Mitochondria and chloroplasts are two types of

How does the molecular clock work? a. it analyzes the brain functionality of two different species.b. it examines and compares the physical characteristics of two different species.c. it illustrates relationships between two different species.d. it compares the number of mutations that exist in the dna of two different species.

Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation

What is the difference between a meteoroid and a meteor?