An Ectothermic Organism That Has Few or No Options When

question 13

Multiple Choice

An ectothermic organism that has few or no options when it comes to its behavioral ability to adjust its body temperature is a

• A)terrestrial lizard.
• B)sea star, a marine invertebrate.
• C)bluefin tuna, a predatory fish.
• D)hummingbird.
• E)honeybee in a hive.

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Definitions:

Nuclear Equivalence

The principle suggesting that all somatic cells of an organism have the same genetic material and therefore, in theory, have the potential to develop into any type of cell or even a whole organism.

Differential Gene Expression

The process by which genes are turned on or off in different cell types, allowing for cellular diversity and function.

Teratogen

Any agent capable of interfering with normal morphogenesis in an embryo, thereby causing malformations; examples include radiation, certain chemicals, and certain infectious agents.

Morphogenesis

The biological process that causes an organism to develop its shape and structure.