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
dimulka [17.4K]
3 years ago
5

______ are molecules that stimulate a response by t and b cells.

Biology
1 answer:
serg [7]3 years ago
6 0
Antigens; they are molecules that are foreign to the body, thus stimulating a response by the b- and t-cells that aim to defend the body against harmful and mostly foreign bacteria.
You might be interested in
Which is the DNA tehory? How do we know the DNA contains genetic information?
ValentinkaMS [17]

DNA is made up of molecules called nucleotides. Each nucleotide contains a phosphate group, a sugar group and a nitrogen base. The four types of nitrogen bases are adenine (A), thymine (T), guanine (G) and cytosine (C). The order of these bases is what determines DNA's instructions, or genetic code. Human DNA has around 3 billion bases, and more than 99 percent of those bases are the same in all people. DNA sequencing theory is the broad body of work that attempts to lay analytical foundations for determining the order of specific nucleotides in a sequence of DNA

6 0
2 years ago
Through _______ larger molecules are formed
HACTEHA [7]

Through Polymerization larger molecules are formed.

4 0
2 years ago
Read 2 more answers
Pls help. it’s not showing up on brainly pls
bulgar [2K]
The answer is A btw you don’t have to use that chart the best way to do or the easy way to do it by doing it on the amino acid wheel it’s much better and faster.
Let me know if you have any questions:)
6 0
3 years ago
What is the functional advantage of the alveolar walls being so thin?
Sati [7]
Alveolar walls are thin to enable the quick passage of oxygen in and out of the lungs. The lungs works hand-in-hand with the heart and also is responsible in converting blood that's de-oxygenated into an oxygenated blood that is usable by the organ systems of the body. The alveolar walls are also designed to have thin membranes so that it can expand and constrict quickly allowing us to breather properly.
4 0
3 years ago
What percentage of all living things that have ever existed on
Ratling [72]

D. 99% of all living things that have ever existed are now extinct

8 0
3 years ago
Read 2 more answers
Other questions:
  • What parts of the body are classified as connective tissue?
    6·1 answer
  • What features of development indicate that echinoderms and chordates are more closely related to each other than they are to oth
    13·2 answers
  • Describe how females can be carriers,but males cannot in terms of sex linked traits
    9·2 answers
  • There are two tomato plantlets. One of them is kept in an oxygen chamber with a light source and another is kept in sunlight. Bo
    11·2 answers
  • Which of the following best describes the principle of evolution by natural selection?
    13·1 answer
  • A small group of people with several colorblind individuals move from the mainland move to a previously uninhabited, secluded is
    13·1 answer
  • A book that weighs 20 N sits on a table. How big and in what direction does the force of gravity from the Earth act on the book?
    9·2 answers
  • Explain Excitation- Contraction Coupling. Briefly (2-3 sentences) describe each step involved in this process
    12·1 answer
  • Please help! Im not sure if it’s primary or secondary because there was ground flora at year 0.
    6·1 answer
  • Energy drinks tend to lack nutrients such as proteins, lipids, or carbohydrates, and instead contain ingredients that interact w
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!