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
14

Helps activate T cells, which are produced in bone marrow but mature in the thymus gland HELLPP

Biology
1 answer:
love history [14]3 years ago
3 0

Answer:

peptide antigens by MHC class II molecules

Explanation:

Helper T cells are activated by peptide antigens by MHC class II molecules. These antigens express on the surface of antigen-presenting cells (APCs). After activation, the T helper cells divide and secrete cytokines  to assist the immune response.

You might be interested in
You don't need to answer the questions in brackets but please answer the ones that don't.
seropon [69]

Answer:

please as in we should not

7 0
3 years ago
When two species compete for the same ecological niche, they cannot coexist because they are competing for the exact same resour
zalisa [80]
The correct answer is B. competitive exclusion.
This law refers to the fact that it is nearly impossible for two species to exist in the same place at the same time together, if they are interested in the same resources. If both species need the same thing to survive, one will have to be stronger while the other one will dwindle in number. 
5 0
3 years ago
Which explanation provides support for continental drift theory?
Luba_88 [7]

Answer and explanation:

Among the main evidences of the theory of continental drift, we can mention the fit of the lines of the coasts of several continents, In addition to the similarity between several relief structures and rocks in different continents (such as mountain ranges found in South America and on the east coast of Africa).

There are also records of fossils of identical extinct plants, found on the African continent and also in countries like Australia, India and Brazil, for example.

Identical reptile fossils have also been found in Africa and South America, in addition to several correlations in the distribution of aquatic dinosaur fossils that lived in common areas of the ancient supercontinent.

5 0
3 years ago
Which cell structure are sometimes found attached to the endoplasmic reticulum
ale4655 [162]

Ribosomes. Ribosomes which synthesize proteins are found in the rough endoplasmic reticulum.

5 0
3 years ago
Read 2 more answers
Match the term with the definition
abruzzese [7]
Binomial nomenclature this is the scientific naming of organisms staring with then genus and then species name
4 0
3 years ago
Other questions:
  • Alexander Fleming discovered a type of that kills bacteria, which led to the development of Penicillin.
    13·2 answers
  • What is Chromatid?<br> what is genome?
    5·2 answers
  • he island of Madagascar is located just off the SE coast of Africa, in the Indian Ocean. Scientists find species on this island
    13·1 answer
  • An element is defined by its number of what?
    5·2 answers
  • Drag each tile to the correct box.
    9·1 answer
  • A. Is the suspect guilty of the crime? B. How do you know?
    11·1 answer
  • One cat carries heterozygous, long-haired traits (Ss), and its mate carries homozygous short-haired traits (ss). Use a Punnett s
    14·1 answer
  • Considering the impacts and benefits of applying environmental biotechnology to clean polluted water systems, which of the follo
    9·2 answers
  • Which of the following statements best defines the term operon?
    5·1 answer
  • How does the structure of xylem relate to its function
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!