Answer:
<em>Sperm is the only thing that can combine with a egg to create a living breathing organism </em>
Explanation:
 
        
             
        
        
        
Answer:
The growth factor receptors have a kinase domain while the Cytokines receptors do not contain a kinase domain as part of their structure.
Explanation:
The two are signaling molecules that control cell activities in some manners, such paracrine, endocrine and autocrine manners.
The receptor kinase domain can be specific for substrate sites in which phosphorylation occurs.
 
        
             
        
        
        
Answer:
Intervertebral foramen
Explanation:
These structures are found in between pairs of vertebrae  and not only do spinal nerves pass through them, the spinal artery, veins, and transforaminal ligaments do too. While the spinal cord passes through the vertebral foramen, the spinal nerves exit and enter the spine through these intervertebral foramen to 'serve' the rest of the body. 
 
        
             
        
        
        
Answer: 
a. Through the leaves
Explanation:
the plant absorb carbon dioxide through their leaves.
 
        
             
        
        
        
Pros is that it helps water stay in one place and it also makes water more easily accessed for future use. The cons is animals can have less space to live and the overflow of water can occur which means flooding.