Answer:
The correct answer is: 2) According to the given data, the surface area of all erythrocytes is (4.74x10^9)/(100x10^8)m^2. This is almost half of the surface area formed by a monolayer as Gorter and Grendel estimated it, leading to the conclusion that the surface of each cell was covered with two layers of lipids.
Explanation:
Each erythrocyte has a surface of 100 μm^2, which is equal to 100x10^-8 m^2. And to calculate the total area of erythrocyte counted, you should multiply the number of cells with the surface of one cell. This is (4.74x10^9)*(100x10^-8), which is equal to (4.74x10^9)/(100x10^8)=0.47m^2. This is approximately half of the surface area formed by the monolayer that was estimated. This is evidence that allows to conclude that the erythrocyte membrane is a bilayer
Answer: The statement is true.
Overgrazing happens when the animals or livestock feed on pasture when there is no vegetation present. Overgrazing has devastating impact on the environment as drought can strike any time and lack of precipitation means that farming in that area will also be impacted. The amount of rain received is not under the control of farmers and when the drought conditions extend the replenishment of pasture will not happen. Lack of precipitation will cause the plants to die and eventually the livestock feeds on the available plants to survive.
Plants, trees or crops help in increasing the amount of rainfall by the process of transpiration which is a process in which plants loose water as vapours during the photosynthesis. This water released by the plants increases the moisture content of air making the air saturated and brings about rainfall.
Answer:
C-Polysaccharides that function in energy storage are built from α glycosidic linkages, whereas polysaccharides used in structural support form straight chains that bond with adjacent chains.
Explanation:
When monosaccharides undergo a dehydration reaction water molecules are released; this process called covalent bonding forms an 1-4 glycosidic linkage. In energy storage polysaccharides, the linkage occurs at Carbon 1 while glucose is in its α- form; in starch, resulting chains are made up of unbranched amylose and branched amylopectin.
However, in structural polysaccharides like cellulose, repeating monomers in the β configuration; the alternating glucose monomers form unbranched β, 1-4 glycosidic linkages. These tend to bunch together, with adjacent chains joined by hydrogen bonds, making the polysaccharide rigid and with high tensile strength.
At the very top of the swing the velocity=0. If the velocity is 0 then the kinetic energy is 0 as well because kinetic energy is the energy of movement.
Answer: Stage M (Mitosis).
Explanation: The root tip is a meristem and this means that the root tip is responsible for the root growth. To do that, root tip cells divides actively to form root tissues, so that if we look an onion root tip under the microscope, the majority of cells will be in division, called mitosis, or Stage M of the cell cycle.