
Explanation:
Weight of one mole of Cl2 in grams = [tex]70.9[/tex]
Weight of one mole of PCl3 in grams = [tex]137.33[/tex]
Weight of one mole of chlorine atom in grams = [tex]35. 453[/tex]
From one molecule of PCl3, three molecule of chlorine gas can be produced.
Weight of three molecule of chlorine gas
[tex]= 3 * 70.9 \\= 212.70[/tex]grams
Please someone help me I don’t know which is which
Answer:
a pili. f flagellae
b nucleoid g chromosome
c plasma membrane h ribosomes
d cell wall
e capsule
Explanation:
Which molecule is used to cut out a section of DNA? A. Restriction endonuclease. B. Reverse transcriptase C. Gel electrophoresis D. DNA polymerase
Help plz
environmental cues can affect gene expression and protein synthesis.
true or false
Answer:
pretty sure its true
Explanation:
what is the general trend in the elk and wolf populations between 1990 and 2000?
Answer: Decrease
Explanation:
20. Edward Lambert, an Englishman, was born in 1717. Lambert had a skin disorder characterized by very thick skin that was shed periodically. The hairs on his skin were very coarse, like quills, giving him the name "porcupine man." Lambert had six sons, all of whom exhibited the same traits. The trait never appeared in his daughters. In fact, the trait has never been recorded in females. Provide an explanation for the inheritance of the "porcupine trait
Answer:
The trait is Y-linked
Explanation:
The only plausible explanation behind the inheritance pattern shown by the porcupine trait is that it is Y-linked.
Y-linked traits are limited to the Y chromosome only, a sex chromosome that is peculiar to only the male gender. Chromosomally, females are XX while males are XY. Hence, only the male gender has the genetic capacity to inherit the porcupine trait. This is why only the sons of Edward Lambert, and never the daughters, exhibited the trait.
The Jules Verne novel "20,000 Leagues Under the Sea" tells the story of the voyage of the submarine Nautilus. If one league equals 3 miles, how many kilometers did the Nautilus travel on its journey? Please round your answer to the 100's place
Answer:
96558.00 kilometers
Explanation:
From the title of the novel, it is assumed that the submarine covered 20,00 leagues on its journey.
1 league = 3 miles, therefore;
20,000 leagues = 20,000 x 3 = 60,000 miles.
1 mile = 1.6093 km
Hence,
60,000 miles = 60,000 x 1.6093 km
= 96,558 km
= 96558.00 km to the 100's place
Therefore, 96558.00 kilometers was covered by Nautilus during the journey.
You want to determine if black coat color (B) and long tail length (T) are linked in a new breed of dog (white coat and short tails are recessive). Design a two-point test cross to determine if this is indeed the case. What results would you expect if the genes were linked
Answer:
If the genes were linked, the phenotypic and genotypic ratios would be different from 1:1:1:1. The observed proportions in the F1 would be different than the expected ones if genes would assort independently.
Explanation:
Due to technical problems, you will find the complete answer and explanation in the attached files
which of these events is a likely result of chemical water pollution?
A. Sediment particles floating in water clog the gills of fish.
B. Fish die from lack of oxygen due to an algal bloom.
C. Rainbow trout disappear from a stream because of high water temperatures.
D. Algae are killed by solvents that have run off into a pond.
Fish die from lack of oxygen due to an algal bloom is a likely result of chemical water pollution. Therefore, option (B) is correct.
What is chemical water pollution?Chemical water pollution refers to the presence of harmful chemicals or substances in water bodies such as lakes, rivers, and oceans. These chemicals may come from various sources, including industrial processes, agriculture, and human activities. Common types of chemical pollutants in water include heavy metals, pesticides, oil spills, and toxic waste.
Chemical water pollution can have harmful effects on the environment and human health, including reduced water quality, contamination of aquatic life, and the spread of waterborne diseases. Preventative measures, such as proper waste disposal and treatment, are necessary to minimize chemical water pollution and protect water resources.
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It is one of the most important step in conducting a survey by knowing the environmental concerns such as potential noise, air and water pollution.
a. know your area
b. know the local trees
c. know your market
d. know the people in the community
Which of the following country has the highest land area per person need to support their lifestyle
Answer:
USA
Explanation:
how are blood stem cells targeted?
Answer:
replacing defective blood-making cells
Explanation:
Have the numbers of solid colored snails decreased significantly due to bird predation? Explain
your answer.
Answer:
Yes
Explanation:
birds pick out patterns because they are up in the air so the more brighter colored the snail the less of them there are