Biology, 09.06.2021 14:00 gabelawson6996
CHAPTER ONE THE CHEMICAL COMPONENTS OF THE CELL Biology Form Three Student Book
1. What is the percentage by mass of oxygen, carbon, hydrogen, nitrogen,
phosphorus and sulfur in the earth and in the human body? What do you
observe?
(MB
2. Which elements have a higher percentage in the nature and in the human
body? State some compounds that contain these elements in their struc-
ture.
3. Many chemical substances enter the structure of the of the cell. In your
opinion, what is the importance of these substances? Why have you select-
ed these substances?
4. There are other elements that exist in a fewer percentage, search these
elements and state the percentage abundance of each in the cells of living
organisms.​
Answers: 3
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Explain wether the alleles in figure 14-1 show dominance incomplete dominance or codominance
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Megan looks up at the night sky. she counts 20 stars that appear to be directly overhead. how many of these stars will appear to have rotated in a circle from east to west through the night? a. none of them b. ten of them c. all of them d. five of them
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CHAPTER ONE THE CHEMICAL COMPONENTS OF THE CELL Biology Form Three Student Book
1. What is the perc...
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