Era is used to mark the boundaries of geological time scale by using radio carbon dating technique.
Explanation:
Geological time starts with Precambrian time.
Geologically, time is divided between the Precambrian era and present time into era.
The three eras are Paleozoic era, Triassic period and Cenozoic era.
Era is further divided into periods.
Scientists use radio carbon dating to study fossils and rock formation. With this study they were able to divide them in exact geological scale.
Geologic scale is the record of events in earth's history and evolution.
The two adjectives that BEST describe Gary’s friends are untrustworthy and envious (Options D and E). In this history, his friends are misusing Gary's motor scooter.
<h3>The Reed scooter</h3>
The Reed scooter is a history in which Gary's friends are misusing his beautiful motor scooter.
In this history (the Reed scooter) Gary learns the mechanical issues and drivetrain of a motor scooter.
Gary’s friends can be considered untrustworthy (they are not able to be relied on as truthful) and envious (they show feelings of envy).
Learn more about the term untrustworthy here:
brainly.com/question/25578076
Answer: The answer is B
Explanation: Because it does not describe changes due to selective breeding.
Answer: The main function of mitochondria is to produce energy for the cell. Cells use a special molecule for energy called ATP.
Explanation: The most prominent roles of mitochondria are to produce the energy currency of the cell, ATP (i.e., phosphorylation of ADP), through respiration, and to regulate cellular metabolism. The central set of reactions involved in ATP production are collectively known as the citric acid cycle, or the Krebs cycle.