While on an intersession course in tropical ecology, Kris pulls a large, snakeli
ID: 10498 • Letter: W
Question
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).Which characteristic should permit the class to conclude that it is probably not a snake?
A) the number of eyes
B) its presence in a burrow
C) the absence of scales on its surface
D) the size and condition of its eyes
E) its length
Which is characteristic of all mammals, and only of mammals?
A) using the rib cage to assist in ventilating the lungs
B) a four-chambered heart that prevents mixing of oxygenated and deoxygenated blood
C) giving birth to live young (viviparous)
D) having glands to produce nourishing mild for offspring
E) parental care of offspring
Explanation / Answer
Which characteristic should permit the class to conclude that it is probably not a snake?
A) the number of eyes
B) its presence in a burrow
C) the absence of scales on its surface
D) the size and condition of its eyes
E) its length
snakes are characterised by eyes are small and covered by nictitiating membrane, lives in burrows etc..,
Which is characteristic of all mammals, and only of mammals?
A) using the rib cage to assist in ventilating the lungs
B) a four-chambered heart that prevents mixing of oxygenated and deoxygenated blood
C) giving birth to live young (viviparous)
D) having glands to produce nourishing mild for offspring
E) parental care of offspring
parental care , rib cage ,viviparous features are found in other phylum like repetilia, amphibia and aves (birds, forgs )
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