An agar plate for counting colonies and maximizing statistical validity should ideally contain
A) 1 to 100 colonies.
B) 50 to 100 colonies.
C) 30 to 300 colonies.
D) 100 to 1000 colonies.
Answer: C
You might also like to view...
If a biochemist discovers a new molecule, which of the following pieces of data would allow her to draw the conclusion that the molecule is a steroid hormone?
I) The molecule is lipid soluble. II) The molecule is derived from a series of steps beginning with cholesterol. III) The molecule acts at a target tissue some distance from where it is produced. IV) The molecule uses a carrier protein when in an aqueous solution such as blood. A) only I and III B) only II and IV C) only I, III, and IV D) only II and III E) I, II, III, and IV
Sterilizing filters have a pore size of 0.22 ?m. Which of the following statements is true?
A. Bacterial cells are typically between 1-10 ?m and pass through the filter, whereas most viruses are between 20 and 200 nm and are therefore blocked. B. Bacterial cells are typically between 1,000-10,000 nm and pass through the filter, whereas most viruses are between 20 and 200 nm and are therefore blocked. C. Bacterial cells are typically between 1-10 ?m and are blocked by the filter, whereas most viruses are between 20 and 200 nm and therefore pass through. D. Bacterial cells are typically between 1-10 nm and are blocked by the filter, whereas most viruses are between 20 and 200 ?m and therefore pass through.
The opening of which of the following is covered
with ciliated, fingerlike projections that produce a sweeping action? a. ovary b. uterus c. vagina d. oviduct e. follicle
Muscles are connected to bones by
A) cartilage. B) ligaments. C) tendons. D) myofibrils.