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A Novel, Unknown Pathogen Is Devastating a Particular Crop, with Nearly

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A novel, unknown pathogen is devastating a particular crop, with nearly 100% mortality of infected plants. You find that the spread of disease within infected plants can be stopped by removing the bark and stem tissue (down to the vascular cambium) in a band around infected stems, and that the first signs of necrosis are rings of dead cells surrounding (completely or in part) apparently living tissue. You then assay the cells inside the necrotic rings expecting to find a high concentration of:


Definitions:

Late Bloomer

An individual, often a child or adolescent, who develops skills, abilities, or matures later than their peers, but eventually reaches or surpasses expectations.

Types Of Play

Various forms of play classified by their nature and social dynamics, such as solitary play, cooperative play, and competitive play.

Sensorimotor

A stage in Jean Piaget's theory of cognitive development, where infants learn about the world through their senses and motor activities.

Pretense/Symbolic

The act or practice of representing things through symbols, or engaging in behavior that imitates, creates, or signifies something beyond itself, such as in play.

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