The different sizes of animals are related to the amount of food available in these environments.
<h3>How does altitude influence species richness?</h3>
The study in mountains with increasing altitude and increased species richness at heights of evidenced, followed by a reduction in richness with increasing altitude.
With this information, we can conclude that the different size of the lizards is explained by the amount of food available in the place where it is inserted.
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The phase in the cardiac cycle when the mitral valve is closed and the aortic valve is open is the systolic ejection phase (Option D). It is the second phase of the ventricular systole.
The cardiac cycle is a sequence of contraction and relaxation of the atria and ventricles to pump blood throughout the body.
This cycle (cardiac cycle) can be divided into two major periods: diastole and systole.
The diastole is when the heart relaxes and refills with blood, while the systole is when the heart contracts and pumps blood.
The systolic ejection phase is the second phase of the ventricular systole where blood is pumped from the ventricle.
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Answer:
They are called covalent bonds. 
Explanation:
I just went through the lesson.
 
        
                    
             
        
        
        
Answer:
Rectus Femoris
Explanation:
It has an action of extending the knee from a seated position.
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