Index fossils delineate the epochs of geologic time. In
order for an organism to be considered as an index fossil it must possess at
least one of the four characteristics: it must be unique, extensive, abundant
and inadequate in geologic time. Most type of organism may be considered
distinctive but not widespread which tolerate them to inhabit all over the
world. While some are considered abundant that they were able to be developed as
the most susceptible to environmental modification and destruction. Just like
the trilobites, this is known as a precise example of index fossil for the
Paleozoic rocks that is inhabit in all parts of the ocean. They develop new
species throughout their being, which is according to some reports, lasted 270
million years from Middle Cambrian time to the termination of the Permian
Period. Because of their ability to travel, they tend to dwell in global areas.
The trilobites are huge that they can be used in a study even without a
microscope and they are also hard-shelled invertebrates which make them petrified
effortlessly.
You forget to close the lid on the milk, that causes it to spoil.
I hope this helps!
Answer:
R is an abbreviation for radical, when the term radical applied to a portion of a complete molecule (not necessarily a free radical), such as a methyl group.
Answer:
1.What type of reaction is the health care provider concerned about and why?The health care provider concerned about the an IgE mediated allergic reaction. Inthe past, E.O. was given penicillin and had a sign of immune response to the drug.E.O. body has already produce Ig. E. If she uses the penicillin again, it may cause an increased allergic reaction. 2.Explain the role of IgE and mast cells in type I hypersensitivity reactions. Why might E.O. react adversely to the antibiotic with the first use?-The first exposure to an antigen causes B-lymphocytes to produce IgE-The second exposure to the same antigen causes cross links the IgE and mast cell degranulation and release of histamine, serotonin lead to rapid constriction of vessels and causing the hypersensitive reaction. -In the past, E.O.’s body had not produce the IgE immuglobin to penicillin. But at this point, her body is already produce it, and she might has some reaction to the drug. 3.What would you tell E.O.’s parents to look for when they are assessing for a reaction?Itching, angioedema, edema of larynx, uticaria, bronchospasms, vomiting, abdominal cramps, diarrhea
