Which of the Following Observations Provides the Strongest Evidence Against

question 17

Multiple Choice

Which of the following observations provides the strongest evidence against root pressure being the principal mechanism of water transport in the xylem?

• A)Not all plants have roots.
• B)Not all soils have high concentrations of ions.
• C)It requires movement of water into the xylem from surrounding cells in the roots.
• D)Over long distances,the force of root pressure is not enough to overcome the force of gravity.
• E)It requires development of a water potential gradient between roots and shoots.

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Definitions:

Sebaceous Gland

A small oil-producing gland present in the skin of mammals, which secretes sebum into the hair follicles to lubricate the skin and hair.

Hair Follicle

A dynamic organ located in the dermal layer of the skin, from which hair grows, and is a site for sebaceous glands and nerve endings.

Sebaceous Gland

A gland in the skin that produces sebum, an oily substance that helps to lubricate and protect the skin.

Epidermis

The outermost layer of skin, serving as a protective barrier against environmental threats and regulating water loss from the body.