Many of the Organ Systems Observed in Vertebrates Are Present

question 9

Multiple Choice

Many of the organ systems observed in vertebrates are present in the annelids,the simplest coelomates; an exception is the ________,which helps explain why earthworms leave the soil on rainy days.

• A) digestive system
• B) circulatory system
• C) respiratory system
• D) excretory system

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Definitions:

Nurture

The processes external to an organism that nourish it as it develops according to its genetic code or that cause it to swerve from its genetically programmed course. Environmental factors that influence development.

Genes

Fundamental units of heredity that are responsible for guiding the process of creating proteins that, in turn, play critical roles in body functions and development.

Infancy

The period in a child's life from birth to 12 months, a time of rapid growth and development.

Childhood

The period of life from birth to adolescence, characterized by growth, learning, and play.