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
Marizza181 [45]
4 years ago
7

1. Key Concept List the

Biology
1 answer:
Ipatiy [6.2K]4 years ago
8 0
<h2>DNA </h2>

Explanation:    

1) Experiment done by Griffith:

  • Griffith used two related strains of bacteria, known as R and S
  • R bacteria were nonvirulent, meaning that they did not cause sickness when injected into a mouse whereas mice injected with live S bacteria developed pneumonia and died
  • Griffith tried injecting mice with heat-killed S bacteria (that is, S bacteria that had been heated to high temperatures, causing the cells to die), the heat-killed S bacteria did not cause disease in mice
  • When harmless R bacteria were combined with harmless heat-killed S bacteria and injected into a mouse, not only did the mouse developed disease and died, but when Griffith took a blood sample from the dead mouse, he found that it contained living S bacteria
  • Griffith concluded that the R-strain bacteria must have taken up what he called a transforming principle from the heat-killed S bacteria, which allowed them to transform into smooth-coated bacteria and become virulent

2) Experiment done by Avery:

  • Avery, McCarty and MacLeod set out to identify Griffith's transforming principle
  • They began with large cultures of heat-killed S cells and, through a long series of biochemical steps progressively purified the transforming principle by washing away, separating out, or enzymatically destroying the other cellular components
  • These results all pointed to DNA as the likely transforming principle but Avery was cautious in interpreting his results
  • He realized that it was still possible that some contaminating substance present in small amounts, not DNA, was the actual transforming principle

3) Experiment done by Hershey and Chase:

  • Hershey and Chase studied bacteriophage, or viruses that attack bacteria
  • The phages they used were simple particles composed of protein and DNA, with the outer structures made of protein and the inner core consisting of DNA
  • Hershey and Chase concluded that DNA, not protein, was injected into host cells and made up the genetic material of the phage

You might be interested in
When baby girls are born, all the eggs are already formed in the ovaries true or false<br> .
olga_2 [115]

it is true do y'all learn this I health or what?
6 0
3 years ago
Read 2 more answers
(Apoptosis is? ) A)cancerous cells
sasho [114]
Apoptosis is programmed cell death. The body is this to get rid of unneeded or abnormal. The body will get rid of cells with damaged DNA before they can become cancerous.
7 0
3 years ago
Read 2 more answers
Which correctly lists the three parts of soil that are classified by their particle size? bedrock, humus, and clay clay, bedrock
Alecsey [184]

Answer:

The correct option is;

Sand, clay, and silt

Explanation:

The categorization of soil particles by size can be made into three classes including sand (particle size between 0.05 mm to 2 mm), silt, (particle sizes between 0.002 mm to 0.05 mm) and clay (particle sizes lesser than 0.002 mm), larger particles such as stones, pebbles, boulders and rock other fragments are left out of the textural classification because of their inertness

The combination of the three particle sizes can be found in most soils and their relative proportion defines the texture of a given sample of soil.

4 0
3 years ago
Read 2 more answers
A plant experiences a mutation to its xylem tissue. The plant will no longer To transport
Ket [755]

Answer:

The plant will no longer be able to transport water and dissolved minerals from the roots to the rest of the plant

6 0
3 years ago
Please help now I need it. You need to develop a demonstration to show evidence of how cellular respiration and photosynthesis d
mamaluj [8]
I may not be able to make you a presentation, but I can help you on the idea behind it. Photosynthesis is 6 Carbon dioxide 6 water and light to make glucose and oxygen. With cellular respiration, its the opposite. Glucose + oxygen to break it down and forms waste products of 6 carbon dioxide and 6 water. The main thing it produces though is ATP (Adenosine Triphosphate). ATP is the product of cellular respiration and is fuel for your cells to function. I hope this helps. There are different stages in photosynthesis and cellular respiration that I’m not going to dive into, but this is the main reason why they depend on each other. Because unlike humans where we eat food, they use photosynthesis to make their glucose which they turn into ATP energy. Think I covered most of it. Good luck on your presentation!
7 0
3 years ago
Other questions:
  • Help To Check This Also
    7·1 answer
  • 1 point
    8·1 answer
  • Select the correct answer.
    11·1 answer
  • In humans, a recessive allele of a gene on the X chromosome causes humans to be "colorblind." A colorblind XY man and an XX woma
    9·1 answer
  • Which property of water makes it helpful to use in car radiators
    15·2 answers
  • Is the process of adding atoms to the center of a protostar or gravitational center in space.
    8·2 answers
  • Why is hypertension, or high blood pressure, a serious health risk?
    7·1 answer
  • Photorespiration
    9·1 answer
  • In eukaryotes, where do transcription regulators bind?
    8·1 answer
  • Which statement describes Newton's first law of motion?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!