What did Erwin Chargaff discover?

Answers

Answer 1

Answer:

Erwin Chargaff was one of those men, making two discoveries that led James Watson and Francis Crick to the double helix structure of DNA. At first, Chargaff noticed that DNA – whether taken from a plant or animal – contained equal amounts of adenine and thymine and equal amounts of cytosine and guanine


Related Questions

There are many stars in the; our sun is one of them during the day, we cannot see the other stars in the sky. However, at night, we can see the other stars in the sky which is a reason why we only see our sun during the day time and other stars at night? A. The sun is the biggest star B. The sun is the closest to earth C. The sun is the brightest star D. The sun has the most gravity

Answers

Answer:

c

Explanation:

Why don't substitutions cause a change in the amino acid sequence of a protein

Answers

Answer:

DNA is constantly changing through the process of Mutation...

Couples who both have normal colour vision and have a child with colour blindness. Explain how this may happen, and state that the sex of the colour blind child must be.​
Please help me

Answers

Answer:

Im not sure what state but that is my reason

Explanation:

Maybe it has to do something with there gens or someone eles in there family ahd it and maybe it just got passed down to the baby instead of the parents i hate to say this but sometimes that happens.

HELP I NEED HELP ASAP
HELP I NEED HELP ASAP
HELP I NEED HELP ASAP HELP I NEED HELP ASAP
HELP I NEED HELP ASAP
HELP I NEED HELP ASAP

USING THE PICTURE, FILL IN THE BLANK WITH EACH LETTER.

___ 1. Snow Precipitation
___ 2. Rain Precipitation
___ 3. Evapotranspiration
___ 4. Stream Flow/ Surface Runoff
___ 5. Sublimation
___ 6. Infiltration
___ 7. Groundwater Flow
___ 8. Groundwater Storage
___ 9. Fresh Water Pond
___ 10. Ocean
___ 11. Evaporation

Answers

Answer:

This is in-order:

D

E

B

F

C

I

G

H

J

K

A

which statement best describes the organization of the taxa shown in the image
A. as you move down the structure, the groups become more general
B. there are more organisms in each group as you move down the structure
C. as you move up the structure the group becomes more specific
D. as you move down the structure, there are fewer organisms in each group

Answers

Answer:

D. as you move down the structure, there are fewer organisms in each group.

Explanation:

When we move down from kingdom to species, the number of organisms decreases because more closely related organisms are placed down the group. There are fewer kingdoms that have a large number of organisms in it and has less similarities among them and when we move down, the number of organism decreases in number and at the end there are few organisms are present in it which is more closely related to each other.

PLEASE HELP WILL GIVE BRAIN!! The small dark cylinder shaped structures that help separate the chromatids are called !!

Answers

Answer:

Centrioles

Explanation:

Every animal-like cell has two small organelles called centrioles. They are there to help the cell when it comes time to divide. They are put to work in both the process of mitosis and the process of meiosis.

The small dark cylinder shaped structures that help separate the chromatids are called Centriole Structure.

Select the correct answer from each drop-down menu. Bile juices help in the breakdown of fats. An injury to the may cause a decrease in the production of bile juices. This decrease in bile juices may lead to decreased production of .

Answers

Answer:

Decreased production of energy.

Explanation:

Decrease in bile juices may lead to decreased production of energy from eating of food having fats because our body has no ability to absorb fat-soluble vitamins and fatty acids. Bile juices is responsible for the absorption of fat-soluble vitamins and fatty acids which is then transported to the cell for producing energy that is required by our body for different processes. Fats have more energy than carbohydrates and protein so if there is no bile juices are present so it break down does not occurs.

Answer: A and C

Explanation:

One theory of early life on Earth states that the first life forms did not use oxygen for respiration and were unable to make their own food. Based on this theory, which types of organisms were most likely present?


aerobic, autotrophic bacteria


aerobic, heterotrophic bacteria


anaerobic, autotrophic bacteria


anaerobic, heterotrophic bacteria

Answers

Answer:

Early organisms would have to be anaerobic, as air was likely non existent. This rules out the first two options.

