what experiments led to the discovery of dna as the hereditary material?

Answers

Answer 1

Answer:

In the 1920s, Frederick Griffith He was studying two different strains of a bacterium, called R (rough) strain and S (smooth) strain. He injected the two strains into mice. The S strain killed (virulent) the mice, but the R strain did not (non-virulent). Griffith also injected mice with S-strain bacteria that had been killed by heat. As expected, the killed bacteria did not harm the mice. However, when the dead S-strain bacteria were mixed with live R-strain bacteria and injected, the mice died.

Explanation:


Related Questions

What does this sentence mean?
(I Will give out brainliest ASAP thanks!!) I’m the kind of friend who gets picked up by ppl bc if not I would be the loner eating lunch or doing drugs alone in the bathroom

Answers

Answer:

I think he/she/they is saying that the reason they're okay and stable (not a drug-doing loner) is that other people have taken him/her/them under their wing.

Explanation:

Without the kind people that have chosen to take him/her/them as their friend, he/she/they doesn't think he/she/they would be as okay as they are.

Means they feel they’re not really friends but people like to spend time with them to make sure they’re not a loner

how are enzymes, proteins, and amino acids related, and what is their role in a viral take over?

Answers

Answer:

Amino acids are building blocks to proteins, and the combination and order of them determines what protein is actually being built. Then enzymes are a type of protein which facilitates or catalyses a process, such as the breaking down of molecules in your food. In a viral takeover, the virus uses your body's ribosomes to create viral proteins (consisting of amino acids). Viral enzymes actualy facilitate this by inserting viral DNA into the hostcell's DNA.

Explanation:

splanchnic nerves are composed of ______ sympathetic axons that did not synapse in a sympathetic trunk ganglion.

Answers

Splanchnic nerves are composed of preganglionic  sympathetic axons that did not synapse in a sympathetic trunk ganglion.

What do you mean by Splanchnic Nerves?

Splanchnic nerves are a group of nerves that arise from the sympathetic trunk of the autonomic nervous system and supply the viscera, or organs within the abdominal and pelvic cavities. They are involved in the regulation of functions such as digestion, blood flow, and secretion in the gastrointestinal tract, liver, pancreas, and other viscera. The splanchnic nerves are part of the sympathetic nervous system, which is responsible for the "fight or flight" response in response to stress or danger. When activated, the splanchnic nerves release the neurotransmitter norepinephrine, which causes constriction of blood vessels and increased secretion, as well as decreased motility of the viscera. The splanchnic nerves can also be involved in pain perception from the viscera, and play a role in disorders such as irritable bowel syndrome and chronic pelvic pain.

Splanchnic nerves are composed of preganglionic sympathetic axons that did not synapse in a sympathetic trunk ganglion. Splanchnic nerves are a group of nerves that originate in the thoracic and lumbar regions of the spinal cord and innervate the abdominal viscera, including the stomach, intestines, and other organs. These nerves are composed of preganglionic sympathetic axons that did not synapse in a sympathetic trunk ganglion and instead continue on to synapse with postganglionic neurons in the celiac, superior mesenteric, and other ganglia in the abdomen.

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What is insolation? What's an example?

Answers

The energy received by the earth is known as incoming solar radiation which in short is termed as insolation.

1. Put the following in order, from smallest to largest: organ, molecule, organelle, atom, organ system, tissue, organism, cell, macromolecule.​

Answers

Answer:

From smallest and largest: atom, molecule, macromolecule, organelle, cell, tissue, organ, organ system, and organism.

Explanation:

1. Atom is the most simple unit, many atoms combine to form molecules.

2. Many molecules combine to form a macromolecule like starch, protein ect.

3. Many macromolecules like DNA, RNA, protein, liquid, and carbohydrate together form a cell.

4. Cells of similar type aggregate to form a tissue.

5. Tissues are organized into orgasm.

6. Organs are organized together to form an organ system that performs a specialized task.

7. Many organ systems together form an organism.

8. An organism is a complex living form.

Economic and social changes during the Gilded Age caused
most workers to abandon labor unions.
people to stop working at many factories.
workers to seek training to get better jobs.
activists to work for a variety of reforms.

Answers

Answer:

ITS D

Explanation:

Economic and social changes during the Gilded Age caused activists to work for a variety of reforms.

What happens in Gilded age?

The American Gilded Age was a period of immense economic change, great conflict between the old ways and brand new systems, and huge fortunes were made and lost.

