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

Question

Quizplus · Accepted Answer

Caenorhabditis elegans is composed of about 1,000 cells, and the developmental origin of each cell has been mapped. This makes it an important model organism for developmental biology research.

Answer: B
 Caenorhabditis elegans has five pairs of chromosomes, but each pair is linked together, resulting in only a single chromosome. The entire genome has been sequenced.

Answer: D
 Caenorhabditis elegans is one of the few animals that naturally undergo programmed cell death during development, allowing researchers to study the genetic and molecular basis of apoptosis.

The Nematode Caenorhabditis Elegans ________