Autotrophic can be called producers, and heterotrophic can be called consumers.

The question states that "did not use oxygen for respiration and were unable to make their own food"

Only one option satisfies the question:

anaerobic, heterotrophic bacteria

Answer:

Anaerobic, heterotrophic bacteria

Explanation:

i got it right on k12

please help..........​

Answers

It’s the last one okay

True or False: Evolution can occur at the organismal level.

Answers

Answer: Das true dude!!

PLEASE HELP!!
Which sector creates the most fossil fuel emissions?

agriculture
transportation
electricity generation
industry

Answers

Answer:

Transportation

Explanation:

...............

What is modified poliovirus?

Answers

Explanation:

Poliovirus, the causative agent of polio (also known as poliomyelitis), is a serotype of the species Enterovirus C, in the family of Picornaviridae.

Native polio virus which helps boost your immune system

Before a cell divides, it makes a copy of its genes during

Answers

Bedford a cell divides, it makes a copy of its genes during interphase

During the interface The cell grows to its major size makes a copy of its DNA and prepares to divide into two cells

What is the role of retina?​

Answers

The role of the retina is to receive light that the lens has focused. It then converts the light into neural signals which get sent to the brain for visual recognition.

Answer:

It is where images are formed.

Explanation:

The retina has two light sensitive cells;

rods- responsible for dim light.

cones- responsible for bright light

2. Explain the relationship between genetic variation and an organism's ability to adapt to its environment,​

Answers

Because natural selection acts directly only on phenotypes, more genetic variation within a population usually enables more phenotypic variation. Some new alleles increase an organism's ability to survive and reproduce, which then ensures the survival of the allele in the population.

What distinguishes the brain from the spinal cord?

Answers

The spinal cord is a single structure, whereas the adult brain is described in terms of four major regions: the cerebrum, the diencephalon, the brain stem, and the cerebellum. A person's conscious experiences are based on neural activity in the brain.

Answer:

The brain controls voluntary processes.

Explanation:

The brain and the spinal cord are both parts of the central nervous system, but the spinal cord controls only involuntary processes.

witch part of the plant gives leaves their green color

Answers

Answer:

The substance that gives plants green color is chlorophyll. Chlorophyll is a chemical found in organelles called chloroplasts in the cells of green plants. The chlorophyll uses the energy from the sun to produce glucose and oxygen from carbon dioxide and water in a process called photosynthesis.

Explanation:

HOPE THIS HELPS

TAKE CARE

HAVE A NICE DAY

Answer:

Chlorophyll.

If you are asking about the part, chloroplasts are the answer.

PLS HELP! A single celled organism that lives in extremely hot or acidic environment with no membrane-bound organelles most likely belongs to

1. archaea, bacteria, and eukarya
2. archaea and bacteria
3. archaea only
4. bacteria only​

Answers

Answer:

i thinks its 4 but i am not that positive

A single celled organism that lives in extremely hot or acidic environment with no membrane-bound organelles most likely belongs to archaea, bacteria, and eukarya. Thus, the correct option is 1.

What are Single-celled organisms?

A unicellular organism is also known as a single-celled organism. It is an organism which consists of a single cell, unlike a multicellular organism that consists of multiple eukaryotic cells. Organisms fall into two major categories including prokaryotic organisms and eukaryotic organisms.

All of the life forms can be divided into three major domains, based on the type of cells of the organism into

a. Bacteria: These cells do not contain a nucleus.

b. Archaea: These organisms do not contain a nucleus, however they have a different cell wall from bacteria.

c. Eukarya: These cells contain a well-defined nucleus

Therefore, the correct option is 1.

Learn more about Single-celled organisms here:

https://brainly.com/question/29188904

#SPJ6

Deoxyribose (sugar), a phosphate group, and a nitrogen base make up these repeating units of DNA: * Adenine, Nucleotides, Guanine or sMitochondria ​

Answers

Answer:

in DNA. Adenine (A) and guanine (G) are double-ringed purines, and cytosine (C) and thymine (T) are smaller, ... The nucleotide is named according to the nitrogenous base it contains. (a) Each DNA nucleotide is made up of a sugar, a phosphate group ... A figure showing the structure of ribose and deoxyribose sugars.

