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
Readme [11.4K]
3 years ago
12

Foreign cells that enter our body have unique cell surface proteins, known as ________, which stimulate our body's defense to at

tack.
Biology
2 answers:
Ugo [173]3 years ago
8 0
Foreign cells that enter our body have unique cell surface proteins, known as antigens, which stimulate our body's defence to attack.
Hope this helps
erma4kov [3.2K]3 years ago
7 0

Answer:

The answer will be antigens

You might be interested in
What scalar quantity do you need to determine the rate of motion?
Sunny_sXe [5.5K]

Answer:

A vector quantity has a direction and a magnitude, while a scalar has only a magnitude. You can tell if a quantity is a vector by whether or not it has a direction associated with it.

Explanation:

Example: Speed is a scalar quantity, but velocity is a vector that specifies both a direction as well as a magnitude.

4 0
3 years ago
The mass of an atom is contained primarily in its _____. A. Electron Shell B. Nucleus C. Proton D. Size
igor_vitrenko [27]
The mass of an atom is contained primarily in its NUCLEUS.
An atom is made up of three sub particles, which are proton, neutrons and electrons. The proton and the neutrons are located in the nucleus of the atom while the electron  are located outside the nucleus where they move about in continuous motion around the nucleus. The proton and the neutrons, which are located in the nucleus have the same relative mass of 1, which has been estimated to be about 2,000 times bigger than that of the electron, which has a relative mass of 0.0005. This shows that, the mass of an atom is located primarily in its nucleus. <span />
6 0
3 years ago
Read 2 more answers
How do enzymes affect chemical reactions and activation energy?
lara [203]
Enzymes (Catalysts) lower the required activation energy, allowing the reaction to happen more quickly. 
3 0
3 years ago
In the absence of oxygen, the pyruvic acid produced during
erma4kov [3.2K]

Answer:

B. Ethanol

Explanation:

During absence of O2 pyruvic acid is reduced to ethanol in alcoholic fermentation.

7 0
2 years ago
Read 2 more answers
Which is true of all crops that humans grow
igomit [66]
They are descended from wild plants.
8 0
3 years ago
Read 2 more answers
Other questions:
  • What makes a heterogeneous mixture different from a homogeneous mixture?
    8·2 answers
  • What is the name of the stage that precedes both mitosis and meiosis?
    12·1 answer
  • What are the main digestive enzymes secreted by the pancreas? (Anatomy and Physiology)​
    15·1 answer
  • Which statement does not explain the concept of the Doppler effect ?
    7·2 answers
  • the average hair skin and nails have a pH level of five generally falling between 4.5 and 6 true or false
    14·1 answer
  • Which of the following describes an event that results from mitosis?
    5·1 answer
  • The area of soil in which the pores are totally filled with water is called the ____________________ zone.
    7·2 answers
  • Under which condition, with or without human interference, did your pack do better? Why do you think that?
    12·1 answer
  • 17. A place where two tectonic plates collide is called a ______ boundary and is often associated with _____ faults. ​
    11·1 answer
  • During aerobic respiration, NADH delivers electrons to ______, and then ______ captures electrons at the end and joins with hydr
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!