Over the years, greater controversy has arisen over environmental issues as the issues addressed have become more complex and less easily identifiable.
Prokaryotes are single-celled organisms of the domains Bacteria and Archaea. All prokaryotes have plasma membranes, cytoplasm, ribosomes, a cell wall, DNA, and lack membrane-bound organelles. Many also have polysaccharide capsules. Prokaryotic cells range in diameter from 0.1–5.0 µm.
Like a prokaryotic cell, a eukaryotic cell has a plasma membrane, cytoplasm, and ribosomes, but a eukaryotic cell is typically larger than a prokaryotic cell, has a true nucleus (meaning its DNA is surrounded by a membrane), and has other membrane-bound organelles that allow for compartmentalization of functions. Eukaryotic cells tend to be 10 to 100 times the size of prokaryotic cells.
Answer:
Parkinson's disease (PD) is a neurodegenerative disorder that affects predominately dopamine-producing (“dopaminergic”) neurons in a specific area of the brain called substantia nigra.
Explanation:
Answer:
The common characteristics between fatty acids, triacylglycerols, phosphoglycerols, sphingolipids, polyisoprenoides and sterols are that they are nonpolar substances. Thus, these substances are soluble in nonpolar solvents, unlike water.
Explanation:
Lipids are the most diverse range of biomolecules that have a hydrocarbon chain as the backbone. The hydrocarbon chain is formed of series of carbon atoms and balanced by hydrogen atoms. Due to their close electronegativity, the hydrocarbon chain renders the lipid its nonpolar property. Water is a polar solvent, and thus the lipid molecules are not soluble in it. The metabolism of lipids causes oxidation of fatty acids, that in turn generate energy.
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