<span>Too little is known about pre-Archean time, from the origin of Earth to 3.8 billion years ago, to divide that period into units.</span>
I think the answer may be D. But don’t answer yet, I may be wrong.
effect is from the modification of land surfaces. Waste heat generated by energy usage is a secondary contributor.
Chapter 3:
1. Her aunt created a doll out of towels and sowed eyes on the doll.
2. Dr.Alexander Graham Bell was a Scottish born scientist, inventor, engineer, and innovator who was credited with patenting the first practical telephone.
Chapter 4:
1. Because she is blind and deaf.
3. She lacks remorse/sympathy because she is blind and deaf and does not sense the environment.
4. When Miss.Sullivan arrived, Helen was taught to communicate through finger play. She was often frustrated and angry when she could not communicate.
The answer is A. i say this because when they use sunlight as energy, cabon dioxide and water are converted into organic material, they are used as cellular functions ( such as biosynthesis and respiration ). An able autotroph is able to make his own food.