What can a physician use to measure a person's body fat percentage?

Skinfold calipers

Explanation:

the official definition of skinfold calipers is: a pair of calipers used to form and measure the thickness of skinfolds in order to estimate the amount of body fat.

Skinfold measurement is a technique to estimate how much fat is on the body. It involves using a device called a caliper to lightly pinch the skin and underlying fat in several places. This quick and simple method of estimating body fat requires a high level of skill to get accurate results.

Root hairs increase the surface area of the roots for nutrient and water absorption

Explanation:

Root hairs convert minerals into glucose for immediate use by the cell Root hairs decrease the need for osmosis and diffusion in vascular tissue Root hairs prevent water loss in leaves through transpiration and gas exchange Root hairs increase the surface area of the roots for nutrient and water absorption

The correct answer would be that root hairs increase the surface area of the roots for nutrient and water absorption.

Generally, root hairs are extensions of epidermal cells of the roots of plants whose primary function is to increase the surface area of the root and increase the volume of soil the plant can mine for water and nutrients for metabolic purposes.

Water and nutrients diffuse from the soil through the root hairs and conducting tissues of the plant conduct these resources to the parts where they are needed for metabolic activities.