There is variation in DNA.
Answer:
field studies
Explanation:
The documentation and collection of descriptive details of events in nature such as amounts, sizes, colors, smell , behavior, texture e.t.c are all categorized as field studies.
It involves the gathering of raw data outside a laboratory.
- Often times, based on the needs of an experiment, it is desirable to corroborate laboratory studies with field evidences.
- The approach in gathering such data varies from discipline to discipline.
- Most field sampling are usually done in an uncontrolled environment.
According to the preface to The Pluto Files, what best describes the information the book will include a record of Pluto's rise and fall as a planet. The said book was originally published last January 26, 2009 by the author <span>Neil deGrasse Tyson.</span>
The correct order of steps in a gram staining procedure is:
(4) the specimen is treated with a stain called crystal violet.
(1) iodine is added as a fixative or mordant.
(3) the specimen is flushed with alcohol to dehydrate peptidoglycans and trap the stain.
(2) the specimen is treated with a stain such as safranin or fuchsin (a pink stain)
Gram staining is a common staining technique which helps to classify the bacteria into two categories: Gram positive and Gram negative. Gram positive bacteria appear violet in color and Gram negative bacteria appear to be pink. This color difference appears due to the difference in the bacterial cell walls.
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