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Lady_Fox [76]
1 year ago
15

When there is a cut in the skin and bacteria enter the body, the immune system responds. First, macrophages approach the area of

the cut. Next, the macrophages surround any bacterial cells and engulf them. What feature of the immune system is best described by this scenario?
A.
self-recognition, which is a part of adaptive immunity
B.
the phagocytotic barrier, which is a part of innate immunity
C.
antigen specificity, which is a part of adaptive immunity
D.
the inflammatory barrier, which is a part of innate immunity
Biology
1 answer:
Lelechka [254]1 year ago
6 0

The feature of the immune system which is best described by this scenario which involves engulfing of bacterial cells is the phagocytotic barrier, which is a part of innate immunity and is denoted as option B.

<h3>What is Immune system?</h3>

This is part of the body which is responsible for protection and helps to fight germs and diseases through the white blood cells which are present in the body system.

The immune system comprises of macrophages which engulfs the pathogen through the process known as phagocytosis which is why phagocytotic barrier which is a part of innate immunity was chosen as the correct choice.

Read more about Immune system here brainly.com/question/6612564

#SPJ1

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Nuclear power plants create _____ pollution.
EleoNora [17]

The correct answer is option C

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The Nuclear power plant creates radioactivity and thermal pollution.

The water used in the nuclear power plants is very warm and causes thermal pollution as it is released into water bodies.

The nuclear power plant uses radioactive substances like uranium and the waste that is left is radioactive waste.

3 0
3 years ago
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15. What is atherosclerosis?
Stolb23 [73]

Atherosclerosis refers to the build-up of fats and cholesterol in the walls of blood vessels (Option A).

<h3>What is atherosclerosis?</h3>

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8 0
2 years ago
Which of the following correctly lists the kingdoms of life scientists currently use
Greeley [361]
Kingdoms are Archaebacteria, Eubacteria, Protista, Fungi, Plantae, and Animalia.

I'm not sure if these 6 kingdoms I listed are one of the"which of the following"options you asked for so I hope it helps.
3 0
3 years ago
The amino acids of a growing polypeptide chain are held together by what kind of bond during the elongation stage of translation
kifflom [539]

Answer: Peptide bond

Explanation: A peptide bond is the covalent chemical bond  bond that holds together two amino acids which occurs when the carboxylic group of one molecule reacts with the amino group of the other molecule, linking the two molecules and releasing a water molecule catalyzed by peptidyl transferase, an RNA-based enzyme  integrated into the growing chain.

In the elongation stage ie when Long chain polypeptides are forming , peptide bonds  are formed by linking many amino acids to each other. These peptide bonds of amino acids are  relatively unstable, and  can break spontaneously in a slow process as can be seen especially  in enzymes of living organisms in the making and breaking of bonds.

4 0
3 years ago
1.
SSSSS [86.1K]
1-The correct answers is C- evolutionary classification.
Evolutionary classification/taxonomy is a branch of biological classification. The objective is to classify organisms and group them based on their shared descent, progenitor-descendant relationship and degree of evolutionary change. Now this classification can be done by comparing DNA sequences of the organisms and seeing how many they have in common

2- The correct answer is A-cladistic analysis.
A cladistic analysis is focused on categorizing the organisms based on their derived characters. And what is that? that means they are getting categorized
according to their evolutionary relationships( from ancestral characters).
So, species are going to be classified according to how recent their common ancestor is. If two species have a more recent ancestor they will end up in the same group
If the common ancestor between them is far, the distance between the respective taxa will be bigger.

3- The correct answers is C.
A derived character is a characteristic that appeared throughout evolution, still remains in a lot of different taxonomic groups and allows us to identify those groups.
From the options given, C is the only correct one because the presence of hair (a derived character)  only exists in mammals( the group). Other animals don't share that trait.


4-The answer is A.
In each node, a taxon was only one but then was divided into two taxa. Therefore, each node will represent a common ancestor of the taxon.
The correct option is A because the last node or terminal node is the hypothetical last common ancestor of the taxon on the cladogram.

5-  The correct answer is A.-DNA can solve evolutionary puzzles.
Dna has been helping understand how an organism is similar to more than one species, and that way, we can classify the organism the best way possible.
This can be achieved by comparing the nucleotides of the organism we want to classify, with other species. There are databases that have all the DNA sequenced so, what's left to do is count the common nucleotides and their positions.
3 0
3 years ago
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