Garstang's Auricularia hypothesis suggests that ancestral vertebrates may have evolved from urochordate larvae.
What is Garstang's Auricularia?
The auricularia hypothesis, proposed by Garstang was an attempt to explain how the chordate body plan originated from a deuterostome common ancestor by emphasizing the significance of changes in larval forms. According to the Garstang Hypothesis, development of sexual maturity in a non-metamorphosing lineage of tunicates might provide the immediate proto-chordate ancestors of more typical chordates.
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The answer is D.They reproduce independently. It is false because they need a host and can't survive by themselves.
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A: no
In barium examinations, you want to see if something it's obstructing, like the colon. You only use a front view.
B: yes
When you want to see if everything it's alright about the spine, you need to analyze the curvature, and for that, you need front and side view.
And, is the only radiographic tool that can be done in antero-posterior and lateral views.
C: no
When you are looking for trauma or bone breakage, you may need only a side view or front view.
D: yes
If you are looking for any trauma or emergency, you need different positions of the bone to discover any breakage.