what was the key factor that allowed Hershey and Chase to show that DNA alone carried the genetic information of a bacteriophage?
Explanation:
DNA contains phosphorus, but protein does not. Protein contains sulfur, but DNA does not. This allowed radioactive phosphorus and radioactive sulfur to identity each molecule specifically.
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[tex] \mathfrak \fcolorbox{green}{red}{BE \: BRAINLY }[/tex]
In the DNA structure there is phosphorus present while protein does not contain phosphorus but it contains sulfur while DNA does not which allowed radioactive phosphorus and radioactive sulfur to identity each molecule specifically.
What is Hershey and Chase experiment?Hershey-Chase experiment was the final experiment which is also called as the Waring Blender experiment. In this experiment, they showed that phages only injected their DNA into host bacteria, and that the DNA served as the replicating genetic element of phages.
They used this experiment to prove that DNA is the genetic material. [tex]T_2[/tex] Bacteriophage that was grown in isotopic medium radioactively labels a specific viral component. Two types of isotopic media were used.
Viruses that were grown in radioactive sulfur (35S) contained radiolabeled proteins.Viruses grown in radioactive phosphorus (32P) had radiolabeled DNANext, the virus was allowed to infect a bacterium (E. coli) and the virus and bacteria were then separated through centrifugation. After centrifugation, the larger bacteria formed a solid pellet, while the smaller viruses remained in the supernatant. The pellet of bacteria was found to be radioactive when infected with 32P-virus (DNA), but not with 35S-virus (protein).
This provided proof that DNA was the genetic material because DNA had been transcribed into bacteria, not proteins.
Thus, in the DNA structure there is phosphorus present while protein does not contain phosphorus but it contains sulfur while DNA does not which allowed radioactive phosphorus and radioactive sulfur to identity each molecule specifically.
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Help, please I'll give brainless but the answer got to make sense
Answer:it’s a machine to weave cloth
Reason: there was too much demand to do it by hand
Importance: it’s important because it changed the way people worked in the textile industry as they didn’t have to weave cloth by hand anymore and it saved tons of time
Reason: there was too much demand to do it by hand
29 The picture shows a Ferris wheel and a schematic diagram of it with different parts marked. Direction of movement of the Ferris wheel Axis of the Ferris Crossbar from which wheel at the chaircar hangs the centre Chaircar Ferris wheel Schematic diagram of a Ferris wheel Each chaircar hangs from a crossbar. As the Ferris wheel rotates on its axis at the centre, each chaircar remains in an almost UPRIGHT position so that people sitting in it do not fall off. For this to be possible, which of the following is absolutely necessary? A. The chaircars should be fixed rigidly to the crossbar. B. The chaircars should be free to turn about the crossbar. C. The Ferris wheel should always rotate at a fixed speed. D. The Ferris wheel should always turn in the same direction.
Answer:
d
Explanation:
this will not confuse people in it since it always turn in the same direction
I think the answer is
D the ferris wheel should always
turn in the same direction
How body responds when the body temperature increases
When body temperatures rise, the body reacts by increasing blood flow to the skin's surface, taking the heat from within the body to the surface. This means sweat. As the sweat evaporates, the body cools down.
Students place a plant in a dark, windowless closet for two days. Which of these will help the plant maintain homeostasis?
a
decreasing stem size
b
losing all of its leaves
c
using stored sugars
d
growing deeper roots
Answer:
use stored sugar for energy
How does the earth's tilt affect weather? ○The sun changes the amount of heat it radiates. ○The earth changes its revolutions around the sun. ○The earth takes longer in completing rotations allowing for areas to heat up or cool off more. ○The sun revolves around the earth in a strange pattern. ○The tilt of the earth affects how directly the sun's rays hit different parts of the earth.
Answer:
The answer is the tilt of the earth affects how directly the sun's rays hit different parts of the earth.
I need help on 3 Factor that affects population thingy. I don’t understand anything :(.
Answer:
Population growth (I think because birth rates, death rates affect populations)
Dispersion: There are three types of population dispersion are uniform dispersion, random dispersion, and clumped dispersion.
example question: "Describe the types of population dispersion, with examples, and the factors that influence them."
(I'm using this as a example to explain dispersion)
(things that affect dispersion) - Water supply, climate, shape of the land, vegetation, soils and availability of natural resources. In uniform dispersion, individuals of a population are more or less evenly distributed for example, allelopathy plants. In random dispersion, individuals are distributed randomly in the ecosystem for example, dandelions plants. Clumped dispersion is when individuals in a population are clustered together for example, pine trees. (or any forest)
Explanation:
Birth rates are a major factor because it is a continuous way for a population to grow, if you have low birth rates and high morality (Death rates) a population wont be balanced and death would largely out number the morality rate and time span of a population. That being the older population dies quickly because there is no younger populations to help them. This can lead to extinction too. Immigration is a population or group moving to the current one, it impacts population because its a very large group of new species being introduced to the current one adding numbers. This can also be bad because some immigrated species could be invasive and kill or take over the current/native species.
