Which Is a Source of Radiation

question 69

Multiple Choice

Which is a source of radiation?

• A) radioisotopes
• B) heterocyclic amines
• C) ultrasound tests
• D) television screens

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Definitions:

Sieve Tube Elements

Cells that conduct dissolved sugar in the phloem of flowering plants.

Companion Cells

Specialized cells found in the phloem of plants that support the function of sieve tube elements by aiding in nutrient transport and metabolic processes.

Specialized Cells

Cells that have developed unique structures and functions to perform specific tasks within an organism.

Meristematic Tissue

Plant tissue found in areas of growth that consists of undifferentiated cells capable of cell division.