Hagfishes Are Differentiated from Lampreys and All Other Fishes in That

question 56

Multiple Choice

Hagfishes are differentiated from lampreys and all other fishes in that:

• A) hagfishes do not have gills.
• B) hagfishes lack a jaw.
• C) hagfishes are parasitic.
• D) hagfishes lack vertebrae.
• E) hagfishes have notochords.

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Definitions:

Matched Pairs

A study design where subjects are paired based on certain criteria, with one member of each pair receiving the treatment and the other serving as a control.

Ordinal Data

Data that is categorized based on order or ranking, but where the intervals between the categories are not necessarily consistent or known.

Normally Distributed

Describing a distribution that follows a normal curve, with most observations clustering around the mean and tapering off symmetrically towards the extremes.

Sign Test

A non-parametric test used to evaluate the difference between the median of a paired sample and a hypothesized value.