In performing a bacterial spore staining techniques, the counterstain is

A. Carbolfuchsin
B. Methylene blue
C. Malachite green
D. Safranin
E. The right answer is not listed


Ans: D. Safranin

Biology & Microbiology

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Parenchyma ground tissue is the site of photosynthesis

a. True b. False

Biology & Microbiology

Three of the following statements are correct. Identify the statement that is not correct regarding genetically modified organisms.

A. There are no risks associated with GM crops. B. GM crops have been produced with increased nutrition. C. GM animals are not in our food supply. D. GM crops have been produced that are disease resistant.

Biology & Microbiology

The Florida panther, Puma concolor coryi, is one of the most threatened species on Earth, with only 80-00 individuals remaining. Their population is most threatened by humans, habitat loss, and their own poor health due to genetic diseases.  Some conservationists want to introduce new individuals from Texas, the mountain lion, Puma concolor. Scientists are currently uncertain whether the Florida panther and the Texas mountain lion are the same or different subspecies.What is the most likely explanation for the Florida panthers' poor health?

A. Environmental pollutants are poisoning the panthers. B. The panthers are inbreeding, so more individuals will be homozygous for recessive mutations. C. Environmental pollutants are causing genetic mutations in their DNA. D. The panthers are unable to find food, so they are starving to death. E. The panthers are forced to live in close proximity to each other, causing a prevalence of communicable disease.

Biology & Microbiology

Filtration methods, followed by growth of the bacteria trapped on the filters in growth media, are used to count bacteria present in very low concentrations, such as in lakes and streams

Indicate whether the statement is true or false

Biology & Microbiology