Example:
Algae blooms can reduce the ability of fish and other aquatic life to find food.
What controls the amount of herbivores? Producers or predators? Explain
Answer:
Predators
Explanation:
Because they eat all the meat so if they wanted to they could eat the predators controlling the lesser amount
I’m confused with this question :(
Can anyone help?
who has a better sense of smell, dogs or lions ( i dont know if the subject is right )
Answer:
dog
Explanation:
Answer:
cats smell better than dogs by a landslide and since a lion is a cat, you can say lions smell better.
Explanation:
Students were given a list of seven elements and asked to identify the four elements that are most abundant in biomolecules. Which table correctly identifies the four most-abundant elements in biomolecules?.
Answer:
Carbon, hydrogen, nitrogen, oxygen
Explanation:
Not sure what the tables are?
Biomolecules are important for living organisms and vital for cell structure and functioning. The cells are made up of biomolecules as their structural organization.
The four most abundant biomolecules are:
Carbon, Oxygen, Nitrogen and Hydrogen
The biomolecules can be explained as:
The central biomolecules for life activities are these elements that contribute to major processes.The main building blocks like carbohydrate is composed of carbon, oxygen and hydrogen. They provide energy to the body by breaking into small molecules.Proteins are vital for cell signalling and transport. They are composed of amino groups consisting of nitrogen.Therefore, carbon, nitrogen, hydrogen and oxygen are the most abundant biomolecules.
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Which of the following happens during interphase?
Answer:
Interphase is the portion of the cell cycle that is not accompanied by gross changes under the microscope, and includes the G1, S and G2 phases. During interphase, the cell grows (G1), replicates its DNA (S) and prepares for mitosis (G2). ... In interphase, the cell gets itself ready for mitosis or meiosis.
Explanation:
Answer:DNA replication takes place making two identical copies of the genome of the cell.
Explanation:
how can you distinguish the dorsal from the ventral horns
Overpopulation can result from _____________
Answer: Overpopulation can result from low mortality rate.
Explanation: Population change is caused by a balance in birth rate and death rate. If the death rate decreases, it will cause a growth in population. I hope this answer helps.
We eat food for energy. What is the source of energy for this food chain?
A) the sun
B) the grass
C) decomposers
D) all the animals
Which of the following facts is the best example of molecular DNA evidence that
supports the Theory of Evolution?
A. Humans and chimpanzees share between 95% and 98.5% of their DNA.
B. The embryos of humans and chickens share similar features early in development.
C. Humans, penguins, alligators, and bats all share forelimbs with homologous structures.
D. In the fossil record, plants are found below reptile fossils. Im guessing that its A
Answer: A I think.
Explanation:
Cuz M O N K E S Are just like humans!
I think the answer is A since human beings evolved from an ape
Plants can break large rocks into tiny pieces. How is it possible for plants to be able to mechanically weather rocks by breaking them into smaller pieces?
The roots of the plant grow into the cracks of the rock forcing the rock to break.
O The plant absorbs all the water from the soil leaving the rocks dry and brittle.
O The plant wraps itself around the rock and forces it to crumble.
The acidity of the plant forms new types of smaller rocks.
Answer:
The roots of the plant grow into the cracks of the rock forcing the rock to break.
Explanation:
Hope this helps
Why a cell spends the majority of its time in interphase.
A cell spends the majority of its time in interphase because during this period the cell grows and synthesizes materials required during and after its division. During interphase, the cell duplicates its genetic material.
The cell cycle can be divided into a long interphase and a short mitotic (M) phase.
The interphase can in turn be divided into three phases: Growth 1 (G1) phase, Synthesis (S) phase and Growth 2 (G2) phase.
During the S phase, the cell duplicates its genetic material, which is sharply controlled by different cellular mechanisms (e.g., checkpoint mechanisms).
During G1 and G2 phases, the cell synthesizes all the proteins required during the M phase and after cell division.
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Carbon is rare in that it does NOT bond with any other elements.
Select one:
True
False
Answer:
False
Explanation:
-Carbon has 4 electrons in its outer shell
-It can achieve a full outer shell by forming Covalent Bonds
After an extreme disturbance, ecological succession ultimately causes the
O A. populations of each species to keep growing
B. biodiversity to increase
O C. ecosystem to become less stable
D. biodiversity to decrease
Answer: B biodiversity to increase
Explanation:
How are seeds produced
Answer:
From other seeds
Explanation:
They grow more seeds form the one seed
Answer:
From plant reproduction.
Explanation:
Plants produce flowers to make seeds. To make a seed a flower must be pollinated. Pollen from the male part of one flower travels to the female part of another flower where the seeds are made. Most, but not all plants, have both male and female parts inside one flower. The stigma is usually in the centre and the stamens, which produce the pollen, cluster around it. The petals act like an advertisement to attract various animals, which will carry the pollen from one flower to another.
