D because to help preserve environment everyone has to work together
The statements which are true about half-life are given below:
- A radioactive element's half-life stays the same when its temperature changes.
- A radioactive element's half-life stays the same when the pressure upon it changes.
Thus, the correct options are B and F.
<h3>What is Half-life?</h3>
The half-life of any radioactive element may be defined as the time taken for the radioactivity of a specified isotope to drop to half of its original value.
The above statement is true about the half-life of any radioactive element because the half-life of any substance does not depend on pressure, temperature, and concentration.
Therefore, it is well described above.
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I think it's B. one who has many personality traits
Kilo-1,000
deci-1/10
centi-1/100
milli-1/1000
During the primary response we display a latent period of no secretory antibody synthesis.
<h3>What is latent period?</h3>
The term latent period refers to the time lag that exists between the time that an individual contacts a pathogen and when the person begins to have the capacity to infect others with the disease.
The latent period varies from one organism to another. For some organisms, the latency period is as long as six months or higher. During this period the infected person shows no sign of infection.
During this period, we display a primary response to the antigen of no secretory antibody synthesis.
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Missing parts;
During which response to the antigen do we display a latent period of no secretory antibody synthesis? A. primary. B. secondary. C. tertiary. D. quaternary.
