Answer:
The answer is D.
Explanation:
When metal react with non-metal, it will form an ionic bonding.
(Correct me if I am wrong)
 
        
             
        
        
        
Answer:The characteristics of red blood cells is that they are usually concave in shape, and usually have a fair bit of surface area on them. Immature red blood cells like reticulocytes are more squashed like. The function of red blood cells is to carry oxygen, and/or carbon dioxide to various portions of the body.
Explanation:
 
        
             
        
        
        
Answer:
Correct Answer: D. Answers A and C.
Explanation:
The other guy on this question was incorrect, i failed that question so here is the anwser.
 
        
             
        
        
        
Heart rate or pulse I think.
        
             
        
        
        
Answer:
The correct answer is - neurulation
Explanation:
The neural groove is a groove of the neural plate which is a thick plate that is enclosed by the neural folds of an embryo. The neural grove forms the neural tube which expands and develops into the spinal cord and brain.
The development of the neural grove is taken place during the process known as neurulation which is characterized by all characteristic development related to the neural groove and ventricular system.