Question

to better understand the burrowing habits of alpheus bellulus (the tiger pistol shrimp), some studies have used resin casting to obtain precise measurements of the shrimps’ burrows. resin casting involves completely filling an empty burrow with a liquid plastic that hardens to create a three - dimensional model; however, recovering the model inevitably requires destroying the burrow. in their 2022 study, miyu umehara and colleagues discovered that an x - ray computed tomography (ct) scanner can accurately record a burrow’s measurements both at a moment in time and throughout the entire burrow - building process, something that’s impossible with resin casting because ______
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which choice most logically completes the text?
a it can only be used on burrows below a certain size.
b it does not allow for multiple castings of the same burrow over time.
c the casting process takes more time than a. bellulus takes to construct a burrow.
d the process of recovering the model distorts the resin’s shape.

Explanation:

The text compares resin casting and X - ray CT scanning for studying tiger pistol shrimp burrows. Resin casting destroys the burrow when the model is recovered. The CT scanner can record measurements at a moment and throughout the burrow - building process. We need to find why resin casting can't do this. Option A is about burrow size, which is not related to the time - based measurement ability. Option C is about the time of the casting process vs. burrow construction time, not about multiple measurements over time. Option D is about distorting the resin's shape, but the key issue is about measuring over the burrow - building process. Option B says resin casting doesn't allow multiple castings of the same burrow over time. Since resin casting destroys the burrow, you can't cast the same burrow multiple times as the burrow is destroyed after the first casting. This explains why it can't record throughout the burrow - building process like CT can.

Answer:

B. it does not allow for multiple castings of the same burrow over time.