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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Answer:
the correct order of events in the nutritional processing of this food is ingestion- digestion- absorption- egestion.
Explanation:
1.) Ingestion involves taking food, drink, or another substance into the body by swallowing to aid in digestion.
2.) Digestion involves the breakdown of large insoluble food molecules into small water-soluble food molecules so that they can be absorbed into the watery blood plasma.
3.)Absorption involves the in take of the digested food into the bloodstream
4.) Egestion involves the removal of undigested food substance from the body.
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1. a. Toxicodendron
2. c. Eukaryotes
3. a. Felis domesticus
4. b. Plantae
5. a. Protist
6. While protists are unicellular eukaryotes can be both single or multicelled. Most protists have special organelles and a nuclear membrane which differs from bacteria.
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DNA evidence and the fossil record indicate are the ancestors of the living cetaceans were land-dwelling mammals. DNA evidence allows to trace the evolutionary origin of taxonomic groups.
DNA evidence refers to the linear order of nucleotides, which can be used to trace the evolutionary origin of a particular taxonomic group.
When the linear order of DNA nucleotides is conserved, it is known as sequence homology.
Fossils are preserved remains of organisms that once lived on the Earth, which can also be used as evidence to trace the evolutionary origin of a given group.
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