1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Gwar [14]
3 years ago
7

In a famous experiment, Matthew Meselson and Franklin Stahl grew E. coli cells in a medium containing only the "heavy" isotope o

f nitrogen, 15 N . These cells were then transferred to a medium with the "light" isotope of nitrogen, 14 N . The results of the experiment supported the hypothesis of semiconservative replication, which was proposed by Watson and Crick.
Biology
1 answer:
mafiozo [28]3 years ago
6 0

Answer:

The experiment of Meselson and Stahl test the semi-conservative replication

Explanation:

As a context, it can be noted that after the discovery of the double helix by James Watson and Francis Crick, two new theories of DNA replication appeared against the semi-conservative theory that these scientists proposed: on the one hand, the conservative theory was believed, that he postulated that the DNA of the stem cell maintained the two original chains after mitosis; on the other was the scattered theory that held the fragments of the stem cell DNA and synthesized DNA mixed together.

The objective of the experiment of Meselson and Stahl was the discovery of the theories mentioned above was really true. For this, scientists use the <em>E. coli</em> bacteria. They also used the N15 nitrogen isotope. The chemist is one of the fundamental elements of DNA. Thanks to this experiment it was shown that the theory of semi-conservative DNA replication proposed by Watson and Crick was correct.

You might be interested in
Choose all the pieces of individual evidence.
faust18 [17]
Criminal evidence is any physical or verbal evidence presented in court to prove a specific crime. Evidence can take different forms and can be used by the accused to prove innocence. Admissible evidence, moreover, is the use of testimony (oral or written such as affidavit), exhibits (physical objects), documentary material or demonstrative evidence ( in the form of representation of an object including photos, x-rays, videotapes, movies, sound recordings, diagrams, forensic animation, maps, drawings, graphs, animation, simulations or models). All are presented before a judge or jury to prove a point or element in a case. In the choices above, six of them can qualify as individual evidence except numbers 3. Number 8, however, is questionable since it has incomplete description as to where and how is the paint was chipped. 
4 0
3 years ago
Does the population size increase or decrease at higher trophic levels in the pyramid
coldgirl [10]
You know this! Let me walk you through! First, define a trophic level.
7 0
3 years ago
Read 2 more answers
In blood clotting, the platelets __________ to initiate the clotting process.
Marina CMI [18]

There are so many examples for that in different areas, like TPBi experiment carried out in our lab recently.Here's one link: http://www.alfa-chemistry.com/tpbi-cas-192198-85-9-item-282866.htm

4 0
3 years ago
Read 2 more answers
As a cow grazes on grass how much of the grass is energy is transferred to the cow
pantera1 [17]

Answer:10 % I'm pretty sure

Explanation:

3 0
3 years ago
Read 2 more answers
The observation that members of a population are uniformly distributed suggests that A. resources are distributed unevenly. B. t
ANEK [815]

The observation that members of a population are uniformly distributed suggests that   the members of the population are competing for access to a resource.

Option B is correct.

What is a resource ?

A resource is any physical material constituting a part of Earth that people need and value. Natural materials become resources when humans value them. The uses and values of resources change from culture to culture and from time to time. Resources are spatially distributed varying in quantity and quality.

Why the resources are important?

Resources are necessary for citizenry because of the following reasons: Resources when used as a raw material satisfy the needs and comforts of human beings. Natural resources are a source of agricultural activities which adds to the economic importance. They also provide employment opportunities.

Learn more about resource :

brainly.com/question/24514288

#SPJ4

5 0
1 year ago
Other questions:
  • Match the characteristics to the blood vessels.
    13·1 answer
  • Describe how the human body shows the life characteristic of organization
    12·1 answer
  • The study of structures of the cardiovascular system is an example of
    8·1 answer
  • How are two fossil teeth similar and different
    9·2 answers
  • A blue whale has a length of 28,578 millimeters. What is the length of a blue whale in kilometers? Show your work below by writi
    7·2 answers
  • Please help me if you can right answers please
    12·2 answers
  • Why are models important ?
    9·1 answer
  • WHO WANTS TO BE MARED BRAINELEST
    13·2 answers
  • Science is painful I will give brainily to the correct answer :D
    8·2 answers
  • If I do sit-ups for 2 minutes, then my heart rate will speed up.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!