According to Fossil Evidence, How Far Back in Time Did

question 26

Multiple Choice

According to fossil evidence, how far back in time did life on Earth exist?

• A)about 2.0 billion years
• B)about 65 million years
• C)about 545 million years
• D)about 3.5 billion years or more

---

Definitions:

Language Delays

A developmental disorder where a child's language acquisition is significantly slower than what is typically expected for their age, affecting communication.

Concordance Rates

The probability that two individuals with shared genetics (especially twins) will both have a particular trait or disease.

Biological Cause

Underlying physiological reasons for a condition or behavior, often related to genetics or bodily functions.

Behavior Modification

Techniques and principles based on behaviorism used to change or improve undesirable behaviors through reinforcement and consequences.