A Major Change in the Evolutionary Lineage Leading to the Chordates

question 103

Multiple Choice

A major change in the evolutionary lineage leading to the chordates was the

• A) evolution of the water vascular system.
• B) development of a dorsal hollow nerve cord.
• C) calcification of an internal skeleton.
• D) development of the lophophore as an adaptation to predatory life.
• E) ability to filter feed.

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Definitions:

Mega-Discount Chain

A large-scale retail store or series of stores offering significant discounts on a wide range of merchandise to attract a broad customer base.

Cluster Sampling

A sampling technique where the population is divided into clusters, and a sample of these clusters is then selected for analysis.

Education Researcher

An individual specializing in studying, evaluating, and improving educational systems, methods, policies, and outcomes.

Stratified Sampling

A sampling method that divides the population into smaller groups, or strata, to ensure representation of significant subpopulations in the sample.