The Gilded Age was a period of economic growth as the United States jumped to the lead in industrialization ahead of Britain. The nation was rapidly expanding its economy into new areas, especially heavy industry like factories, railroads, and coal mining.

As daunting as the political challenges were at the time, the Gilded Age came to an end with the reforms of the Progressive era and the New Deal. Those years saw countless changes in the rules of economic life as well as new taxes and social spending.

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In tomato plants, having yellow fruit and dwarf vines is the recessive condition. Having red fruit and long vines is the dominant condition. A cross was done between two plants that were heterozygous for both traits.

What is the probability the offspring will have yellow fruit and dwarf vines?

Answers

Answer:

25% of offspring will have yellow fruit and dwarf vines

Explanation:

denoting that:

D - red fruit, long vines (dominant)

r - yellow fruit, dwarf vines (recessive)

parental phenotype: Red fruit 》 Red fruit

parental genotype: Dr 》 Dr

gametes: (D) (r) 》 (D) (r)

random fertilization: punnet square

D r

D DD Dr

r Dr rr

F1 generation phenotype: Red fruit 》 yellow fruit

F1 generation genotype: DD, Dr, Dr 》 rr

ratio: 3 : 1

percentage: 75% 》 25%

[ the symbol " 》" is used simply as a divider as if all the information were in a table]

How can a cell increase surface area without increasing the volume?

Answers

Cells can increase their surface area by folding the plasma membrane. Total cell surface area should increase when a cell divides into two daughter cells.

There are two illustration of membrane supply that support cell division:

(1) unfolding of small surface membrane reservoirs such as microvilli and folds, and (2) exocytosis of intracellular vesicles.

As the cell radius increases, the surface area increases as the radius squared, but the volume increases as the radius cubed (much faster).

Increasing the surface area of ​​the cell increases the amount of material that diffuses into the cell. As volume and surface area increase, volume increases more rapidly, so for every doubling of cell volume, the surface area available for uptake is halved.

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Stretch your thinking, right, and olve a diviion problem that divide the four digit number by two digit number how did you etimate the firt digit of the quotient

Answers

The first digit of quotient is 7. As first three digits (365) can be divided by 47.

Quotients are the results of dividing two numbers, one by the other. We can take advantage of the fact that division can be seen as multiplication, but with the multiplicative inverse of the denominator.

A 4-digit number must be divided by a 2-digit number.

Place the dividend (3654) beneath the Place of the divisor (47).

The dividend's first two numbers may be (36). 36 cannot be divided by 47 to get a complete number because it is less than 47.

then subtract the dividend's first three digits (365). Seven 47s are contained in the number 365.

(7 x 47=329)

(8 x 47=376).

Place the 7 now directly above the 5 and above the division bracket, and we will get the solution to 77.

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What is the step that is labeled D?
metaphase I
metaphase II
telophase II
telophase I

Answers

Step is labeled D is Metaphase ll.

Answer:

D

Explanation:

The percentage of Americans classified as obese is nearly ___ percent. A. 20. B. 30. C. 40. D. 50.

Answers

The correct answer is The percentage of Americans classified as obese is nearly 40 percent.

According to the Centers for Disease Control and Prevention (CDC), the percentage of Americans classified as obese is nearly 40 percent. This statistic highlights the significant prevalence of obesity in the United States.

Obesity is a condition characterized by excessive body fat accumulation, which can have detrimental effects on overall health and increase the risk of various chronic diseases, including heart disease, diabetes, and certain types of cancer.

The high prevalence of obesity is a public health concern and is associated with numerous factors, including sedentary lifestyles, poor dietary habits, genetic predisposition, and environmental factors.

Understanding the extent of obesity in a population is crucial for healthcare professionals, policymakers, and public health initiatives. This knowledge helps in developing strategies to address the obesity epidemic, promote healthy lifestyles, and prevent obesity-related complications.

It's important to note that the percentage may vary slightly depending on the specific data source and the criteria used to define obesity. However, as of the most recent data available, approximately 40 percent of Americans are classified as obese.

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The equation below shows a process that occurs in all green plants.

carbon dioxide + water + energy → glucose + oxygen

Which statement about this process is true and supported by the equation?

