I believe its the first one
Answer:
D: 4.6 x 
Explanation:
4.6 x 10^{9} = 4,600,000,000
Earth is approximately, 4.6 billion = 4,600,000,000 = 4.6 x 10^{9}
Answer:
The chlorophyll inside the plants cells give the plants its pretty, green colour.
The unit of measurement in an ecological footprint is the global hectare.
Answer:
The correct answer is A.) Forms the plant cell wall.