The Continental Drift theory states that the 7 continents were all once one big piece. Pangea broke into several pieces by convergent and divergent boundaries. The continents almost fit together as an exact puzzle.
hope this helps !
important circle parts
Radius: the distance from the center of the circle to its outer rim.
Chord: A line segment whose endpoints are on a circle
Diameter: A chord that passes through the center of the circle
Hope this helps :)
Answer:
The third stage in the synthesis of fatty acids is the synthesis of palmitic acid (letter e)
Explanation:
The synthesis of fatty acids takes place in the cytoplasm of the cell. The first step is the transport of acetyl-CoA to the cytoplasm. This came in the form of citrate usually from the pyruvate generated in the glycolysis from the mitochondria. The citrate is enzymatically transformed into acetyl-CoA.
Once the acetyl-CoA is in the cytoplasm, this is transformed into malonyl-CoA. This molecule will be the donor of two carbons in the synthesis of fatty acids.
In the final step takes place a cyclic process of reactions (condensation, reduction, hydration and second reduction) to synthesize the palmitic acid ( 16 carbons) by the fatty acid synthase.
Answer:
The presence of cholesterol in the plasma membranes of some animal cells <u>enables the membranes to stay fluid when cell temperature drops</u>.
Explanation:
Cholesterol is an essential lipid in the basic structure of cell membranes. The membranes must have a fluid structure so that the proteins integrated in them can move ''horizontally'' to interact with their ligands and with other proteins. With excess saturated fat the membranes become rigid, but only with the necessary unsaturated fat the membranes are extremely fluid, and very sensitive to changes in temperature. Cholesterol stabilizes the structure of the membranes; preventing the collapse and crystallization between lipid chains that would lead to loss of fluidity and excessive rigidity in the membrane. By decreasing the temperature; as temperatures drop, fluidity decreases, an effect that partially counteracts the presence of cholesterol.
Answer: Blood
Explanation:
Blood can transport nutrients, vitamins and minerals to the cells.
