which scientist figured out the double helix shape of dna?

Answers

Answer 1

The scientist who discovered the double helix structure of DNA is James Watson. Watson and Francis Crick established the correct model for the DNA molecule in 1953 based on data provided by Rosalind Franklin and Maurice Wilkins.

They deduced the structure by interpreting X-ray diffraction produced by Rosalind Franklin and Maurice Wilkins.Main Answer:James Watson discovered the double helix structure of DNAThis was accomplished with the help of his colleague Francis Watson and Crick made the first description of the double helix structure of DNA in 1953.

They worked together to interpret the images produced by Rosalind Franklin and Maurice Wilkins and created the model for the DNA molecule.Their findings were published in the journal Nature. The article, titled "Molecular Structure of Nucleic Acids: A Structure for Deoxyribose Nucleic Acid," their model for the double helix structure of DNA.

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Related Questions

Exposure to a harmful substance in the first 6 weeks of embryonic development is most likely to have an effect on_______.

Answers

Answer:

Embryo/ fetus in self

Explanation:

________ are hardened cell fragments form in the distant convoluted tubules and collecting ducts and flushed out of the urine tract.

Answers

Answer: CASTS or CALCULI are hardened cell fragments formed in the distal convoluted tubules and collecting ducts and urinary tract.

Explanation:

What must be the genotype of a couple that has a 100% chance of producing offspring that areheterozygous for the PTC taster gene?

What must be the genotype of a couple that has a 100% chance of producing offspring that areheterozygous

Answers

A taster gene is a dominant trait. The probable gene of the parents that is more likely to produce 100% heterozygous offspring are:

Parent 1- TT (homozygous taster)

Parent 2- Tt (heterozygous taster)

When these genotypes TT X Tt are crossed the results are:

TT, TT, Tt, Tt

TT- 50% homozygous taster of PTC

Tt- 50% heterozygous taster of PTC

Explain how a wholemeal sandwich with tuna and tomatoes will be broken down by the digestive system. Start the process from the mouth and end at the anus.​

Answers

Answer:

All of our energy and nutrition come by way of the gastrointestinal (GI) tract. It is an amazing machine well designed for digesting and absorbing nutrients and for shielding the rest of the body from microorganisms, viruses and other foreign matter. The GI tract spans from the mouth to the anus, with each separate organ having a role in digestion, absorption or excretion.Lastly, if you would like to learn more about yourself and how you can best reach your own nutritional and fitness goals, we encourage you to take a look at the following home health testing guides and resources:

Food Sensitivity Testing Guide

DNA Health Testing Guide

Guide to Life Extension Products

Home Health Testing Guide

Everlywell Home Tests Guide

Home Testing for Heavy Metals

Explanation:

(: tsorry hope to help

solve it according to the question please.
the subject is petroleum, so please solve it regardibg
this.
F- Explain the global carbon-climate cycle during the Cretaceous period. (Write only one paragraph describing what happened during the Cretaceous geological period in order to have good source rocks.)

Answers

During the Cretaceous period, high temperatures and abundant vegetation resulted in increased \(CO_2\) levels, leading to the accumulation of organic matter and the formation of good source rocks for oil and gas.

During the Cretaceous period, spanning from approximately 145 to 66 million years ago, the global carbon-climate cycle played a crucial role in the development of favorable conditions for the formation of good source rocks. The period was characterized by high global temperatures and abundant vegetation, resulting in increased carbon dioxide \((CO_2)\) levels in the atmosphere.

The elevated \(CO_2\) levels fueled vigorous photosynthesis, leading to the accumulation of organic matter in marine and terrestrial ecosystems. As this organic matter was buried and subjected to heat and pressure over millions of years, it transformed into oil and gas, creating potential source rocks. The warm climate and prolific vegetation during the Cretaceous, along with the subsequent geological processes, contributed to the formation of the rich hydrocarbon reserves that are vital to our energy resources today.

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The correct question is:

Explain the global carbon-climate cycle during the Cretaceous period. (Write only one paragraph describing what happened during the Cretaceous geological period in order to have good source rocks.)

Why might a group of mule deer move to another area if a larger herd of deer have come to the same habitat?
Commensalism
Mutualism
Competition
Predation

Answers

Answer:

Competition

Explanation:

Since its a same type of species, they would be going after the same food, therefore if more deer had migrated to their habitat, the mule deer will also migrate somewhere else to look for food. Reason for competition: food and habitat

hope this helps :D

The answer is Competition

Explain why X-linked recessive traits are more common in males than females.

