B cells produce antibodies (option C), whereas doctors recommend that people get a new flu shot every year because the flu virus changes every year (Option D).
Mutation refers to any type of alteration of the genetic material (DNA) in the genome of an organism or virus.
In conclusion, B cells produce antibodies (option C), whereas doctors recommend that people get a new flu shot every year because the flu virus changes every year (Option D).
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The hydrilla will increase the amount of natural plant growth in the estuary.
The hydrilla is an invasive species, and its presence will have an overall negative effect on the estuary.
The hydrilla needs to be trimmed back every year.
Answer:
The Phospholipid head which contains a phosphate group
Explanation:
The cell membrane contains phospholipids.
The Phospholipid bilayer is made up of phospholipids
Phospholipids consist of a hydrophobic tail (non-polar and is repelled by water)
It also consists of a polar head which is polar because it has a phosphate group which is negatively charged and therefore is hydrophilic (water-loving)