Answer:
Urban sprawl can also be called Urbanization and it means the movement of a population from the densely populated cities to the low populated areas around the cities which isn't usually well developed.
Urbanisation has a great impact on the environment because it leads to cutting down of trees which is also known as deforestation.
Deforestation is very harmful for the environment because it creates a form
of dis balance in the environment. Trees are very important to us humans because they provide us with raw materials and oxygen. This means we should always be mindful of deforestation processes.
Answer:
All options are correct.
Explanation:
Plasma membrane or cell membrane is made up of lipid bilayer and proteins may span or insert in the lipid bilayer. Carbohydrates moieties are attached in association with lipids and proteins.
Cell membrane plays an important role in providing the structural support of the cell. The important molecules present on plasma membrane acts as signalling molecule in the cell to cell communication. The extracellular stimuli or change in the membrane fluidity is also performed by plasma membrane. The extracellular fluid exchanges regularly as plasma membrane is semi permeable membrane. The cell membrane also helps in the cell adhesion process.
Thus, all are the functions of plasma membrane.
Answer:
From the point of view of the type of molecule that is obtained after the degradation of the hydrocarbon skeleton, amino acids can be classified as: glucogenic and ketogenic. The main difference between glucogenic amino acids and ketogenic amino acids is that glucogenic amino acids can be converted to pyruvate or other glucose precursors, while ketogenic amino acids can be converted to acetyl CoA and acetoacetylCoA.
Explanation:
Glucogenic amino acids are amino acids that break down to pyruvate, alpha-ketoglutarate, succinyl Co-A, fumarate, and oxaloacetate and are so named because the synthesis of glucose from these molecules is feasible. Both pyruvate and the Krebs cycle intermediates noted above can be converted to phosphoenolpyruvate and subsequently glucose through gluconeogenesis.Ketogenic amino acids are the amino acids that generate acetyl-CoA or acetacetyl-CoA and are called by this name because they can cause ketone bodies. Since mammals lack the proper enzyme system, these compounds can never be used as precursors for glucose biosynthesis. Of the twenty universal amino acids, fourteen are purely glucogenic and two are purely ketogenic (leucine and lysine). The remaining four (isoleucine, phenylalanine, tryptophan and tyrosine) are glucogenic and ketogenic simultaneously since a part of the hydrocarbon skeleton originates precursors for the biosynthesis of glucose (pyruvate or Krebs cycle intermediates) and the other part acetyl-CoA or acetacetyl -CoA.
There is one extra 21 comosome which is why it is down sydrome.