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siniylev [52]
3 years ago
5

The immune system has both specific and nonspecific immune responses against pathogens. Which scenario describes a specific immu

ne response?
the body using intact skin to keep out all pathogens
o antibodies being produced to fight off a pathogen inside the body
macrophages engulfing an unknown virus that has entered the body
inflammation and redness occurring at the site of a bacterial infection
Biology
1 answer:
vovangra [49]3 years ago
3 0

Answer:

antibodies being produced to fight off a pathogen inside the body

Explanation:

Specific immune responses, also known as the adaptive immune system are ways the body fights against pathogens. The body is able to identify cells that are unique to it. When pathogens bearing an unknown identity enter the body, antibodies are released to attack the antigens on the surface of these pathogens.

The body usually develops this immunity after a previous attack by the pathogen. Lymphocytes known as the B and T cells are released by the immune system t engulf the pathogens.

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In which order will free nucleotides add on to a single strand of DNA with the sequence ATTGCA during DNA replication?
AnnZ [28]
The answer is T A A C G T.

Replication is a process in which DNA molecule is copied, and thereby two identical DNA molecules are produced.  Complementarity is achieved through interactions between nucleobases. In the DNA, base complements are adenine - thymine (A-T) and guanine - cytosine (G-C). 

So, free nucleotides will add in the following order <span>T A A C G T:
original strand                 new strand
     A                                       T
     T                                       A
     T                                       A
     G                                      C
     C                                      G
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3 years ago
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Explanation:

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5 0
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What is the mass of an element with 15 protons, 13 electrons, and 11 neutrons?
RSB [31]

Answer:

B. 26amu

Explanation:

The nucleus of an atom in an element contains protons, electrons and neutrons. The proton number equals the electron number in a neutral atom. The proton number is also called the atomic number, denoted by Z.

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Hence, A = Z + N

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In this question, N is 11 while Z is 15

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