Answer:
a) is a way for a cell to give information about its activities.
Explanation:
Antigen processing and presentation is the process in which an antigen presenting cells expresses a peptide antigen on its cell surface in association with a classical class molecules
White blood cells and also called leukocytes, are a key part of the body's immune system, which is the body’s defense system against infection.
Eukaryotic cells and prokaryotic cells contain a cytoplasm and ribosomes. Eukaryotic cells have organelles and a nucleus.
Prokaryotic cells were most likely to evolve first because of the simple structure.
A. behavioral isolation is when the plant or animal acts a particular way to attract their counterparts, like mating rituals.
geographic isolation is the natural barrier preventing similar species from interacting. for example, Galapagos Islands are the only home of flightless cormorants because the islands are so far from any other land for them to invade.
Temporal isolation is when two of the same or similar species cannot reproduce as a result of mismatched sexual maturity.
B. the isolation of two frog species by mating call is behavioral isolation.
