Sugar crosses the cell membrane from an area of high concentration to an area of low concentration using special proteins embedded in the membrane. Which of the following types of cell transport is this?
Choose 1
Choose 1

(Choice A)
A

Simple diffusion

(Choice B, Checked)
B

Active transport

(Choice C)
C

Facilitated diffusion

(Choice D)
D

Osmosis

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C active transport

Explanation:

The concentration of substance A is higher inside the cell, so energy is needed to move it against its concentration gradient. This process is active transport.

total distance travelled = 60 miles

total time taken =1.5 hours

average speed = total distance / total time

60 / 1.5

= 40

therefore, average speed = 40 m/h

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luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.