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
ki77a [65]
3 years ago
10

What best describes the role of cell-to-cell communication during a response to an invasion of antigens?

Biology
1 answer:
Svetllana [295]3 years ago
8 0

Answer:

Chemicals that are secreted from antigen-presenting cells then activate helper T cells.

Explanation:

You might be interested in
Mark the region of the ocean that represents the open ocean.
valkas [14]

Answer:

The pelagic zone refers to open and free waters in the body of the ocean that stretch between the ocean surface and the ocean bottom and are not too close to some boundary, like a shore or the seafloor or the surface.

Explanation:

5 0
3 years ago
1. En una actividad pedagógica, Luis organiza una dinámica con los estudiantes de Química: para ello quien menos utilice y respo
11111nata11111 [884]

Respuesta:

d. Ninguno tiene la razón

Explicación:

Para convertir masa a moles, necesitamos la masa molar de cada sustancia.

Fernando (58.85 g Fe)

La masa molar de Fe es 55.85 g/mol.

58.85 g × 1 mol/55.85 g = 1.054 mol

Jacqueline (23.05 g Na)

La masa molar de Na es 22.99 g/mol.

23.05 g × 1 mol/22.99 g = 1.003 mol

Carlos (35.45 g Cl)

La masa molar de Cl es 35.45 g/mol.

35.45 g × 1 mol/35.45 g = 1.000 mol

Paola (27.0 g Al)

La masa molar de Al es 26.98 g/mol.

27.0 g × 1 mol/26.98 g = 1.00 mol

4 0
3 years ago
Why are antibiotics unhelpful for treating the common cold?
olganol [36]

B. Antibiotics attack only bacteria.

6 0
3 years ago
Arrange the events in the correct order to describe how the magnetic field forms around Earth.
horsena [70]
The correct sequence of events is : C,D,B,A.
Iron rich magma in the earth's core heats up because of radiation and the pressure exerted by the other layers of the earth. This heat in the crust trigger convection currents in the mantle. The magma closest to the core will be hotter and therefore less dense than other layers. Being less dense the layer will rise towards the crust, eventually becoming cooler and sinking back down in a circular motion.
The continued circular motion creates electric currents which then generates the magnetic field.
6 0
4 years ago
What is the center of our solar system
Firlakuza [10]

the center of the solar system is the sun

7 0
4 years ago
Other questions:
  • Is the pattern on a butterfly's wing unique to each?
    8·1 answer
  • The shape of the DNA molecule is called a double ________ . The backbone of DNA is made of ______ molecules and phosphate molecu
    14·2 answers
  • Can anyone pls help?!
    12·1 answer
  • Why does ionic bonding result in the formation of charges while covalent bonding does not? Thank you :)
    7·1 answer
  • What is the purpose of ATP in cells?
    15·1 answer
  • The central nervous system includes
    5·2 answers
  • What is Metabolism? In a simple answer.
    9·2 answers
  • Which of the following lists accurately represents the increasing complexity of genetic materials?
    10·1 answer
  • Sulfur pollution in the atmosphere produces acidic rain. Much like the chlorine in a pool, acid rains kill organisms and turn la
    12·1 answer
  • Below are the reduction half reactions for chemolithoautotrophic denitrification, where hydrogen is a source of electrons and en
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!