Suppose you are testing how the number of battries affects bulb brightness. what heads would you use on this data table?

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.

When plants use sunlight to make food, the energy of sunlight is

What element is able to combine with itself and hydrogen to form large molecules ?