The trait that would be least useful in a phylogenetic analysis would be one that a) is detectable only in observations of early development. b) involves genetically inherited behaviors. c) is altered easily by small changes in diet. d) can be studied only in museum specimens. e) is heritable but is determined by many genes.

A trait that is altered easily by small changes in diet.

Explanation:

The phylogenetic tree explains the evolutionary relationship between the organisms. The phylogeny of the organisms will depend on the difference and similarities in their genetic or physical characters.

The traits that are used in phylogeny must be constant and present in the ancestors or in atleast a group. The trait that can be easily modified or changed cannot be used for the study of the evolutionary relationship. Hence, trait which is altered by diet cannot be used in phylogenetic analysis.

Thus, the correct answer is option (C).

a researcher conducts an experiment on the secretion of a particular hormone in mice. scientists inject mice with a substance that stimulates the production of the hormone. the scientists then test the levels of hormones produced by the mice. the tool used to measure the hormones consistently detects the levels at 10 points lower than the actual hormone levels in the mice. this tool makes measurements, but the measurements aren't .

explanation:

no u