Ⓐ The process does not follow the law of conservation of mass
Ⓑ The process is called cellular respiration
Ⓒ The process does follow the law of conservation of mass and energy is not in the product
Ⓓ The process follows the law of conservation of mass and energy is found in the product

Answers

Answer:D

Explanation: the number of atoms stays the same, and the energy is used to make the products.

When population growth increases in an area, what is happening to the birth rate and age structure of that population?
a. increasing birth rate with a greater number of young organisms
b. increasing birth rate with a smaller number of old organisms
C. increasing birth rate with a smaller number of young organisms
d. increasing birth rate with a greater number of old organisms
Please select the best answer from the choices provided
A
OC
D
Save and Exit
Submit
Mark this and retun

Answers

Answer:

a

Explanation:

the increase in birth rate means more young organisms are born => greater number of young organisms

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Answers

Answer:

i think its increase in precipitation

There are three basic types of_________ , or articulations between bones: fibrous, cartilaginous, and synovial.
joint or joints

Answers

Answer:

the Answer here is joints

so what is the correct amount of electrons that each of the three first orbits can hold?​

Answers

What they said, doing this for points sorry:/

What must the pea and lettuce plants take up through their roots to perform photosynthesis

Answers

Peas and lettuce, both cool-season vegetables, are natural companions. Both appreciate good-quality, reasonably fertile garden soil. Lettuce needs more nitrogen than peas do -- a fact which is happily solved by the fact that pea plants excrete the nutrient through their root systems, fertilizing ne

alkali metals are listed in the first column of the periodic table. this tells you that

a they are highly reactive

b they have only one electron in their outer orbital shells.

c their nuclei contain only one neutron

d both a and b​

Answers

Answer:

B. they have only one electron in their outer orbital shells

what is a membrane potential and how is it generated?​

Answers

Answer:

Differences in the concentrations of ions on opposite sides of a cellular membrane lead to a voltage called the membrane potential. Typical values of membrane potential are in the range –40 mV to –70 mV. ... These concentration gradients provide the potential energy to drive the formation of the membrane potential.

Explanation:

Please mark me the brainliest

he confessed about some stuff that he did. (a) augustus (b) aristophanes (c) aristotle (d) augustine

Answers

The answer to the first question is (C) Herodotus, who is often considered the "Father of History" and was known for his detailed investigations and recordings of events in ancient Greece and surrounding areas.

The answer to the second question is (D) Augustine, who was a theologian and philosopher known for his Confessions, in which he wrote about his own personal struggles and confessions of his past sins.

Herodotus was an ancient Greek historian who is often considered the "Father of History." He was known for his detailed investigations and recordings of events, such as the wars between Greece and Persia.

Herodotus traveled extensively to gather information and was meticulous in his research, which included firsthand accounts, geographical descriptions, and cultural observations. Many consider his work to be the first true historical account, as he attempted to present events in an objective and factual manner.

Augustine of Hippo, also known as Saint Augustine, was a theologian and philosopher in the Roman Empire. His most famous work is Confessions, which is an autobiographical account of his life, struggles, and religious conversion.

In Confessions, Augustine wrote about his own personal struggles and confessions of his past sins, including his previous adherence to the Manichaean religion, his involvement in a love affair, and his struggles with pride and temptation.

Confessions is considered one of the greatest works of Christian literature and is often studied for its insights into human nature and the human experience of faith.

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CORRECT QUESTION

His research or investigations might have been the first of

their kind or something close to that.

(A) Hesiod

(B) Euclid

(C) Herodotus

(D) Homer

He confessed about some stuff that he did.

(A) Augustus

(B) Aristophanes

(C) Aristotle

(D) Augustine

What type of stress is strike-slip fault?

Answers

A strike-slip fault is a type of tectonic stress associated with lateral movement.

In a strike-slip fault, the two sides of the fault move horizontally past each other, typically in a horizontal direction. This type of movement is caused by shear stress, which occurs when two masses of rock are subjected to opposite horizontal forces.

Strike-slip faults are commonly found in areas where tectonic plates are moving past each other, such as along the San Andreas fault in California. They can also be found in regions with transform plate boundaries, where two plates are moving in opposite directions parallel to each other.

The movement along strike-slip faults can cause earthquakes, and they are often associated with some of the most intense and destructive earthquakes in the world.

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Directions: Select the correct graph. A moth population living in adeciduous forest relies on camouflage to protect itself from predators.These moths typically vary in color and are thus able to camouflage amongboth the light- and dark-colored trees of the forest. However, as sootemitted from nearby factories darkens the forest's trees, the mothpopulation begins to evolve. Which of the following distribution graphsbest represents the evolution of this moth population?A.B.C.orD.

