Animals with the First Rudimentary Brains Probably Evolved About _________

question 49

Multiple Choice

 Animals with the first rudimentary brains probably evolved about _________ years ago.

• A) 4.5 billion
• B) 3.5 billion
• C) 700 million
• D) 250 million

---

Definitions:

Conditional

Relating to a statement or proposition that expresses a condition, typically formulated as "if...then..."

Body Fat

The portion of the human body made up of fat tissues, which serves as a source of energy, insulation, and protection.

Air Temperature

The measure of the warmth or coldness of the air in the environment, typically recorded in degrees Celsius or Fahrenheit.

Vernix Caseosa

A waxy or cheese-like white substance found coating the skin of newborns that provides protection while in the womb.