THE MOST LIKELY MODE OF AN ORGANISM THAT POSSESSES ATTACHMENT STRUCTURE, THIN OUTER SURFACE LAYER AND ABSENCE OF AN ELABORATE DIGESTIVE TRACT IS

• A. Autotrophic
• B. holophytic
• C. parasitic ✓
• D. saprophytic
• E. symbiotic

The answer to the question is: C. parasitic

An organism that possesses attachment structures, a thin outer surface layer, and the absence of an elaborate digestive tract is most likely to be a parasitic organism. Parasites are organisms that live in or on another organism (the host) and benefit at the expense of the host. They typically have specialized structures for attachment to the host, such as hooks, suckers, or adhesive organs. The thin outer surface layer helps in nutrient absorption from the host, as parasites rely on the host for their nutrition and do not have a complex digestive system. The absence of an elaborate digestive tract is also characteristic of parasitic organisms, as they directly absorb nutrients from the host’s body.