Plant Biol 1401 TTU Test #2 Exam
Questions & Answers (Grade A+)
what do plants use water for? -
correct answer ✅metabolic processes
uptake
translocation
structure
germination/ new structure
temperature regulation
Brownian Motion -
correct answer ✅the constant random motion of ions and
molecules
diffusion -
correct answer ✅movement of molecules from an area of high
concentration to an area of low concentration
(high to low concentrations)
osmosis -
correct answer ✅molecules of a solvent tend to pass through a
semipermeable membrane from a less concentrated solution into a
more concentrated one, thus equalizing the concentrations on each
side of the membrane.
,Plant Biol 1401 TTU Test #2 Exam
Questions & Answers (Grade A+)
(low to high concentrations)
what are the components of cell water potential -
correct answer ✅guard cells, stomata, cell wall
water potential -
correct answer ✅Water potential is a measure of the potential
energy in water as well as the difference between the potential in a
given water sample and pure water. ... The internal water potential
of a plant cell is more negative than pure water; this causes water
to move from the soil into plant roots via osmosis..
transpiration -
correct answer ✅the movement of water through a plant from the
roots to the leaves and is released into the air through the stomata
how does transpiration occur -
correct answer ✅the stomata opens, creating a water potential
gradient that pulls water from the roots.
Mesophyll cells dry out, pulling from the adjacent cells via osmosis;
then from veins; then xylem; then from root
, Plant Biol 1401 TTU Test #2 Exam
Questions & Answers (Grade A+)
what are guard cells and what are their function? -
correct answer ✅regulate gas exchange between the leaf and
atmosphere by changing turgor pressure to open/close stomata
open to increase CO2 intake and cool leaf
closes to reduce water loss
how does the environment influence transpiration rates?
high temperature: -
correct answer ✅increases transpiration rates
how does the environment influence transpiration rates?
high humidity: -
correct answer ✅reduces transpiration rates
how does the environment influence transpiration rates?
High CO2: -
correct answer ✅increase transpiration rate to a point
how does the environment influence transpiration rates?
high winds: -
correct answer ✅increase transpiration rates
Questions & Answers (Grade A+)
what do plants use water for? -
correct answer ✅metabolic processes
uptake
translocation
structure
germination/ new structure
temperature regulation
Brownian Motion -
correct answer ✅the constant random motion of ions and
molecules
diffusion -
correct answer ✅movement of molecules from an area of high
concentration to an area of low concentration
(high to low concentrations)
osmosis -
correct answer ✅molecules of a solvent tend to pass through a
semipermeable membrane from a less concentrated solution into a
more concentrated one, thus equalizing the concentrations on each
side of the membrane.
,Plant Biol 1401 TTU Test #2 Exam
Questions & Answers (Grade A+)
(low to high concentrations)
what are the components of cell water potential -
correct answer ✅guard cells, stomata, cell wall
water potential -
correct answer ✅Water potential is a measure of the potential
energy in water as well as the difference between the potential in a
given water sample and pure water. ... The internal water potential
of a plant cell is more negative than pure water; this causes water
to move from the soil into plant roots via osmosis..
transpiration -
correct answer ✅the movement of water through a plant from the
roots to the leaves and is released into the air through the stomata
how does transpiration occur -
correct answer ✅the stomata opens, creating a water potential
gradient that pulls water from the roots.
Mesophyll cells dry out, pulling from the adjacent cells via osmosis;
then from veins; then xylem; then from root
, Plant Biol 1401 TTU Test #2 Exam
Questions & Answers (Grade A+)
what are guard cells and what are their function? -
correct answer ✅regulate gas exchange between the leaf and
atmosphere by changing turgor pressure to open/close stomata
open to increase CO2 intake and cool leaf
closes to reduce water loss
how does the environment influence transpiration rates?
high temperature: -
correct answer ✅increases transpiration rates
how does the environment influence transpiration rates?
high humidity: -
correct answer ✅reduces transpiration rates
how does the environment influence transpiration rates?
High CO2: -
correct answer ✅increase transpiration rate to a point
how does the environment influence transpiration rates?
high winds: -
correct answer ✅increase transpiration rates
