A chemical change has occurred because the wood has turned into a substance that can't be changed back to it's original form. The wood has turned to ash, chemical changes are non reversible.
Answer:
Explanation:
An epitope (antigen determinants) is the part of an antigen that interacts with antibodies.
Epitopes bind to antibody molecules via T-cell receptors in a region known as complementarity determining region (CDR) and the Major histocompatibility complex (MHC) participates in this by forming complexes with peptides. The MHC helps the T-cell to recognise epitopes of antigens and discriminate self from non-self.
The MHC, T-cell works together to bring about the binding of epitopes to antibody molecules.
The main function of MHC molecules is to bind to antigens derived from pathogens and display them on the cell surface for recognition by the appropriate T-cells.
It should be noted that the amino acid sequence of the CDR determines the shape of the binding sites of the T-cell and the antibody that can be bound by an epitope.
The consequences of the interactions are;
1. MHC-peptide complex helps T-cell receptors bind to epitopes and thus antibodies
2. The shape of the binding sites (CDR) determines the antibodies that can be attacked any abnormalities at this point will affect the adaptive immune system.
Answer:
a) aquifers
Explanation:
Looking at the answers choices, 3 of the answers have something in common. Oceans, rivers, and lakes all have their surfaces exposed to the atmosphere—including the direct path to the sun. This means that they evaporate the most into the atmosphere.
Aquifers are underground wells, meaning they only evaporate slightly into the atmosphere due to high levels of heat energy. However, they stay mostly underground and are not in the direct path of the sun's energy.
Answer:
<u>Passive immunity</u> is passed from a mother’s breast milk to her nursing infant.
Anne Marie recently had a baby girl. She has read all about the benefits of breastfeeding her newborn. Anne Marie knows that her milk can help keep her newborn from contracting a disease. She talks with the baby’s pediatrician, who confirms that the infant will receive temporary Passive Immunity from antibodies transferred in Anne Marie’s breast milk.
Explanation:
Passive immunity can be described as a kind of immunity in which a person gets immunity or antibodies from another source rather than his/her own body producing the immune cells. Active immunity can be described as an immunity which is triggered by a person's own immune cells.
In infants, mothers pass on antibodies to the child by breastfeeding. Hence, it is a type of passive immunity. Passive immunity cannot be as long-lasting as active immunity. It only lasts for some weeks.
Yes it does because it has more weight and mattee
