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
kogti [31]
2 years ago
15

Scientifically, describe the shape of a DNA molecule.

Biology
1 answer:
galben [10]2 years ago
8 0
The double helix is a description of the molecular shape of a double-stranded DNA molecule. In 1953, Francis Crick and James Watson first described the molecular structure of DNA, which they called a "double helix," in the journal Nature.
You might be interested in
There are hundreds of different restriction enzymes that each cut ______ at a different palindrome sequence.
Sphinxa [80]

Answer:

DNA

Explanation:

<h2>What is DNA?</h2>

DNA is a self-replicating material that is present in nearly all living organisms as the main constituent of chromosomes. It is the carrier of genetic information.

4 0
2 years ago
Jon likes hiking. He observes that whenever he hikes up a hill he breathes heavier than when he is on flat ground. Which 2 state
Alekssandra [29.7K]

Answer:

-Sensors in the brain detect a lack of oxygen.

-The muscles in his body need more energy and therefore more oxygen.

Explanation:

-Sensors in the brain detect a lack of oxygen.

-The muscles in his body need more energy and therefore more oxygen.

-The body has too little carbon dioxide to maintain function.

-The body is using carbon dioxide instead of oxygen to make energy.

-Blood pressure has decreased, so less blood is being pumped to the muscles.

<em>The correct answer would be that </em><em>sensors in the brain detect a lack of oxygen</em><em> and t</em><em>he muscles in the body of Jon need more energy and therefore, more oxygen.</em>

At sea level, the atmospheric pressure easily allow oxygen to permeate the cells of the lung and diffuse into the blood. At high altitudes, air pressure is generally lower and permeation/diffusion through the cells of the lung into the blood becomes difficult.

<u>Without adequate oxygen, the body cannot generate energy needed for physical activities of muscles. Consequently, the sensors in the brain detect a lack of oxygen and the body system reacts by breathing heavily to compensate for the oxygen shortage.</u>

6 0
3 years ago
Substance that accelerates any chemicl reaction but is not consumed in the action
DerKrebs [107]
The answer is enzyme.
6 0
3 years ago
The picture below shows the relationship between organisms that live in a valley.
vova2212 [387]

Answer:B

Explanation: Since there’s more snakes they’ll outweigh the rats and end up eating them until they’re gone unless the snake population decreases

7 0
2 years ago
Describe Lamarck’s idea about how organisms evolved. Use the giraffe’s neck as an example.
Murljashka [212]

Answer

Lamarckism, a theory of evolution based on the principle that physical changes in organisms during their lifetime—such as greater development of an organ or a part through increased use—could be transmitted to their offspring.

Lamarck believed that the stretching elongated the giraffe's neck, which became a useful characteristic and was passed onto future generations. This resulted in the length of the giraffe's neck increasing over time. It is now commonly accepted that Lamarck's ideas were wrong.

8 0
3 years ago
Other questions:
  • If hardy-weinberg conditions exist, what will happen to the frequency of a dominant allele over time? the frequency will increas
    9·2 answers
  • An individual who is blood type AB negative has what antigens
    12·1 answer
  • Describe some of the problems faced by benthic organisms in the ocean
    10·2 answers
  • azman disuruh oleh cikgu untuk memanaskan alkohol didalam sebuah tabung didih . apakah langkah langkah yang perlu diambil semasa
    7·1 answer
  • Which describes a difference between light waves and sound waves
    6·2 answers
  • What are the pros of Natural Vegetation?
    7·1 answer
  • Capillaries reach every ___ in the body
    10·2 answers
  • The simplest level of organization and basic unit of life is the ___________.
    12·2 answers
  • Which of the following examples shows that a chemical reaction has occurred?
    5·2 answers
  • Which activity is ideal for fast-twitch muscles? A. Running B. Weightlifting C. Biking D. Hiking.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!