Why Are Cilia Described as an Example of Unity Underlying

question 12

Multiple Choice

Why are cilia described as an example of unity underlying the diversity of life?

• A)Cilia are cells that function in locomotion.
• B)Humans and Paramecium both share the same architecture of their cilia.
• C)Cilia have an elaborate system of tubules.
• D)Cilia provide motility to all the cells on which they reside.
• E)Imprints of cilia have been found in the fossilized remains of prokaryotes.

---

Definitions:

Gastrulation

A phase early in embryonic development during which the single-layered blastula reorganizes into a multilayered structure, forming the embryonic germ layers.

Blastulation

An early stage in embryonic development that results in the formation of a blastula, a sphere of cells surrounding a fluid-filled cavity.

Gray Crescent

An area that appears on the surface of amphibian eggs following fertilization, indicating where the dorsal side of the embryo will develop.

Cleavage

The series of cell divisions of a fertilized egg that leads to the formation of the embryo.