Answer:
An ecologist must consider both of the speciation and extinction of an organism or when analyzing the diversity the life on earth because of the following reasons;
-          It is a role of an ecologist
-          It is part of their job
-          This will tell the existence of the organism
-          The organism’s life span on earth
-          How it was existed and were extinct
Explanation:
 
        
             
        
        
        
The hindbrain consists of the medulla, the pons, and the cerebellum.
<h3>The hindbrain</h3>
The hindbrain is the portion of the brain that is otherwise known as the rhombencephalon. It is the part of the brain that is located towards the lower back.
The hindbrain consists of 3 main parts:
- The medulla oblongata
- The pons
- The cerebellum
Each component has specific functions they perform. The medulla oblongata is located at the extreme end where the brain connects with the spinal cord. It controls activities such as heartbeat, blood pressure, and respiration. 
The pons of the hindbrain work hand in hand with the medullar oblongata for effective breathing. In addition, it is the part of the brain that controls the circadian rhythm of the body.
The cerebellum helps the body to maintain postural balance and adjustments when necessary.
More on the hindbrain can be found here: brainly.com/question/5427915
#SPJ1
 
        
             
        
        
        
Answer:Acids and bases In the human body, both blood and the cytosol (watery goo) inside of cells have pH values close to neutral. ... A base, in contrast, raises pH by providing hydroxide (OH −start superscript, minus, end superscript) or another ion or molecule that scoops up hydrogen ions and removes them from solution.
Explanation:
 
        
             
        
        
        
A. chemical precipitation of minerals from seawater
        
             
        
        
        
A. All are true except for A because there is a certain pattern to all polymers