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Sophie [7]
3 years ago
7

James wants to know which brand of shoe will help him run faster. He thinks the more expensive shoe should be the one that helps

him run faster. He tries three different types of running shoes. He runs one lap on the track with pair of shoes ( shoe A) and times how long it takes. He rests for 15 minutes. Then, he tries on another of shoes (shoe B) and runs a lap around the track, while timing how long it takes. He rests for 15 minutes before repeating the lap with the last brand of shoes (shoe C).
Which type of investigation did he complete ?
a.)experimental
b.)descriptive
c.)observational
Biology
1 answer:
Finger [1]3 years ago
8 0

Answer:

C.) Experimental

Explanation:

He conducts test to see which shoe helps him better, in so doing a experimental investigation

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Increased Serum Interleukin-2 Levels Are Associated with Abnormal Peripheral Blood Natural Killer Cell Levels in Patients with A
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In rheumatoid Arthritis patients, NK cell levels were abnormally elevated, possibly due to high serum levels of IL-2.

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The given study is to investigate the relationship between serum interleukin-2 (IL-2) levels and disease activity.

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Learn more about Rheumatoid arthritis on

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Explanation:

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All of the other entities listed above are part of your adaptive immune system. The adaptive immune system is antigen-dependent and requires activation. This section of your immune system responds differently to different pathogens, and has the bonus of having immunologic memory, the ability to remember pathogens after infection and respond much quicker upon secondary and tertiary encounters.

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