ID50 Describes

question 20

Multiple Choice

ID50 describes

• A) the number of cells or virions which will kill 50 individuals.
• B) the number of cells or virions needed to establish an infection in 50 percent of exposed hosts.
• C) the amount of toxin lethal to a 50- pound human or other animal.
• D) the number of cells or virions which will kill 50% of exposed hosts.
• E) the percentage of individuals which will develop an infection after exposure to 50 cells or virions.

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Definitions:

Sensorimotor Stage

The first of Piaget's four stages of cognitive development, from birth to about 2 years, where infants learn about the world through basic actions such as sucking, grasping, looking, and listening.

Deliberate

Intentional or carefully considered action or decision.

Sensorimotor Stage

The first stage of cognitive development according to Jean Piaget, where infants learn about the world through their senses and motor activities.

Adaptation

The process by which individuals or species adjust to changes in their environment, enhancing survival and fitness.