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Len [333]
3 years ago
14

Which type of rock was the first to exist on the planet?

Biology
1 answer:
timurjin [86]3 years ago
4 0

Answer:

B- sedimentary

Explanation:

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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
How can pesticide use be harmful to human agriculture?
ivanzaharov [21]
Pesticide use can be very harmful beacause too much of them can cause the crops to go bad, and kill bees which help spread pollen and enhance the crops. 
4 0
3 years ago
Read 2 more answers
Please explain using the diagram
mrs_skeptik [129]

Answer:

cells make up tissues, which make up organs. organs make up organ systems which make up organisms

Explanation:

4 0
3 years ago
Both nitrogen and carbon are building blocks for life because they are needed in ____?
meriva
D) All of the above
That's why we're called Carbon-Based Lifeforms
8 0
3 years ago
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What is the main term used to locate COPD in the alphabetic index
vaieri [72.5K]

Answer:

Chronic obstructive pulmonary disease

Explanation:

I'm not 100%  sure of what you're asking here but the main term for COPD is Chronic obstructive pulmonary disease. COPD is a long-term lung disease, which makes breathing especially difficult. I hope this helps:)

7 0
3 years ago
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