Answer:
Answer is D. 1,2 & 3.
Explanation:
Note that,
* The generic name of a drug is very important because, it will show the chemical name name of the drug when it was first discovered, this will describe the molecular and atomic structure of the drug.
*The contraindication explains the specific situations when a drug should not be used because it may be harmful to the user.
*The user dose shows the quantity of a drug which must be used at a particular point in time.
These three things must be provided before a drug can be approved by the US food and drug administration.
can define the product/objective.
Answer:
PLants are the most important, as the chain of energy starts there, and everything else depends on them.
This energy most directly results from the life activity of respiration.
The hummingbirds have very high energy expenditure (have the highest oxygen requirements of all vertebrae) with a fast heart rate, very fast wing beats and sustained hovering. So the hummingbird is nearly always on the edge of starvation, needing to take in more nectar than its body weight each day.
The respiratory system of these birds is highly adapted for the high oxygen needs. So, the muscles of the hummingbird cause pressure changes within the air sacs. As a result, more oxygen can enter the respiratory system. Also, they have the highest density of red blood cells which allows them to rise heart beat to around 500 breaths per minute during flight.
