Use the Information to Answer the Question

question 36

Multiple Choice

Use the information to answer the question.
Trichoplax adhaerens is the only living species in the phylum Placozoa. Individuals are about 1 mm wide and only 27 µm high, are irregularly shaped, and consist of a total of about 2,000 cells, which are diploid (2n = 12) . There are four types of cells, none of which are nerve or muscle cells, and none of which have cell walls. Individual animals move using cilia, and any "edge" can lead. T. adhaerens feeds on marine microbes, mostly unicellular green algae, by crawling atop the algae and trapping it between its ventral surface and the substrate. Enzymes are then secreted onto the algae, and the resulting nutrients are absorbed. T. adhaerens sperm cells have never been observed, nor have embryos past the 64-cell (blastula) stage.
Which of the following T. adhaerens traits is different from all other known animals?

• A) T. adhaerens is multicellular.
• B) T. adhaerens lacks muscle and nerve cells.
• C) T. adhaerens has cilia.
• D) T. adhaerens lacks cell walls.

Evaluate the outcomes of specific reactions providing the major organic product of ether synthesis processes.

Discuss the characteristics and reactivity of ethers within the context of organic chemistry.

Apply knowledge of organic synthesis and analysis to predict products of reactions involving ether formation.

Understand the specific absorption patterns of ethers in IR (Infrared) spectroscopy and their implications for structural analysis.

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Definitions:

Psychoanalytic

Relating to the theory of psychology that emphasizes unconscious motivations and conflicts in explaining human behavior.

Posttraumatic Stress Disorder

A psychiatric state initiated by involvement in or observation of an alarming situation, featuring persistent flashbacks, nightmares, and heightened anxiety.

Flashbacks

Intense, vivid recollections of a past experience, often traumatic, that momentarily feels as if it is happening in the present.

Nightmares

Disturbing dreams that cause fear or anxiety, often waking the sleeper and can be related to stress or psychological issues.