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andriy [413]
3 years ago
14

When did Charles Darwin begin to formulate his concept of evolution by natural selection?

Biology
1 answer:
Nezavi [6.7K]3 years ago
4 0

during his vouage on the Bagual  

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Please help
Ludmilka [50]
A memory B cell is kinda of how it sounds it has a memory of what your body has fought before such as a virus and can stimulate a response quicker then the first time you encountered it. 

If you lack memory B cells your body doesn't built up the same immune response when you come into contact with the virus again.

"Vaccination would prevent further disease" Incorrect, a vaccine lets you build up memory cells to combat the disease if you lack them you cannot build up a defense.
"Vaccination would not prevent further disease" Correct, a vaccine can be a dead version of a virus or parts of a virus that shows your body what to respond to quickly in the future. If you body cannot make memory b cells it wouldn't help to use a vaccine. Your body wouldn't keep a memory of it being bad.
"You would not produce antibodies" Even if your body does not remember a particular virus it does produce antibodies to combat it just not as quick or efficiantly as something it has come into contact with before and produced memory cells.
"You would over produce histamine" Incorrect, different process for that histamine.
6 0
3 years ago
Internal threats are always accidental and stem from poor access controls. Only external attackers intentionally plan and carry
Troyanec [42]

Answer: false

Explanation: External threats are not intentional.

Companies face business risks every day, and those risks are part of every organisation which can be in form of

--- External threats (economic, social , political and Micro threats )are threats or risk that cannot be controlled by a company or predicted with a high level of reliability. Therefore, making it difficult to reduce the associated risks.

-And Internal threats are threats that happen inside the organisations which can be predicted with some reliability, and therefore, provide chances of reducing it.

They both can lead to lower revenue, profits, and financial loss.

4 0
3 years ago
How does PAMPs activate infectious Inflammation​
Juliette [100K]

Answer:

Activation of infectious inflammation:

PAMPs are derived from microorganisms and thus drive inflammation in response to infections. After identifying microorganisms infections PAMPs by PRRs, activate cytoplasmic complexes called inflammasomes.

After activation of inflammasomes, these inflammasomes activate the protease caspase-1, which then cleaves or breaks various pro-inflammatory cytokines, resulting in maturation and cellular release that cause inflammatory reactions.

3 0
3 years ago
Que son los ácidos nucleicos
devlian [24]

Answer:

a complex organic substance present in living cells, especially DNA or RNA, whose molecules consist of many nucleotides linked in a long chain.

Explanation:

5 0
3 years ago
5514998054 ps 123456​
yaroslaw [1]

tyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy

8 0
2 years ago
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