What Accounts for the Diversity of Cell Types and Functions

question 64

Multiple Choice

What accounts for the diversity of cell types and functions in humans relative to simpler animals, despite not having significantly more genes than simpler animals?

• A)Complexity arises from different combinations of proteins.
• B)Complexity arises from differential gene expression.
• C)Humans gain more genes through horizontal gene transfer.
• D)Many human genes can encode multiple proteins.

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Definitions:

Acheulean Technology

A Stone Age technology characterized by distinctive oval and pear-shaped hand-axes, associated with early humans, particularly Homo erectus.

Genus Homo

The genus to which modern humans belong, characterized by higher mental faculties, upright posture, and bipedal locomotion.

Oldowan Tools

The earliest known stone tool industry, dating back to about 2.6 million years ago, associated with Homo habilis and used by early hominins for cutting, scraping, and processing animal and plant materials.

Homo Floresiensis

A species of small hominin that lived on the island of Flores, Indonesia, until about 50,000 years ago, known for its relatively small stature and brain size.