The Following Questions Refer to the Description Below

question 16

Multiple Choice

The following questions refer to the description below.
While on an intersession course in tropical ecology, Kris pulls a large, snakelike organism from a burrow (the class was granted a collecting permit) . The 1-m-long organism has smooth skin, which appears to be segmented. It has two tiny eyes that are hard to see because they seem to be covered by skin. Kris brings it back to the lab at the field station, where it is a source of puzzlement to the class. Kris says that it is a giant oligochaete worm; Shaun suggests it is a legless amphibian; Kelly proposes it belongs to a snake species that is purely fossorial (lives in a burrow) .
-Most dinosaurs and pterosaurs become extinct at the close of the __________ era.

• A)Cretaceous
• B)Permian
• C)Devonian
• D)Ordovician
• E)Triassic

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Definitions:

Hemostat

A type of forceps.

Contamination

The presence of an unwanted substance or microorganism in a material, environment, or product, posing risk or harm.

Forceps

A hand-held, hinged instrument used in medical procedures for grasping and holding objects.