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
lubasha [3.4K]
3 years ago
5

Which of the following statements are fundamental to the clonal-selection theory of how the adaptive immune system functions? I)

Each lymphocyte has a unique membrane receptor that recognizes one antigen. II) When the lymphocyte binds an antigen, it is activated and begins dividing to form many identical copies of itself. III) Cloned lymphocytes have slight differences and are selected by the spleen for removal if they do not bind an antigen. IV) Cloned cells descend from an activated lymphocyte and persist even after the pathogen is eliminated.
Biology
1 answer:
soldier1979 [14.2K]3 years ago
3 0

Which of the following statements are fundamental to the clonal-selection theory of how the adaptive immune system functions? I) Each lymphocyte has a unique membrane receptor that recognizes one antigen. II) When the lymphocyte binds an antigen, it is activated and begins dividing to form many identical copies of itself. III) Cloned lymphocytes have slight differences and are selected by the spleen for removal if they do not bind an antigen. IV) Cloned cells descend from an activated lymphocyte and persist even after the pathogen is eliminated.

A. only I and III

B. only II and IV

C. only I, II, and IV

D. only II, III, and IV

Answer:

C. only I, II, and IV

Explanation:

Lymphocytes have specific membrane receptors. These receptors serve as binding sites for specific antigens. Binding of the antigen to these surface receptors triggers the propagation of lymphocytes which in turn form effector cells and the memory cells.  

For example, the activated B lymphocytes divide into plasma cells and memory cells. The plasma cells divide and form a group of antibodies all of which have receptors for the antigen recognized by the parent B lymphocyte. The memory cells live in the body and begin the immune response when the same antigen ever enters. T lymphocytes also divide and form effector cells (active helper T cells and cytotoxic cells) and memory T cells.

You might be interested in
Green in calour
Oksana_A [137]

Answer:

хз подивись в перекладачі

3 0
3 years ago
Along with plants and algae, in which organisms can photosynthesis occur?
adell [148]
<span>Apart from the plants and algae which are well-known to be able to perform photosynthesis, other organisms capable of doing so are some specific species of bacteria especially those which contain the green pigments called chlorophyll necessary for photosynthesis. These bacteria are also capable of absorbing carbon dioxide.</span><span />
3 0
3 years ago
Read 2 more answers
PRUEBA DE QUÍMICA
vampirchik [111]

Answer:  Creo que es B

Explanation:

P.S(eso fue muy difícil. Lo siento mucho si se equivoca.)

5 0
3 years ago
A 2 column by 3 row table. Column 1 is titled Planet A with the following entries: Atmosphere is mostly carbon dioxide, Surface
goldenfox [79]

Answer:

Planet A: Mars

Planet B: Earth

<em>Explanation</em>:

I got it right on Edge 2020, your welcome :)

3 0
3 years ago
Read 2 more answers
Olivia says global warming can't be real because a blizzard in her town last winter lasted four days. How would you explain to O
BartSMP [9]

Answer:B.) Global warming causes air to be moister, resulting in more frequent blizzards.

Explanation:

3 0
3 years ago
Other questions:
  • A _____ is a tiny space between the axon of one neuron and the dendrites or cell body of another neuron. glial cell reticular fo
    7·1 answer
  • What is a cell made of?
    7·1 answer
  • What are three self-defeating behaviors and three life-affirming behaviors you learned about yourself through the stress self-as
    6·1 answer
  • MARKING BRAINLIEST!
    15·1 answer
  • Nucleic acid monomers are ______ and are made up of _______
    10·2 answers
  • Which is NOT an energy source obtained from the ocean?
    6·2 answers
  • Guys pls help...who are the energy forms in biology pls a have an project​
    14·1 answer
  • Help on bio test........
    11·1 answer
  • Male cones produce ______ which contains cells that develop into sperm.
    10·2 answers
  • You see a dog with completely black fur. what can you say about fur color genetics in this dog?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!