Answer:
Either due to mistakes when the DNA is copied or as the result of environmental factors such as UV light and cigarette smoke.
Answer:
B) Na+
Explanation: Na+ molecule is polar, oxygen and carbon dioxide are nonpolar molecules. The cell membrane is a <em>phospholipid bilayer</em> made up of lipid molecules with polar and nonpolar ends. Since it is a bilayer, two phospholipid layers are arranged, one on the other in such a way that one faces the back of the other. The non polar ends are away from outside and inside of the cell, while the polar ends faces towards all the molecules inside and outside the cell.
Since polar-polar molecules repel each other, Na+ can't pass through the cell membrane easily. So it uses the proteins attached the cell membrane inside and outside to transport such molecules by using energy in terms of ATP.
Options for the question have not been given. They are as follows:
A. a lack of urban health care capacity
B. cultural disregard for women and women's health
C. prudence's family medical history
D. a lack of previous medical problems
Answer:
C. prudence's family medical history
Explanation:
Sociological factors include the factors related to human society. These factors stem from the way a society functions and effects the people which are a part of it. The way the society is structured and developed, impacts the people.
Prudence died during childbirth. There can be many sociological causes of her death like low status of women or poor medical facilities in her society. However, her family medical history will not be considered a sociological factor. Family medical history also depends on other factors like genetic composition of the family which is not a sociological factor.
The appropriate answer is C. ANCESTRAL FINCH. The study of these birds on the Galapagos island led to Darwin proposing his theory of natural selection. Darwin collect and preserved samples of the finches he observed while on his travels.
He did not observe anything unique about the birds until after he returned home. He focused on the differences in the beaks of the birds. It is then that he started to work on his revolutionary theory.
