The statement that best describes he purpose of examining mammary secretions in mares before parturition is testing for elevated levels of calcium. 
<h3>What is the processes of parturition in mares?</h3>
In parturition, a fetus is fully developed, a process called Ferguson reflex occurs to stimulate contractions. The canal is lubricated by a fluid called allanotic fluid and facilitates the discharge of the amnion and the fetus. A virginal distension releases oxytocin and more contractions.
For a mare to be ready for parturition, elevated levels of calcium is tested from the mammary gland to confirm that the mare is healthy and ready for parturition.
Learn more on parturition here: brainly.com/question/14982881
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B 
Now lol I have an A+ in that class
        
                    
             
        
        
        
An invasive species because it isn't naturally from central park.
        
             
        
        
        
Answer:
 Pteridophytes are vascular plants but they do not produce flowers and seeds which mean their source of reproduction is unknown or hidden. 
On the contrary, Spermatophytes as the name indicates, are seed bearing plants. They produced seeds and flowers. Examples are flowering plants, cactus, leather flower, buttercup and may more.
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Answer:
They are transformed by the armies of the United States and China wants to defeat them