Directions: Select the correct graph. A moth population living in adeciduous forest relies on camouflage

Answers

In the graph, we can see how the original population ranged the same in each case, but considering the soot caused white moths to be more clearly spottable, and the black moths more imperceptible, the evolved population presented then a variation with respect to the original one. The graph that better represents this, is the first one, the A graph, since there we can see how a higher number of moths are restricted to the black moth part of the graph, than in the other graphs.

When dealing with ____________ it is important to educate consumers so that they do not fall victim to greenwashing/marketing schemes.

Answers

When dealing with Ecolabelling , it is important to educate consumers so that they do not fall victim to green washing/marketing schemes.

Ecolabelling (also "Eco-Labels") and Green Stickers are labelling systems for food and consumer products. The use of Eco labels is voluntary, whereas green stickers are mandated by law.

Some labels quantify pollution or energy consumption by way of index scores or units of measurement, while others assert compliance with a set of practices or minimum requirements for sustainability or reduction of harm to the environment. Many ecolabels are focused on minimising the negative ecological impacts of primary production or resource extraction in a given sector or commodity through a set of good practices that are captured in a sustainability standard. Through a verification process, usually referred to as "certification", a farm, forest, fishery, or mine can show that it complies with a standard and earn the right to sell its products as certified through the supply chain, often resulting in a consumer-facing ecolabel.

Ecolabelling systems exist for both food and consumer products. Both systems were started by non-governmental organizations (NGOs).

At least for food, the ecolabel is nearly identical with the common NGO definition of the rules for ecolabelling. Label trust is an issue for consumers because some manufacturers and manufacturing associations have set up "rubber stamp" labels to greenwash their products with fake ecolabels. High trust levels can be created when ecolabels apply for governmental recognition as formal Certification Marks (recognized by logos or names with 'CTM', CM or 'CertTM'). Typically this means schemes approved as a Certification Mark have had the government department responsible declare that the scheme has a standard and certifies that they are 'Competent to Certify'.

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Find the area inside the cardioid =6−4cos(theta).

Answers

Numerous natural formations display the cardioid shape, which has biological relevance, which is determined by the equation r = 6 - 4cos().

The form of some animal hearts, including those of some cephalopods and sea gastropods, is one striking example. These species' cardioid-shaped hearts have developed to help them efficiently pump blood throughout their bodies. Their physiological demands are supported by the high blood flow that is maintained by the cardioid shape's narrowing apex. Additionally, certain flower species, such as several cyclamen species, have a cardioid-like arrangement of their petals. By offering an ideal landing site, its design helps to draw pollinators. The cardioid shape thus exhibits functional modifications for circulation and reproduction in biology.

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--The complete Question is, What is the biological significance of the cardioid shape in nature? Explain any patterns or phenomena observed in biological structures that resemble or approximate a cardioid shape. How does the equation for the cardioid, given as r = 6 - 4cos(θ), relate to these biological structures? Discuss any potential implications of the equation for understanding the functions or adaptations of organisms that exhibit cardioid-like structures. Provide examples of organisms or biological systems where the cardioid shape is prominent and explain how this shape benefits their survival, reproduction, or other biological processes. --

A large, old tree deep in the forest was knocked down in a windstorm. as it fell, it pushed four other somewhat smaller trees down with it, opening up quite a large patch of sunlight in an area that had been shady for many decades. what is most likely to happen in the sunny patch in terms of plant growth? no plants will be able to grow in it until neighboring trees shade it more. seeds of sun-loving plants will germinate and grow in it. primary succession will start with very small plants or lichens. shade-loving plants will grow in it, since it is in the forest.

Answers

Seeds of sun-loving plants will germinate and grow in it.

Gap dynamics in forests

Forests generally have different layers of trees. Thus, the ground layer of forests is usually barren or dominated by a few shade-tolerant plant species.

When gaps emerge in an otherwise close canopy either naturally or by other means, the dynamics of plant population on the ground layer change.

If the ground layer is barren before due to shade, propagules of sun-loving plant species will colonize and begin to germinate in the gaps. If the layer has some shade-tolerant herbs before, competition for space starts between the sun-loving and shade-tolerant species.

With time, the shade-tolerant species die off and are replaced by sun-loving plant species.

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Answer:  Seeds of sun-loving plants will germinate and grow in it.

Explanation:

pretty simple


more sun= more sun

plants who need more sun will grow more

plants who need more shade wont do as well hence the name

primary sucession has nothing to do with this

no plants will grow isnt true cuz it literally says there is more sun and there is more space

just use process of elimination


Which of these is a function of the parasympathetic nervous system (PNS)?
A
increasing the blood flow to the muscles
B
C
decreasing the heart rate
stion 2
dilating the pupils
D relaxing the bladder

Answers

Answer:

D

Relaxing the bladder.

<3

HELO ME PLEASE IM BEING TIMED

HELO ME PLEASE IM BEING TIMED

Answers

I believe it’s D but it’s definitely either B or D

Which of the following is the most important characteristic that biologists use to classify animals?
where the animal lives
the animal's body structure
how long the animal lives
O population size of animal

Answers

Answer:

The animal's body structure

Explanation:

Because all classes or animals have different body types.

Birds, class Avis, have feathers and lay eggs.

Salamanders, class amphibia, have smooth or slimy bodies.

Snakes, class reptilia, have scales and forked tongues.

what type of cellular transport occurs to balance the salinity lives inside and outside the fish cells
A. Passive Transport
B. Active Transport

Answers

Answer:

A

Explanation:

Hopefully this helps.

True or false cooler material in the asthenosphere faces towards lithosphere

Answers

Answer:

the answer is yes hope this helped

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Whats the correct answer answer asap for brainlist Solve AGHI. Round the answers to the nearest hundredth.A. m/Gs 61.93, m1s 28.07, HI = 15B. m/Gs 28.07, m/1 61.93, HI = 18.79C. m/Gs 61.930, m1 28.07, H/= 18.79D. m/G 28.07, m/1 61.93, HI = 15 Identify the coordinates for point E. Type your answer in the form (#,#), without spaces. In what art movement was the The Bicycle wheel by Marcel Duchamp made? DadaNeoclassicism Expressionism 5 3/10x-1/5(x-y) pls help During a football workout two linemen are pushing on the coach and the sled. The combined mass of the sled and the coach is 300 kg the coefficient of friction of between the sled and the grass is. 800. The sled accelerates at a rate of. 580 m/s/s. Determine the force applied to the sled by the lineman Is this correct please explain how can I solve for x? Answers ASAP 2. When do the two middle terms add to zero? Amanda is 12 years old. She is 2/7 times as old as her father. How many years ago was her father 4 times as old as Amanda? chris, a coder for drones inc., learns of undisclosed company plans to market a new, smart drone. chris buys 1 ,000 shares of the firm's stock. if chris is liable under the securities exchange act of 1934, it will be because the information on which he based his purchase of the stock was: In a healthy relationship, people seldom respect and support each other. in a healthy relationship, people seldom respect and support each other. a. true b. false Lacey's favorite brand of cereal comes in a 20-ounce box. The manufacturer of thecereal requires a tolerance of 0.5 ounces--that is, as long as the box of cereal is within0.5 ounces of 20 ounces, the box can be sent to the store to be soldWrite an absolute value inequality that describes the acceptable weights, w, of a 20-ounce box of cereal. Explain how you came up with your inequality, Let the vector \mathbf{v}v have an initial point at (1, -2)(1,2) and a terminal point at (0, 0)(0,0). Plot the vector \mathbf{v}v and afterwards follow the guided steps to analyze the vector. Suppose = (-1,-3,-4) and 7=(-4, 2,-2). Then (Use notation for your vector entry in this question.): 1. The projection of u along 7 is 2. The projection of u orthogonal to 7 is: What is meant by a man of letters? The table shows the values of f(x) and g(x) for different values of x. One of the functions is a quadratic function, and the other is an exponential function.x f(x) g(x)2 9 93 15 274 23 815 33 243Which function is most likely increasing quadratically? ag(x), because it will not intersect f(x) bg(x), because it grows slower than f(x) cf(x), because it grows faster than g(x) df(x), because it grows slower than g(x) help, i do NOT know this one, please help:What happened to the people who did not make it back alive? (Call of the Klondike: A True Gold Rush Adventure assignment)good luck on this. 23/(4 ) [31/( 8 ) { 5 ( 42/( 3) 11/(12 ) )}] according to research by emily pronin and others (2007), which of the following statements explains why people perceive others to be more conforming than they, themselves, are?