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
myrzilka [38]
3 years ago
9

Which of these is NOT one of the structures considered to be the immune system's first line of defense?

Biology
1 answer:
Romashka-Z-Leto [24]3 years ago
6 0

The B cells are not considered as first line defense structures of the immune’s system

Answer: Option C

<u>Explanation:</u>

Our body is protected internally by nature by many layers of defense. Any microbe or a foreign material that disturbs the body is defended by these barriers.

The first layer of defense required physical and chemical barrier such as the skin, mucous membrane, tears, saliva etc . The second line defense system involves the cells and the tissues that protect the body.

You might be interested in
We presume that meiosis evolved later than mitosis. What process would not have to evolve in cells undergoing meiosis in order t
Anna71 [15]

Answer:

Acid reflex -- Tupid cell rules

Explanation:

Acid reflex. Cells never use this ability until well into the stone ages. Acidic cells need to transfer their proteins before mitosis, so acid reflex is a paradox when everything is following Tupid cell rules.

4 0
2 years ago
During expiration, the volume of the thorax __________ as the diaphragm __________
tino4ka555 [31]
<span>Answer:During expiration, the volume of the thorax decreases as the diaphragm rises/relaxes.

In expiration the air gets out of the lungs and it's not occupying as much space in the lungs, so the volume of the thorax will decrease. Meanwhile, the diaphragm can go to his relaxed stage and move </span><span><span>superiorly</span>
</span>
4 0
3 years ago
If you were planting a vegetable garden, what should you consider for the time of planting? Use at least three examples of what
skelet666 [1.2K]
Carrots because they is no space to planting chops
3 0
3 years ago
Which of these is an example of land degradation?
Nikitich [7]

The correct answer is - D. A drought kills all the plants in an area, leaving bare land.

If there's such a big drought that will manage to kill off all the vegetation in an area and leave bare land behind it, than the land will be degraded in no time. Once the land is left without its natural protection that the roots of the vegetation provide, the land will be exposed to high rates of and erosion. The erosion will be very quick and the top layers of the soil will be moved away with every wind and rainfall that will appear. That will degrade the land to a very high degree, making it totally unusable and it will need lot of time to eventually recuperate.

6 0
3 years ago
Read 2 more answers
Of the answers below, what is the smallest nucleotide sequence that could code for a protein with 300 amino acids?
ololo11 [35]
The nucleotide sequence would have to have 900 nucleotides in order to code for a protein of 300 amino acids. When translating RNA into proteins, RNA is read 3 bases at a time. Each group of 3 bases is a codon, and each codon codes for an amino acid. When read, the proper amino acid is added to a growing chain of amino acids, which will be folded to become a protein.

Therefore, 300 amino acids * 3 nucleotides per amino acid = 900 nucleotides.
6 0
3 years ago
Other questions:
  • Misting increase water loss from plant leaves while roots are forming.<br><br> TRUE<br><br> FALSE
    15·1 answer
  • What is the name of a process that produces use to make their own food
    5·2 answers
  • YALL HELP ME PLEASE
    10·2 answers
  • How many cells are produced in Mitosis
    15·2 answers
  • Why is reducing caloric intake insufficient for a person to loose weight in a healthy way?
    12·2 answers
  • When double stranded dna is “cleaved” or cut. there are two ways that the cut might be repaired what are the two ways?
    14·1 answer
  • Which of the following involves pathogens or an invading viruses or bacteria
    12·2 answers
  • If 60 seconds are in a minute, 60 minutes in an hour, and 24 hours in a day, then 86,400 seconds are in a day. What type of reas
    11·2 answers
  • Calculate the diploid &amp; haploid numbers for each of the following organisms
    6·1 answer
  • 2. Which pair consists of terms that represent equivalent units of information? *
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!