''The plasma membrane allows some molecular species to enter and excludes others. It is therefore referred to as a SEMIPERMEABLE MEMBRAINE.''
Answer:
A. Endocrine
Explanation:
The endocrine system is a collection of glands that produce the hormones that regulate metabolism, growth and development, tissue function, sexual function, reproduction, sleep, and mood, among all the other things
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I believe a woman can be described pregnant after about 13 weeks or so, because this is when the unpleasant effects of pregnancy start to lessen, and the mother starts to get used to the hormonal changes.
I hope you found this helpful! :)
The unique property of an echinoderm within higher invertebrates is their radial symmetry. These echinoderms include the famous starfish, sea urchin, sand dollars, sea cucumbers, and sea lilies. They are found at the ocean depth, form the intertidal zone to the abyssal zone.