A stalked, sessile marine organism has several feathery feeding structures surrounding an opening through which food enters. The organism could potentially be a cnidarian, a lophophorate, a tube-dwelling worm, a crustacean, or an echinoderm. Which of the following traits, if found in this organism, would allow the greatest certainty of identification?
A) the presence of what seems to be radial symmetry
B) a hard covering made partly of calcium carbonate
C) a digestive system with mouth and anus separate from each other
D) a water vascular system
E) a nervous system
Heliotropium (marine heliotrope) lower leaf surface, showing trichomes and a few stomata
Treating the breast-feeding mother
Syn 3.0 Organism
Oxytocin and breast-feeding.
Sagittal section of eye and its accessory structures