Hint: If you are stuck, try explaining why a boy (XbY) has colour vision deficiency and a girl (XBXb) does not, even though they both have the recessive allele Xb.

Answers

X-linked recessive traits are more common in males because the decease is only carried on the X chromosome therefore females need two copies of the gene to have the decease whereas in males they only need one copy. This is because males are XY and females are XX

X-linked recessive traits are more common in males than females because males only have one X chromosome while females have two. This means that if a male inherits an X chromosome with a recessive allele, it will be expressed in his phenotype.

if a tunicate's pharyngeal gill slits were suddenly blocked, the animal would have trouble _____.

Answers

If a tunicate's pharyngeal gill slits were suddenly blocked, the animal would have trouble respiring and feeding.

What are the tunicate's pharyngeal gill slits?

The tunicate's pharyngeal gill slits are a series of structures within this taxonomic group that function in order to make the process of respiration and feeding possible by filtering substances in the aquatic environment.

Therefore, with this data, we can see that the tunicate's pharyngeal gill slits play a fundamental role in filtering substances.

Complete question:

Fill in the blank. If a tunicate's pharyngeal gill slits were suddenly blocked, the animal would have trouble___.

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1. Based on the relative humidity in the room (average for the 3 trials), would a drop of water on your hand evaporate? If so, do you think it would evaporate quickly? Explain your answer. (5 pts)

1. Based on the relative humidity in the room (average for the 3 trials), would a drop of water on your

Answers

Answer:

Yes.

Explanation:

Because the air is not at its max saturation point, which means that it could possibly melt in your hand.

Select the correct answer.
Which is an advantage of sexual reproduction over asexual reproduction?
A. increased number of organisms and decreased genetic variationdecreased genetic variation
B. doesn’t require an organism to find a mate
C. increased genetic variation
D. decreased genetic variation and decreased number of organism

Answers

i believe the answer is C

Answer:

C

Explanation:

the others look like the advantage of asexual reproduction

Would an animal with a broad or narrow niche have a better chance of survival if it was transplanted into another habitat?
1. narrow
2. broad

Answers

Answer: I´m pretty sure it´s broad

Explanation:

Which of the following observation supports the hypothesis that mitochondria evolved before chloroplasts? a. All eukaryotes have mitochondria, but not all eukaryotes have chloroplasts. b. Mitochondria and chloroplasts divide in a way similar to how bacteria reproduce. c. The DNA sequence of mitochondria is similar to the DNA sequence of some aerobic bacteria. d. Mitochondria are similar in size and shape to some bacteria.

Answers

The observation that supports the hypothesis that mitochondria evolved before chloroplasts is:

c. The DNA sequence of mitochondria is similar to the DNA sequence of some aerobic bacteria.

This observation suggests a close evolutionary relationship between mitochondria and certain aerobic bacteria. The similarity in DNA sequences implies a common ancestry or horizontal gene transfer between mitochondria and these bacteria. It provides evidence that mitochondria may have originated from an endosymbiotic event involving the incorporation of a free-living aerobic bacterium into a host cell.

While the other options also provide relevant information, such as the presence of mitochondria in all eukaryotes (a) and the similarity in division mechanisms between mitochondria, chloroplasts, and bacteria (b), it is the similarity in DNA sequences (c) that directly supports the hypothesis of mitochondria evolving before chloroplasts. The size and shape similarity between mitochondria and some bacteria (d) can be considered a supportive observation but is not as strong of evidence as the DNA sequence similarity.

Therefore, the correct option is C.

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URGENT: Many job data sources are misleading because they use _____
average earnings figures.
For plant systems

Answers

Many job data sources are misleading because they use less average earnings figures.

What are the sources of job data?

Internal sources of information include published information including organizational charts, job announcements, position descriptions; direct or indirect (e.g., review of video) observation; input from management, employees and/or a relevant subject matter expert, obtained through interviews or via questionnaires.

Many job data sources are misleading because they use less average earnings figures.

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Answer:

Its state

Explanation:

trust me

Which muscle originates on the occipital bone and spines of c7-t12 and inserts on the clavicle and acromion of the scapula?.

