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makkiz [27]
3 years ago
12

What is herd immunity, and why are vaccines important for achieving herd immunity?

Biology
1 answer:
kap26 [50]3 years ago
8 0

Answer:

Herd immunity is a form of indirect protection from infectious disease that can occur with some diseases when a sufficient percentage of a population has become immune to an infection, whether through vaccination or previous infections, thereby reducing the likelihood of infection for individuals who lack immunity.

Explanation:

Vaccines create immunity without causing illness or resulting complications. Herd immunity makes it possible to protect the population from a disease, including those who can't be vaccinated, such as newborns or those who have compromised immune systems.

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Suppose that a zygote had only one copy of chromosome 21. Do you think that this zygote would develop into a normal embryo and c
Pie

Answer:

el niño tendría síndrome de downEl síndrome de Down es causado por un error aleatorio en la división de las células que tiene como resultado la presencia de una copia extra del cromosoma 21.

7 0
3 years ago
Is the gene for being a super taster autosomal or sex-linked? Explain your answer based on the pedigree chart.
ElenaW [278]

It is autosomal. However I'm unsure what you would do to explain.


5 0
3 years ago
3. Sponge structural support is provided by spicules and
Margarita [4]

Carbon is listed twice my dude :)

8 0
3 years ago
HIV can remain latent for several years and not cause any symptoms in its host. What viral reproduction cycle is occurring durin
lakkis [162]

Answer:

The lytic cycle.

Explanation:

<u>HIV is a retrovirus</u> that has a special enzyme called transcriptase reverse, which can synthesize DNA using RNA as a template. This replication system is particularly useful for the virus because the DNA synthesized from the RNA viral genome can be then integrated into the human chromosomes and stay inactive for years. This is called a lysogenic cycle and is characterized by a latency of the virus and an integration to the host DNA.

When there is a triggering event, <u>this latent virus can be excised from the human chromosome and start producing copies of itself using the host machinery.</u> <u>Then the virions are assembled and after that they lyse the host cell and release new infective units that can then infect neighboring cells. </u>This is called the lytic cycle of the virus and is the reproduction cycle that occurs when a person moves into the acquired immunodeficiency syndrome (AIDS) stage of HIV infection.

6 0
3 years ago
Which element would you expect to have a full valence shell?
kipiarov [429]

Answer;

-Noble gases or Group 18 elements

Explanation;

A full valence shell is the most stable electron configuration. Group 18 elements or noble gases such as helium, neon, and argon, have a full outer, or valence, shell. Elements in other groups have partially-filled valence shells and gain or lose electrons to achieve a stable electron configuration.

They are extremely unreactive and do not form bonds with themselves. Solid helium is the the ultimate fine powder being monotomic.

3 0
3 years ago
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