Which of These, If True, Would Support the Claim That

question 63

Multiple Choice

Which of these, if true, would support the claim that the ancestral cnidarians had bilateral symmetry?
1) Cnidarian larvae possess anterior-posterior, left-right, and dorsal-ventral aspects.
2) Cnidarians have fewer Hox genes than bilaterians.
3) All extant cnidarians, including Nematostella, are diploblastic.
4) β-catenin turns out to be essential for gastrulation in all animals in which it occurs.
5) All cnidarians are acoelomate.

• A) 1 only
• B) 1 and 4
• C) 2 and 3
• D) 2 and 4
• E) 4 and 5

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Definitions:

Population Mean

The average value of all the items in a population.

Confidence Level

A measure of certainty or probability, expressed as a percentage, that a specified parameter lies within a specified interval in statistical analysis.

Sample Size

The number of observations or data points collected from a population for the purpose of statistical analysis.

Confidence Interval

A span of numbers, obtained from sampled data, that probably includes the value of an unseen population measure within a specified confidence level.