a. cause inflammation
b. make your mucous membranes watery
c. produce antibodies
d. eat dead cells
2) Why do doctors recommend that people get a new flu shot every year?
a. the flu virus becomes immune to the vaccine
b. the vaccine wears out over time
c. your body eliminates the vaccine
d. the flu virus changes every year
3) Antibodies do which of the following?
a. attach to cells with corresponding antigen
b. engulf and destroy pathogens
c. produce antigens
d. produce immature cells that become B cells
I keep getting a D, so if you could kind of explain it to me as well, that will be great.
B cells produce antibodies (option C), whereas doctors recommend that people get a new flu shot every year because the flu virus changes every year (Option D).
Mutation refers to any type of alteration of the genetic material (DNA) in the genome of an organism or virus.
In conclusion, B cells produce antibodies (option C), whereas doctors recommend that people get a new flu shot every year because the flu virus changes every year (Option D).
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B. The male urethra serves both the urinary and reproductive systems but at different times.
C. The male urethra is longer than the female urethra.
D. The male urethra is a passageway for both urine and semen.
Scientific consensus supports the idea that living organisms require oxygen. Then, a scientist discovers a type of bacteria that metabolizes sulfur instead of oxygen, and thus survives in environments without oxygen. The scientist concludes that a diverse group of many different organisms could live in an oxygen-free environment.
The reason why some scientist should be skeptical of the scientist’s results and conclusion is to evaluate experimental procedures and it also helps scientists recognize when ideas are not supported by evidence. This is the way that this theory can become a scientific consensus.
I hope it helps, Regards.
Question: The blades of a windmill turn on an axis that is 40 feet from the ground. The blades are 15 feet long and complete 3 rotations every minute. Write a sine model, y = asin(bt) + k, for the height (in feet) of the end of one blade as a function of time t (in seconds). Assume the blade is pointing to the right when t = 0 and that the windmill turns counterclockwise at a constant rate.
Answer:
a is the length of the blade.
The vertical shift, k, is the height of the windmill.
a = 15
k = 40
The period is 20 seconds.
b = pi/10
Third option (C)
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