Explanation:

The highest level of organization in an organism is

Answers

Answer: The biosphere

Explanation:

Answer:

Biosphere

Explanation:

because it encompasses all the other levels and also the biological levels of organisation of living things . Hope it is helpful and have a good luck

The number of times your heart beats in one minute is referred to as your _____________.
endurance

heartbeat

heart rate

strength

Answers

Answer:

heart rate

Explanation:

I believe it would heart rate because the other don’t really make that much sense

Can someone please help me

Answers

Answer:

Oldest = e

newest = d

if a specific variant of a character was passed down to its offspring, which of the fallowing is the offspring inheriting
A. a recessive trait
B. a dominant trait\
C. a trait.
D. a disorder

Answers

C it should be a trait

The steeper the river is, the slower the water moves.

Answers

Answer:

That Sounds about right...

Explanation:

God said so

please answer ill give brainly

Answers

25mm=2.5cm and so 2.5 times 2 is 5cm so D

Which statement is true?
O Gravity can both push and pull objects.
O Only celestial objects exert a gravitational force.
O Only Earth exerts a gravitational force.
All objects with mass exert a gravitational force.

Answers

Answer:

All objects with mass if I remember correctly :>

Explanation:

When the solution contains the same number of particles as what’s in the cell ______________

Answers

Answer:

isotonic solution

Explanation:

Why do smokers find it harder to give up smoking? ​

Answers

Answer:

Nicotine is the main addictive drug in tobacco that makes quitting so hard

Answer:

It is hard for them because that's what makes them feel better and that is what the want each time they are stressed or they can even smoke 20 times in a hour.

Explanation:

Hope i helped :)

What role did the Yam play in the expansion of the Mongol Empire?

Answers

Answer:

The yam was the cornerstone of Mongol administration and allowed the Great Khan to run one of the largest empires in history.

Explanation:

Answer:

The yam was the cornerstone of Mongol administration and allowed the Great Khan to run one of the largest empires in history.

Explanation:

that is your answer, have a great day!

What type of transport is being shown in the image below?
Glucose molecules
O Osmosis
O Facilitated diffusion
O Diffusion
O Active transport

Answers

Facilitated diffusion
Other Questions
please help times running out Find the sum of the measures of the interior angles of a convex 45-gon. When a car slams on breaks, a book in the seat of the car slides forward. What terms describes why that happens? Carbon dioxide and oxygen are both ___ found in the air. HELP, what do I put in the 3 boxes below? Please select the best answer from the choices provided ASAP Explain the purpose of the afterword included at the end of Into the Air and the authors most likely purpose for including it in the text. (GIVING BRAINLIEST!!!!!!!!!)There were two sides of this war. Some wanted the war and others didnt. Who wanted the war? Why? Who did not want the war to occur? Why not?(Pls keep the answer short :D) Guys pls help i only have 20 mins left ;( Help can someone do this problem and explain how they got the answer why do some people not believe in life after death? Michael tracks his pay. He has already earned $97.75. He determined that the expression 97.75+17.80h represents the amount of money, in dollars, he has earned at hours. Based on the given expression, about how many hours does it take Michael to earn 678.25? Which graph shows the solution to the system of linear inequalities?2x 3y Select all equations that match the solution for this equation: 5(x - 12) = 20 60 + 20 51/5(60 + 20)(16 + 20) 5(16 - 12) 51/5(75 - 63 Find the greatest common factor of 30, 70, and 20. can you help me pls it's only 3 question's Simplify the expressions by combining like terms-3d + 8d - 5d I really need help...Will mark brainiest Everyone says that Jesse is a natural communicator. What does that mean? If another sample of size 100 is taken, what is the probability that its sample mean willbe greater than 2.56 in?