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Novosadov [1.4K]
3 years ago
14

How does energy flow through organisms in an ecosystem

Biology
1 answer:
nlexa [21]3 years ago
6 0
C from the sun to bird to worm
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A(n) _________ scan uses radioactive markers in the blood to monitor blood flow and metabolic activity via x-ray.
olya-2409 [2.1K]

Answer;

-PET scan

A PET scan uses radioactive markers in the blood to monitor blood flow and metabolic activity via x-ray

Explanation;

-A positron emission tomography (PET) scan is an imaging test that helps reveal how the tissues and organs are functioning. A PET scan uses a radioactive drug (tracer) to show this activity. This scan can sometimes detect disease before it shows up on other imaging tests.

-A PET scan is used to diagnose certain health conditions, to plan treatment, to find out how an existing condition is developing, and to see how effective a treatment is.

-In a PET scan, a machine detects radiation that is emitted by a radiotracer. A radiotracer consists of radioactive material that is tagged to a natural chemical, such as glucose.

7 0
3 years ago
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A graph of coal reserves in the United States versus time slopes downward. This indicates that coal production could have ______
rjkz [21]
The correct answer is:  [B]:  "decreased" .
________________________________________________________
<u>Note</u>:
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        In a graph of "coal reserves in the United States" vs. "time" ; 

→ the "time" is the "independent variable" that belongs on the "x-axis" .

→ The quantity or amount of "coal reserves in the United States" is the "dependent variable" that belongs on the "y-axis" . 

       If the graph "slopes downward" ;  this would indicate a "decrease" in the amount/quantity of "coal reserves" over "time" .  

→  As the value of "x" increases — "time" increases — and; as "x" increases, the value of "y" {the amount/quantity of "coal reserves"} decreases.  

→ This would be represented by a "downward sloping" graph;  

→  and, among the answer choices given, could indicate that coal production:
_______________________________________________________
                     →  "decreased" ;    
_______________________________________________________
→  which is:  Answer choice:  [B]:  "decreased" .
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7 0
3 years ago
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The __________ is the first segment of the small intestine.
BlackZzzverrR [31]
The<span> duodenum is the first segment of the small intestine</span>
8 0
3 years ago
The first organism to move into an area after primary disturbance are
allochka39001 [22]

Answer: I'd say C

Explanation: Small plants are at the bottom of the ecosystem, which means they have to start it out. I'm not sure tho.

3 0
3 years ago
With global warming and climate change affecting the world’s environment, how long will it be before humans have nowhere left to
scoundrel [369]

Answer:

humanity has a 95% probability of being extinct in 7,800,000 years

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