Consider Figure B4

question 19

Multiple Choice

Consider figure b4.2. In the text Analyze this figure and select which interpretation below is consistent with the findings.

• A) Several genes in fruit flies appear to have duplicated somewhere in their ancestral lineage
• B) Nematodes express a greater variety of Hox genes than cephalochordates
• C) Each organism contains at least one of each known Hox gene, though some contain duplicates
• D) Sea urchins are round; therefore they do not require as many Hox genes to direct development

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Definitions:

Blood-to-blood Contact

Direct exposure or transfer of blood from one person to another, often a pathway for transmitting infections.

Low-level Disinfectant

A disinfectant that kills some viruses and bacteria, but not spore-forming or non-enveloped viruses, used for surface disinfection.

Incineration

Burn, setting afire.