Blog

What is the mordant used in the Gram staining procedure?

Name a media that selects for Gram Positive bacteria.

Serial dilutions are made from a broth culture of Shewanella putrefaciens in order to determine the number of bacteria in the culture.  Following the dilution series, 0.1 ml of the 10-7 dilution tube is plated on Plate A, 0.1 ml of the 10-8 dilution tube is plated on Plate B.  RESULTS Plate A:  427 colonies Plate B:  87 colonies Question: What was the number of bacteria in the original S. putrefaciens broth culture? Note: Make sure your answer reflects proper scientific notation! Use the ^ to denote an exponent, i.e. 1 x 10-4 would be written as 1 x 10^-4. Note: Don’t forget the units. No points without units!

What is the sugar that gets fermented on a MacConkey plate?

What is the common name for Gleditsia triacanthos var. inermis? What does the variety name ‘inermis’ mean or refer to?  

List at least one ID feature you can use to distinguish Pelargonium x hortorum (zonal geranium) and Pelargonium peltatum (ivy geranium).

Which of the followings are true about plants in the family of Euphorbiaceae? milky sap very small flowers have colorful petal-like bracts (modified leaves) borne beneath the true flowers.

Ipomoea lobata produces one-sided racemes of tubular flowers that initially are red in color but turn orange, yellow, then cream as they age.

Jacobaea maritima (Senecio cineraria,Dusty Miller) is a popular foliage plant grown for its cool, silvery, woolly-felted leaves. However, the silver leaves (hairy leaves) are susceptible to leaf rot in the South due to high humidity.

Chilopsis linearis (Desert Willow) has willowlike leaves and showy flowers.