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
bearhunter [10]
3 years ago
14

The purpose of the ______ system is to prevent foreign substances from entering the body and to attack foreign substances that a

re in the body.
A. immune
B. endocrine
C. nervous
D. excretory
Biology
2 answers:
earnstyle [38]3 years ago
7 0

Answer:

Immune

Explanation: The immune system is the body's defense against infectious organisms and other invaders. Through a series of steps called the immune response, the immune system attacks organisms and substances that invade body systems and cause disease. The immune system is made up of a network of cells, tissues, and organs that work together to protect the body.

kaheart [24]3 years ago
3 0
A. Immune because this is what the immune systems job is
You might be interested in
What happens to the air that a emperor penguin breathes in?
enot [183]
Emperor penguins need lungs to breathe. In penguin lungs, air never stops. ... Once the air goes farther into the trachea it splits into two different directions into both lungs. To get the oxygen into the blood cells, it must come "within small distance of the penguin blood cells".
6 0
3 years ago
The economist thomas malthus suggested that
Anika [276]

Answer:B there were soon be insufficient food for the growing human populatio

6 0
3 years ago
Which of the following is nicknamed the "powerhouse" of the cell
Oduvanchick [21]

Answer:Mitochondria

Explanation:Mitochondria is the powe house of a cell

3 0
3 years ago
Some autoimmune diseases show a positive correlation with dramatically decreased expression of histone deacetylase (HDAC9, an en
soldier1979 [14.2K]

Answer:

The positive charge of the histone proteins get reduced due to the process of histone acetylation, thus making the wrapping of DNA around the histones less tightened. The loose connected DNA afterward associates with the transcription factors for the articulation of the genes situated in that area.  

Generally, when there is no requirement of gene anymore, the acetyl groups from the histones get withdrawn by the activity of histone deacetylase enzyme (HDAC9) that makes the DNA tightly wrapped and inaccessible again. In case, when less expression of histone deacetylase enzyme occurs, the process of deacetylation fails to take place. This indicates that within an immune cell, at the time of infection, the inflammatory gene, which was made available does not get re-wrapped firmly around the histones.  

6 0
3 years ago
50 points!!! Which examples describe how a plant might meet the challenge of getting and using energy? Choose all answers that a
spayn [35]

The answers are A and D

Hope this Helps,pleeeeeeeeease vote as brainliest!!!

6 0
3 years ago
Read 2 more answers
Other questions:
  • Inadequate carbohydrate intake results in the breakdown of body protein for use as fuel. true or false
    6·1 answer
  • Communication and transportation have improved as a result of scientific advancements
    14·2 answers
  • Why are crickets primary consumers
    13·1 answer
  • The belief that genotype expression depends on environmental experience and how we respond to the environment depends on the gen
    7·1 answer
  • 6. How did the disappearance of dinosaurs help the spread of early mammals?
    9·2 answers
  • Bile salts break up _____ into small droplets
    12·1 answer
  • Can you determine where each sample was from? use what you know about relative salinity and its global variation. label the samp
    10·1 answer
  • As a result of the absence of plants in the meadow,the rabbit population will probably
    14·1 answer
  • Explain two ways in which changes on the earth’s surface are connected to changes below the earth’s surface. Support your answer
    13·1 answer
  • ________ infection is of greatest concern to pregnant women and those with a compromised immune system.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!