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Which of the Following Is the Only Animal Able to Be

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Which of the following is the only animal able to be infected with HIV but can no longer be used for research due to ethical reasons and cost?


Definitions:

Vascular Bundle

In plants, primary phloem and primary xylem enclosed by a bundle sheath.

Vascular Tissue

Specialized tissue in plants that involves the transport of water and nutrients.

Guard Cells

Specialized cells in the epidermis of leaves and stems that control the opening and closing of stomata to regulate gas exchange.

Stomata

Small openings between two guard cells on the underside of leaf epidermis, through which gases pass.

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