The correct answer is -
E. double coincidence of wants
Proteins, among the most complex of all organic compounds, are composed of amino acids (see Figure 2-4), which contain carbon, hydrogen, oxygen, and nitrogen atoms. Certain amino acids also have sulfur atoms, phosphorus, or other trace elements such as iron or copper.
Answer:
Which is the best example of physical weathering?
The cracking of rock caused by the freezing and thawing of water
Explanation:
The cracking of rock caused by the freezing and thawing of water is the best example of physical weathering
None of the choices are correct. the kinks are caused by double bonds, which make the chain unsaturated
Answer:
yes
Explanation:
similar structure can indicate relatedness