<span>Constructing recombinant DNA or rDNA scientists
should combine both DNA from two different species.  Based on study, rDNA
is possible if both DNA that should be combined should have the same chemical </span><span>structure.
Most o the DNA do have the same structure they only differ in nucleotide
sequence. </span>
 
        
             
        
        
        
Answer:
Other deposits may be from fossilized bone or bird droppings called guano. Weathering and erosion of rocks gradually releases phosphorus as phosphate ions which are soluble in water. Much of the phosphate eventually is washed into the water from erosion and leaching.
Explanation:
 
        
             
        
        
        
Mouth, pharynx, esophagus
        
                    
             
        
        
        
 
In asexual reproduction, reproductive organs aren't used but they're used.
 
advantage of sexual- A lot of genetic variation. since they have DNA of two parents. they can survive more and adapt more.
disadvantage of asexual- diversity is limited. Since the organism only gets the DNA of one parent, they wouldn't be able to really survive if something happened.They would easily be extinct.
Sorry I can't really cone up with better words but I hope you get the idea. it all comes down to natural selection really if you've learned about it. Hope it helped!!!
 
        
             
        
        
        
Tracheotomy refers to creating an opening in the neck in order to place a tube into a person's windpipe.