5. found only in plant cells, i'm as green as can be! i make food for the plant from the sun's
energy!

Observation and experimentation have led many scientists to accept a theory about the origin of the universe. this theory is called the big bang theory. scientific evidence collected and observed by scientists around the world suggests that the universe is ever expanding from a hot and dense initial state. what makes this a scientific theory? (2 points)

What is the percentage of hydrogen in c2h4

Which of the following is true about the speed of light? it depends on the wavelength.