Answer:Number one is "D"
Explanation:
Good thing i'm learning about this right now, Cellular Respiration needs Oxygen and hydrogen and photosynthesis needs Carbon and hydrogen.
I found the missing part of this question.
Statisics on Human Population
<span><span>Year A.D. Number of People (in billions)
</span><span>1650 .50
</span><span>1750 .70
</span><span>1850 1.0
</span><span>1925 2.0
</span><span>1956 2.5
</span><span>1966 3.3
</span><span>1970 3.6
</span><span>1974 3.9
</span><span>1976 4.0
</span><span>1980 4.4
</span><span>1991 5.5
</span><span>2000 6.0
</span><span>2004 <span>6.4
</span></span></span>
The answer is it took 200 years more to double the population from 0.50 billion to 1.0 billion people. The year was 1850.
It was in 1925 when the population double again from 1.0 billion to 2.0 billion.
<span>the one that best describes mtDNA is : C. mitochondrial DNA can be traced for generations. When we create an offspring, the parents will pass some of this DNA to the child.Scientist could trace the patterns in mtDNA to trace genetic lineage through dozen of generations. This phenomenon explains why we can still see several similarities between us and our grandparents.</span>
