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
Elanso [62]
3 years ago
9

What is the mechanism that allows species to change over time?

Biology
2 answers:
In-s [12.5K]3 years ago
5 0

Natural selection is a mechanism that drives evolutionary change. Simply put, it is the survival of traits that are favorable to an organism within its environment. Think of it in terms of the example above with the mice.

ella [17]3 years ago
3 0

Answer:

evolution

Explanation:

You might be interested in
During a viral attack, which of the following is NOT the function of the host organism? A. To become a factory of viral producti
storchak [24]
The answer is B because viruses don't need to be fed.
5 0
3 years ago
Compare the normal allele for hemoglobin with the sickle cell allele. How does this difference affect the person’s red blood cel
Readme [11.4K]

Answer:

Sickle cell anemia is an inherited condition in which there aren't enough healthy red blood cells to carry oxygen through an individual's body. The red blood cells of a healthy individual are flexible and round, and they move through blood vessels with no problem, transporting oxygen successfully. However, a person with sickle cell anemia has rigid, sticky red blood shaped like sickles or crescent moons. These cells often get stuck in small blood vessels, which can slow or block blood flow and oxygen delivery to different parts of the body.

The sickle cell anemia trait is found on a recessive allele of the hemoglobin gene, while the regular red blood cell trait is found on the dominant allele. This means that a person must have two copies of the recessive allele (one from their mother and the other from their father) to be born with this condition. People who have one dominant and one recessive allele or both dominant alleles will have healthy red blood cells.

3 0
2 years ago
Which of the following are important features for transcription?
devlian [24]

Answer:

The correct answer will be option-A and B.

Explanation:

Transcription is a process which synthesizes a complementary molecule of DNA which acts a messenger called RNA.

The gene contains a sequence of the nucleotide at the beginning of gene called promoter sequence. The promoter sequence has the ability to attach an RNA synthesizing enzyme called RNA polymerase.

The RNA polymerase is the enzyme which synthesizes the RNA molecules using a single strand of DNA called template strand.  RNA polymerase binds nucleotide at 3' end of the strand thus proceeding the strand in 5' to 3' direction.  

The promoter and RNA polymerase begins the process of transcription and thus option-A and B is the correct answer.

6 0
3 years ago
What finding should prompt further diagnostic testing in a child presenting with diarrhea? a. Blood and mucus in the stools b. G
DIA [1.3K]

Answer: a. Blood and mucus in the stools.

Explanation:

Diarrhea is a gastrointestinal problem. It is associated with the symptoms of loose stools, cramps, vomiting, fatigue, and stomach pain. The diarrhea usually last for few days to week. It is also associated with the signs of dehydration due to loss of fluid through loose stools like stretchiness in skin, loss of color of skin, and fast heart rate. The diagnostics of diarrhea can be done by examining the blood and mucus in the stool.  

7 0
2 years ago
In fish or flaxseed the best source of omega3 fatty acids? Why?
Katena32 [7]
Fish because it is full of healthy oils. But depends on the kind of fish. I know salmon is rich in omega 3 fa
3 0
3 years ago
Other questions:
  • What patterns can be used to identify the ancestry line of an organism
    9·1 answer
  • Hemoglobin is an example of a protein with hemoglobin is an example of a protein with primarily a β-pleated sheet structure. a g
    7·1 answer
  • Which of these is a description of the relation?
    7·1 answer
  • Please help me!
    6·2 answers
  • Explain what happens to tissues, such as the heart, or the brain, if oxygenated blood is not delivered in a timely manner.
    5·1 answer
  • 3
    10·2 answers
  • Molecules can cross cell membranes from areas of low concentration to areas of high concentration by binding with carrier protei
    8·1 answer
  • Duplicate this (dna)<br><br> aau cgg aua cgc uaa ggc uau
    14·1 answer
  • Which claim best supports the identification of the products of the reaction?
    5·1 answer
  • Organic Analysis Discussion
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!