What Is True of the Cambrian Explosion

question 39

Multiple Choice

What is true of the Cambrian explosion?

• A) There are no fossils in geological strata that are older than the Cambrian explosion.
• B) Only the fossils of microorganisms are found in geological strata older than the Cambrian explosion.
• C) The Cambrian explosion is evidence for the instantaneous creation of life on Earth.
• D) The Cambrian explosion marks the appearance of filter-feeding animals in the fossil record.
• E) Recent evidence supports the contention that the Cambrian explosion may not have been as "explosive" as was once thought.

---

Definitions:

Exponential Random Variable

A type of random variable that describes the time between events in a Poisson process, representing occurrences that happen at a constant rate.

Exponentially Distributed

Describes the time between events in a Poisson point process, i.e., a process in which events occur continuously and independently at a constant average rate.

Random Variable

This refers to a variable where its values are linked to the outputs of unpredictable phenomena.

Exponentially Distributed

Refers to a probability distribution used to model the time between events in a Poisson process, characterized by a constant mean rate.