Plant Transport

Which of the following is a correct statement about a difference between xylem and phloem transport?

Xylem sap moves up; phloem sap moves up or down

what characterizes the rates of photosynthesis and transport in a plant on a dry cloudy day

both the photosynthesis and transpiration rates are low

In the roots the _______ forces water and solutes to pass through the plasma membrane of ___ cells before entering the _____

casparian strip....endodermis.....xylem

Which tissues act as a filter on the water absorbed by root hairs

endodermis

All of the following are involved in the movement of sucrose into the phloem in most plants except

facilitated diffusion

_____ cells are the cells that regulate the opening and closing of stomata, thus playing a role in regulating transpiration

gaurd

_____ bonds are responsible for the cohesion of water molecules

hydrogen

A plant cell placed in a solution with a lower more negative water potential will

lose water and plasmolyze

Plants must always compromise between ____ and ______

maximizing photosynthesis ..... minimizing water loss

Mycorrhizae are

mutualistic associations between plant root and fungi

which of the following is an adaptation that enhances the uptake of water and minerals by roots

mycorrhizae

which of these are symbiotic associations

mycorrhizae

Channels in between cells

plasmodesmata

what would enhance water uptake by a plant cell

positive pressure on the surrounding solution

which term describes an area where sugars are used or stored

sink

The solute most abundant in phloem sap is

sugar

which structure or compartment is part of the symplast

the interior of a vessel element

Which of the following statements about the distribution of sap through a plant is true?

the mechanism that explains the movement of sugars through a plant is called the pressure-flow hypothesis

Which one of the following refers to the loss of water through the stomata in plant's leaves?

transpiration

_____ provides the major force for the movement of water and solutes from roots to leaves

transpiration

The proton pump

uses the energy stored in ATP to produce a hydrogen ion gradient across membranes.

Xerophytes minimize water loss by _______

using the cam pathway

Movement of xylem sap from roots to leaves

usually depends on tension, or negative pressure potential

which of the following statements about xylem transport is true

water and minerals move through the root cortex into the xylem and upward through the stem and into leaves