The Nematode Caenorhabditis Elegans ________

question 32

Multiple Choice

The nematode Caenorhabditis elegans ________.

• A) is composed of about 1,000 cells, in which the developmental origin of each cell has been mapped
• B) has only a single chromosome, which has been fully sequenced
• C) has about 1,000 genes, each of which has been fully sequenced
• D) uniquely, among animals, utilizes programmed cell death during normal development

---

Definitions:

Nervous System

The complex network of nerve cells (neurons) and fibers that transmits nerve impulses between parts of the body, enabling communication and coordination between different body parts.

Endocrine System

A network of glands in the body that produce, store, and release hormones into the bloodstream to control many of the body’s functions, including growth, metabolism, and mood.

Serotonin

A neurotransmitter that plays a crucial role in mood regulation as well as in sleep, appetite, and digestion.

Subcortical Structures

Components of the brain located below the cerebral cortex, involved in various functions including emotion, pleasure, and hormone production.