HELP ME!!! ASAP!
Why do you think that diagnosing a parasite infection can be difficult in some cases? What factors would make it challenging?
Answer:Diagnosis of any stool parasite may be difficult by submitting several stool specimens, your chance of being diagnosed correctly is higher than by submitting just one sample. If you receive a negative lab report, your physician may choose to send another sample to a different lab for confirmation.
Explanation:
The most common elements for
life are CHONP.
The letter N symbolizes the
element...
A. nether.
B. nitrogen.
C. non-biotic.
The letter N in the most common elements for life CHONP indicates (B) Nitrogen.
Elements are the smallest unit that cannot be broken down further. Each element comprises of specific protons, neutrons and electrons. These elements are essential for living organisms as well. The most common elements inside living body are: CHONP, i.e., Carbon, Hydrogen, Oxygen, Nitrogen and Phosphorus.
Nitrogen is the element in the periodic table with an atomic number 7. It is a very essential element in living organisms because it acts as an important constituent of compounds like nucleic acids, amino acids, proteins, etc. In plants it is a part of chlorophyll.
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The Mauna Loa Observatory in Hawaii has been collecting data about the
atmosphere and climate since the 1950s. The graph below shows some of
their findings. What conclusions can you draw by studying the above the graph?
options:
climate change is a natural process
all climate change is caused by humans
the levels of carbon dioxide in the atmosphere have been increasing since the 1960s
the levels of carbon dioxide in the atmosphere have been decreasing since the 1960s
Answer:
These search terms appear in the result: mauna, loa, observatory, hawaii, has, been, collecting, data, atmosphere, climate, since, 1950s, graph, shows, some, their, findings, conclusions, can, you, and draw
name at least four process that
are common to most living things
organization, metabolism, responsiveness, movements, and reproduction.
Individuals, as well as industry—and automobile manufacturers in particular have an obligation to work to reduce carbon dioxide emissions that may increase the level of greenhouse gases in the atmosphere. Agree or disagree
It is right that individuals, as well as industry—and automobile manufacturers, in particular, have an obligation to work to reduce carbon dioxide emissions that may increase the level of greenhouse gases in the atmosphere.
Carbon dioxide is a greenhouse gas, which means that it traps heat in the atmosphere. This can lead to climate change, which is already having a number of negative effects on the planet, such as rising sea levels, more extreme weather events, and changes in plant and animal life.
Individuals can reduce their carbon dioxide emissions by making changes to their lifestyle, such as driving less, using less energy at home, and eating less meat. Industry can reduce their carbon dioxide emissions by investing in new technologies, such as renewable energy and energy efficiency.
Automobile manufacturers have a special responsibility to reduce carbon dioxide emissions, as cars are a major source of greenhouse gases. They can do this by designing more fuel-efficient cars and by using alternative fuels, such as electric and hybrid cars.
It is important for everyone to do their part to reduce carbon dioxide emissions. By working together, we can help to protect the planet for future generations.
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what is the answer for each box 50 points
halo salam kenal dr indonesia :)
salam kenal :)
a circle fence sourrounding a small yard mesure 84 meters in length if you walk from one side from the other through the middle what is the distance across the small yard
Answer: 26.75 meters.
2πr = 84
2 * 3.14 * radius = 84
radius = 84/6.28
r= 13.375
So the diameter will be 13.375 + 13.375 which is 26.75 meters.
2 pts
Question 3
All of the following are principles of the cell theory EXCEPT
water is the main ingredient in every cell
a
bo the cell is the smallest unit of life
C o all new cells come from preexisting cells
do all living things are made of one or more cells
Answer:
A (if it is a multi-answer question) also B. Even also C.
Explanation:
C is definitely not the correct answer because germs and microbes are living things and are made of only 1 cell. The cell is also the smallest unit of life because it is called "the building blocks of life", so it has to be the smallest unit of life. Even C, because cells multiply using an existing cell, just like we humans reproduce. First, it duplicates all of its parts, or contents, including the DNA, then they split to create a new cell, (or if i'm incorrect, 2).
Use the chart to help.
In a controlled environment,
can be used to slow the decay process in foods.
A. gamma rays
B. infrared radiation
C. microwaves
D. x-rays
Given what we know, we can confirm that both gamma rays and x-rays can be used to slow the decay process in foods.
What are gamma rays and x-rays?Both of these are forms of ionizing radiation. Applying these to food is known as food irradiation. What this accomplishes, is that the food that is irradiated will have its chemical bonds altered, slowing the decay process.Therefore, since both gamma rays and x-rays offer ionizing radiation to the food, which affects the chemical bonds and allows the food to have a longer shelf life, we can confirm that they can be used to slow the decay process in foods.
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