Which of the following is an essential characteristic of an index fossil?
A) The organism lived in a very specific environment or two, such as tropical volcanic islands.
B) The organism lived for a very limited period of geologic time.
C) The fossils of the organism are exceptionally well preserved.
D) The organism lived on the land, not in the ocean.
Question 2
Using the known rates of radioactive decay to date the crystallization of certain minerals is known as ________ dating.
A) conventional
B) radiometric
C) relative
D) fossil assemblage
Diagram of a flagellate stramenopile cell, showing characteristic flagellar hairs.
Water striders serve as a model organism for the study of sexual conflict between males and females.
Modern Human Fossil Sites in the Old World
Effective communications skills are essential to the medical assistant’s career
Therapeutic index: (a) Drug X has a therapeutic index of 4. (b) Drug Z has a therapeutic index of 2.
Essential Oils and Notes