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
irina1246 [14]
3 years ago
15

In the past, an irregular heart rhythm was treated by using a drug to help regulate the beat. There is a treatment that can also

regulate heart rhythms that has replaced drugs in some cases. What is that treatment?
pacemaker
angioplasty
clot-dissolving drugs
myocardial infarction
Biology
1 answer:
scZoUnD [109]3 years ago
8 0

Answer:

I believe this is a pacemaker. It controls the heart when it starts to fail.

Explanation:

You might be interested in
100 points! PLEASE HELP! Answer all questions
kow [346]

Answer: I can only help you with one

4. D because you need data fro what ever your doing.

thats as much as i can help vote me the brainleirst

4 0
2 years ago
Part A - Modification of chromatin structure Which statements about the modification of chromatin structure in eukaryotes are tr
Salsk061 [2.6K]

Answer:

Some forms of chromatin modification can be passed on to future generation of cells

Acetylation of histone tails in chromatin allows access to DNA for transcription

DNA is not transcribed when packaged tightly in a condensed form

methylation of histone tails can promote condensation of the chromatin

Explanation:

chromatin modifications that can be passed on includes epigenetic modifications that are heritable changes made to the chromatin structure that does not involve the DNA sequences. Some epigenetic modifications include DNA methylation and Histone modifications. examples of histone modification include acetylation, methylation, phosphorylation, ubiquintylation etc. All these function either in allowing the DNA become more accessible to transcritional factors or vice versa. for exmple, histone tail acetylation encourages unwounding of nucleosomes allowing transcriptional factors to have access to the DNa while histone tails methylation further tightens the nucleosomes promoting condensation of the chromatin.

5 0
3 years ago
Which of the following would most likely result in the greatest decrease in the rate of a chemical reaction? (1 point)
erma4kov [3.2K]
The option which would most likely result in the greatest decrease in the rate of a chemical reaction is adding an enzyme inhibitor to a reaction catalyzed by an enzyme.
Enzyme inhibitor is known for slowing down any processes, especially when it comes to chemical reactions, so I'd say A is the correct answer.
6 0
3 years ago
Which of the following is a source of genetic variation in sexually-reproducing organisms?
Simora [160]
A mutation is one form of genetic variation.
7 0
3 years ago
Read 2 more answers
How are adaptations related to natural selection?<br><br> Need help:P
kvv77 [185]

Answer:

In evolutionary theory, adaptation is the biological mechanism by which organisms adjust to new environments or to changes in their current environment. The idea of natural selection is that traits that can be passed down allow organisms to adapt to the environment better than other organisms of the same species

6 0
2 years ago
Other questions:
  • Can someone help me with this?
    10·1 answer
  • Read the statement.
    9·1 answer
  • When you are on a first date, your hands begin to sweat, and you begin to feel nervous. What theory of emotion would say that th
    12·1 answer
  • The summer solstice is the longest day of the year because the Earth is tilted A) the most toward the Sun. B) the farthest from
    12·2 answers
  • What should scientists do after completing a scientific investigation?
    8·2 answers
  • In most stable freshwater environments, populations of Daphnia are almost entirely female and reproduce asexually. However, male
    9·1 answer
  • Explain how cells multiply and how they can differ in structure and function.
    11·1 answer
  • Describe how the body responds to different types of medicine.
    10·1 answer
  • a student is investigating cellular transport. what will most likely occur when the student places a cell that is 95% water insi
    14·1 answer
  • What letter represents a trench?<br> a. A<br> b. B<br> c. C<br> d. D<br> e. E
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!