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.
The scientists who provided this hypothesis had an idea that the species evolved in order to accommodate their needs on certain islands. For instance, an example is beak size of certain birds which Darwin thought that this was to eat certain foods.
If it's a permeable membrane then it will allow certain molecules in. If it's impermeable then it won't allow molecules in. Therefore it is the deciding feature of whether something can go into the membrane.
The worm feeds via a "pumping" action in which it first uptakes the fluid surrounding it. Then, it expels the fluid while trapping any bacteria within it. The bacteria are then digested for energy and nutrients.