Answers

Answer:

trapezius

Explanation:

HELPPPPPPPPPPPPP #17

HELPPPPPPPPPPPPP #17

Answers

Answer:

i would say i might be A

Explanation:

very sorry if im wrong

the uneven cleavage of cells early in the development of the yolk-rich embryos of birds is called . view available hint(s)for part a the uneven cleavage of cells early in the development of the yolk-rich embryos of birds is called . holoblastic cleavage meroblastic cleavage neurulation gastrulation organogenesis

Answers

The uneven cleavage of cells early in the development of the yolk-rich embryos of birds is called meroblastic cleavage.

This type of cleavage is different from holoblastic cleavage, which is found in embryos with less yolk. In meroblastic cleavage, the cleavage furrow only penetrates a portion of the yolk, resulting in the formation of a blastodisc on top of the yolk. The blastodisc then undergoes further cell division and differentiation, leading to the formation of the embryo.
This type of cleavage is important for the development of yolk-rich embryos because it allows the embryo to access the nutrients stored in the yolk. Meroblastic cleavage is further divided into two types: discoidal and superficial cleavage. In discoidal cleavage, the blastodisc is formed at the top of the yolk, while in superficial cleavage, the cleavage occurs only in the superficial layer of the embryo.

Overall, meroblastic cleavage is a crucial part of bird development and adaptation to their unique yolk-rich environment.

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Which is the FALSE statement about this blood pressure measurement? 147/92 A. 92 is the diastolic number. B. 147 is the systolic number. C. This is a high blood pressure measurement. D. This is a normal blood pressure measurement.

Answers

Answer:

The false statement is - option D.

Explanation:

The lower value is known as diastolic number which is the pressure in the arteries when the heart takes rest in between two consecutive heart beats. Diastolic value shows the pressure of arteries when heart fills with blood.

The upper value or number is known as the systolic number, it is the pressure value of arteries of an individual during the contraction of hear. The normal blood person of a health person is range from 80/60mmhg to 120/90 mmhg, above this range is considered as high blood pressure.

Thus, the false statement is - option D.

WHAT IS OUR NATURAL SATELLITE ???​

Answers

Answer:

the moon is our natural satellite.

a)State the role of saliva in human beings b) State 2 hormones involved in digestion​

Answers

Answer:

A) The digestive functions of saliva include moistening food, and helping to create a food bolus, so it can be swallowed easily.

B) The five major hormones are: gastrin ( stomach ),                                                          secretin ( small intestine ), cholecytokinin (small intestine), gastric inhibitory peptide (small intestine), and motilin (small intestine).

Explanation:

Explanation of answer A):

Saliva contains the enzyme amylase that breaks some starches down into maltose and dextrin. Thus, digestion of food occurs within the mouth, even before food reaches the stomach.

Which of the following explains
why wind exists?
A. Air moves from areas of high pressure to
areas of low pressure.
B. Ions in the air repel and push each other
across the planet.
C. Air moves through the atmosphere due to
Earth's magnetic field.
D. The moon's gravity pulls air across Earth like
ocean tides.

Answers

Answer:

AIR MOVES FROM AREA OF HIGH PRESSURE TO AREA OF LOW PRESSURE.

Explanation:

What happens when organisms populate a new area and are isolated geographically from other populations of the same species?

Answers

Answer:

The geographically isolated population will acquire genetic differences that eventually will lead to its speciation

Explanation:

Geographic isolation is a biological process produced by the physical separation between organisms of the same species, which may be caused by different types of geographical barriers such as, among others, mountains, earthquakes, rivers, etc. Geographic Isolation produces genetic differences between the separated groups. Over time, these genetic differences will lead to the reproductive isolation of the new population, thereby leading to the formation of a new species in the course of evolution, in a mechanism referred to as speciation.


Describe the movement of water if cells are in a hypertonic solution, hypotonic solution, and isotonic solution.
Why?

Answers

Water molecules move inside the cell in a hypotonic solution causing it to swell


Water molecules move outside the cell in a hypertonic solution causing it to shrink


Water molecules in an isotonic solution does not move inside or outside the cell and the cell’s volume will remain stable

What is a gene?
the different forms of a trait

Answers

Answer:

A gene is the basic physical unit of heredity. Genes are made up of a sequence of DNA and carry all the information needed to make us who we are. Genes are passed from parent to child in a specific sequence that decides our traits. Will you be short or tall, have straight hair or curly hair, blue eyes or green?, are a few examples of physical traits.

True or False: An El Nino cycle increases the odds of severe weather events in parts of the world.

Answers

TRUE, it brings wetter and warmer conditions that are atypical. So El Niño cycle brings more extreme climatic fluctuations.

Explain the difference between obligate and facultative mutualism

Answers

In obligate mutualism, one partner cannot complete its life cycle on its own, and in facultative mutualism partner do not necessarily need another partner for survival.

What is mutualism?

The interaction between two species where both the species are benefited from the interaction. It is the common ecological interaction example, including mycorrhizae.

Types of mutualism:

resource-resource relationshipservice-resource relationship service-service relationship.

Therefore, when species are dependent on each other it is obligate mutualism and when they are independent of each other, it is facultative mutualism.

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Endangered Species
Research an endangered species. Include an image of this species. Discuss the following questions: Approximately how many are left? When is the estimated time they will be extinct? What is the major cause of their future demise?

Vulnerable Species Research a vulnerable (threatened) species. Include an image of this species. How many are there left or have reappeared? What is being done to help them come back? What was the cause of their decline or demise?

Answers

a. Endangered Species: African Elephant: The African elephant is a majestic species that is facing extinction due to various factors. Approximately 415,000 African elephants remain in the wild, with their population declining by 60% over the last 75 years.

b. According to the International Union for Conservation of Nature (IUCN), the African elephant is classified as vulnerable, and it is estimated that if current trends continue, they could be extinct within the next few decades.

The major cause of their future demise is the illegal wildlife trade, particularly the demand for ivory. Poaching for ivory has led to the killing of tens of thousands of elephants each year, resulting in severe population declines in many African countries. In addition to poaching, habitat loss and fragmentation, human-wildlife conflict, and climate change also pose significant threats to African elephants.

To help African elephants, several conservation efforts are underway. These include anti-poaching measures, habitat restoration, and community-based conservation programs. In addition, many countries have banned the trade in ivory, although enforcement of these laws can be challenging.

Vulnerable Species: Snow Leopard: The snow leopard is a vulnerable species that is found in the high-altitude mountain ranges of Central and South Asia. Approximately 4,000 to 6,500 snow leopards remain in the wild, with their population declining by 20% over the last three decades. According to the IUCN, the snow leopard is classified as vulnerable due to habitat loss and fragmentation, poaching, and retaliatory killings by herders.

The major cause of their decline is habitat loss and fragmentation due to human activities such as mining, agriculture, and infrastructure development. In addition, poaching for their pelts and body parts is also a significant threat to snow leopards. Retaliatory killings by herders who lose their livestock to snow leopards are also a major cause of their decline.

To help snow leopards, several conservation efforts are underway. These include habitat restoration, anti-poaching measures, and community-based conservation programs. In addition, the Snow Leopard Trust and other organizations are working to educate local communities about the importance of snow leopards and to promote sustainable development practices that minimize negative impacts on snow leopard habitat.

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Environmental Concerns ( and two ways to counter)

Answers

Some of the most common environmental concerns include climate change, air pollution, water pollution, deforestation, etc.

Here are some of them and ways to counter them:

Global warming and climate change: Replace fossil fuels with renewable energy, and reduce emissions from agriculture.

Water pollution and ocean acidification: Recycle waste to conserve natural resources, and change industrial processes.

Loss of biodiversity: Government should create and implement stricter policies and laws related to the conservation of biodiversity, and the practice of sustainable living.

Food waste: Educate yourself on the meanings of certifications and labeling, and advocate for better protection for farmed animals through new legislation propositions.

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The complete question is -

What are some environmental concerns and what are two ways to counter them?

what countries are developing destructive or defensive weapons in space?

Answers

Answer:

Anti-satellite weapons, which are primarily surface-to-space and air-to-space missiles, have been developed by the United States, the USSR/Russia, India and the People's Republic of China. Multiple test firings have been done with recent Chinese and U.S test program that destroy an orbiting satellite.

HELP! FAST! I'LL GIVE BRAINLYEST IF RIGHT!!!!
Which of the following are pharmacological treatments? Check all that apply. antacids endoscopies ultrasounds mint antibiotics

Answers

Answer:

Antiacids, antibiotics and mint (Peppermint oil is under preliminary research for its potential as a short-term treatment for irritable bowel syndrome)

Antacids and antibodies are the pharmacological treatments. Therefore, the correct statements are option A and option E.

