The Term Used to Designate How Many Bacteria or Viruses

question 20

Multiple Choice

The term used to designate how many bacteria or viruses are required to kill 50% of an experimental group of hosts is

• A) ID₅₀.
• B) LD₅₀.
• C) pathogenicity.
• D) infectivity.
• E) virulence.

Recognize and apply proper sentence construction to avoid grammatical errors.

Understand the use of passive and active voice in business writing and their impact on message clarity.

Understand the significance of parallel construction in enhancing readability.

Understand how to de-emphasize negative information in business communication.

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Definitions:

Sperm

The male reproductive cells or gametes involved in sexual reproduction, capable of fertilizing an ovum to produce offspring.

Fertilization

The process by which a sperm cell unites with an egg cell to form a zygote, initiating the development of a new organism.

Relaxin

A hormone produced by the placenta in the later months of pregnancy that increases flexibility in the ligaments and joints of the pelvic area. In men, relaxin is contained in semen, where it assists in sperm motility.

Uterus

A major female hormone-responsive reproductive sex organ of most mammals, including humans, where offspring are conceived and in which they gestate before birth.