Answer:
Cell membrane
Explanation:
"The cell membrane functions as a semi-permeable barrier, allowing a very few molecules across it while fencing the majority of organically produced chemicals inside the cell."
<span> A solid, steady energy level is very important for the brain. The brain uses almost one-third of our calories. Any fluctuations or low levels of energy will have enormous impacts on our nervous system and emotions as well. </span>
<span> This has been demonstrated and is well-known in the case of hypoglycemia. In this condition, the brain does not receive a steady supply of glucose. Common symptoms can mimic many emotional and physical disorders. These include fatigue, depression, anxiety, confusion and even violence and psychosis.</span>
<span> Emotionally speaking, when one is tired, decision-making and all other mental and emotional factors are more difficult. Thousands of people today suffer from low energy levels. This often results in feelings of depression, anxiety, mood swings, irritability, withdrawal and more.</span>
In Biology different animals have different reasons for choosing their mates. For instance they choose the mates for the cows that they breed, but others they just put two animals in the same bin. All in all I think it would be benificial for them to choose the mates especially if the animal will be used in food processing in some aspect.
<span />
Answer:
Fab or fragment antigen binding
Explanation:
Treating the antibody with a protease can cleave this region, producing Fab. that include the variable ends of an antibody. Material used for the studies .The constant region determines the mechanism used to destroy antigen. Antibodies are divided into five major classes, IgM, IgG, Iga, IgD, and IgE, based on their constant region structure and immune function.
Successful pollination, successful fertilisation and successful seed dispersal.