What are pharmacological treatments?

Pharmacological treatments are drugs that help to treat various medical conditions. They act by changing the biochemical and physiological properties of a body to cure the underlying disease.

Antacids used to treat stomach acid and conditions like heartburn by raising the pH of the stomach acid, thereby, relieving the digestion problems. Antibodies are also used to treat bacterial infections by targeting the growth of bacteria.

Endoscopies and ultrasounds, on the other hand, are used to examine internal organs or tissues and mint is a natural remedy to relieve digestion problems.

Therefore, antacids and antibodies are pharmacological treatments.

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Study the diagram. A student on Earth's surface at position A has just seen the sunrise. Which one
of the following is true for a second student at position B?


А
The second student has already seen the same sunrise.
B
The second student has not yet seen the same sunrise.
С
The second student is watching the Sun start to set.
D
The second student will see the Sun rise in 24 hours.

Study the diagram. A student on Earth's surface at position A has just seen the sunrise. Which oneof

Answers

Answer:

The answer is D

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At a rate of 4 gallons per minute how long will it take to fill a 300 gallon swimming pool There are twenty one pictures. They will be hung in three equal groups. How many pictures will be in each group ?A. 3 picturesB. 7 pictures C. 18 pictures D. 24 pictures Which of the following is the correct formula for sulfuric acld?O H2SO3O HSO 3O HSO 4O H2SO4 What happened to Greece as a result of the Peloponnese war 2 3/15 rounded to the nearest half literally the only question I'm struggling to understand rn...i hate puzzles :C. Which of the following statements about outlines are NOT true? A triangle has 2 angles that each measure 19)What kind of triangle is it?Oh, isosceles ulangleOB. equiangular trianglec. obtuse triangleOD. right triangle Differentiate the function. g(x)=3x ^3 (x^4 3x^3 +13x9) g (x)= Hi!! Can someone answer this question please & only list the coordinates, will be listing 5 more questions The ultimate goal of an analysis section of an evaluative essay is to: Select one: a. Criticize the text or arguments being evaluated b. To summarize the text or arguments being evaluated c. To give readers a fuller understanding of the text or arguments being evaluated d. To provide the context of the arguments being presented using the information from the prior question, what is the yield to call if the bond is callable in 3 years? the istream class in the c standard library uses multiple inheritance. When a company uses economic profit as a performance metric, managers have an incentive to invest only in projects 5.76 is 4.8% of what number? president reagan implemented a policy of supply-side economics, what did this mainly entail? Some processes for making coffee leave tiny particles of ground coffee beans suspended in the coffee when it is served. Can these particles be considered a solute if they are evenly distributed throughout the cup of coffee? Explain. Solar Industries has a debt-equity ratio of 1.25. Its WACC is 7.8 percent, and its cost of debt is 4.7 percent. The corporate tax rate is 21 percent.a. What is the company's cost of equity capital?b. What is the company's unlevered cost of equity capital?c. What would the cost of equity be if the debt-equity ratio were 2? What if it were1? What if it were zero? Let A be an 4 x 4matrix with det (40) = 4. Compute the determinant of the matrices A, A2, A3, A4 and A5, obtained from An by the following operations: A is obtained from Ao by multiplying the fourth row of Ap by the number 3. det (A) = [2mark] A is obtained from Ao by replacing the second row by the sum of itself plus the 2 times the third row. det (A2) = [2mark] A3 is obtained from Ao by multiplying Ao by itself.. det (A3) = [2mark] A is obtained from Ao by swapping the first and last rows of Ag. det (A4) = [2mark] A5 is obtained from Ao by scaling Ao by the number 4. det (A5) = [2mark] Which sentence best describe what happened to the total mass of the sealed jar after the nail rusted and select the answer that best match your think Explain what happens to the mass before and after the nail rusted Nails in a Jar Jake put a handful of wet, iron nails in a glass jar. He tightly. closed the lid and set the jar aside. After a few weeks, he noticed that the nails inside the jar were rusty. Which sentence best describes what happened to the total mass of the sealed jar after the nails rusted? A The mass of the jar and its contents increased. B The mass of the jar and its contents decreased. C The mass of the jar and its contents stayed the same.