Sexual means something physical and sexual reproduction is the creation of an offspring.
        
                    
             
        
        
        
The answer to your question is B- introduction of non-native animal species 
        
                    
             
        
        
        
The two main clades branch from the most recent ancestor is called <span>Cnidaria and Bilateria. Please have in mind that Cnidaria is a phylum containing 10.000 species of animals. Now on the other hand, Bilateria is a major group of animals. After looing at the figure 33.2 we can conclude that these two are part of the ancestor of the eumetazoans which is a clade comprising all major animals. </span>
        
             
        
        
        
Answer: A would be the correct answer. Making observations would include scientists exploring the world around them
Explanation:
 
        
             
        
        
        
Answer:
Hydrogen bonds tend to be weaker than covalent or ionic bonds. The hydrogen bond formed between water molecules has a dissociation energy of 0.24 eV. A hydrogen bond has is approximately 90% ionic and 10% covalent. Van der Waals bonds are weak bonds with a dissociation energy of about 0.01 eV.
Explanation: