The dose of an antigen that kills 50% of animals in a test group and is used to estimate the virulence of a pathogen is known as
A) Antigen dose50.
B) Virulence-50.
C) LD50 (lethal dose50).
D) Death rate-50.
Answer: C
You might also like to view...
Which of the following measures is used to determine a substance's polarity?
A) partition coefficient B) extinction coefficient C) polarity factor D) asymmetrical distribution points E) polarity determining factor
Answer the following statements true (T) or false (F)
1. If sucrose is composed of both glucose and fructose, then sucrose must be a monosaccharide. 2. Lipids and carbohydrates can both be used by animals to store energy. 3. Saturated fats are composed of fatty acids with several double bonded carbons. 4. A polyunsaturated fat contains fatty acids with multiple double bonded carbons.
Which type of plant would be the most nutritionally valuable to a human?
A) a plant that has no ground tissue B) a plant with 10% ground tissue and 90% vascular tissue C) a plant with minimal reproductive organs D) a plant with 90% ground tissue and 10% vascular tissue
Why is the scientific method used?
What will be an ideal response?