WSU BIO 106 FINAL COMPREHENSIVE
REVIEW SHEET ACCURATE QUESTIONS
AND ANSWERS PREMIUM RESOURCE
●● In the root, plants need to take up more CO2 or O2?
Answer: More O2
●● Is the need for CO2 and O2 in leaves the same when compared to
roots?
Answer: The difference is because of what the plant needs at that certain
spot. The CO2 is needed for photosynthesis to make sugar for the plant
●● If you look at the apoplast and the symplast, which of the following
statements are true?
Answer: In the apoplastic route water and solute move along the
continuum of cell walls and extracellular spaces
●● If you add sugar to water does the water potential increase or
decrease?
Answer: Decrease
●● How is osmosis defined?
Answer: Diffusion of free water
,●● What is a protoplast?
Answer: Living part of the cell which includes plasma membrane
●● How would you define transpiration?
Answer: Loss of water vapor through cells
●● The Casparian Strip is located in the endodermis. What is its
function?
Answer: Blocks passive flow of materials into the root vascular tissue of
the plant
●● What are rhizobia
Answer: They can generate ammonia from atmospheric nitrogen
●● Why are rhizobacteria beneficial for plants?
Answer: They promote growth through chemicals they produce and they
also produce antibodies that protect the roots from disease. Absorb toxic
metals
●● Why are rhizobacteria beneficial for agriculture?
Answer: They can increase crop yield and reduce the amount of fertilizer
and pesticides needed
,●● What is a nodule and what is the reason why they appear sometimes
reddish?
Answer: It is composed of plant cells that have been "infected" by
Rhizobium. They appear reddish because of a molecule named
leghemoglobin, an iron containing protein that binds reversibly to
oxygen. Similar to the hemoglobin in humans red blood cells
●● What does the enzyme 'nitrogenase' catalyze?
Answer: Atmospheric nitrogen to ammonia
●● What is the difference between endo- and ectomycorrhizae?
Answer: Ecto do not penetrate the root cortex, whereas endo grow into
the invaginations of the root cell membranes called arbuscules
●● Do the mycorrhiaze have a symbiotic or mutualistic relationship
Answer: Mutualistic
●● Why have some plants adapted to a carnivorous live style
Answer: They lack some of the minerals so they eat insects. Most of it is
because of poor nitrogen in the soil
●● How many elements have been found in plants, and how many of
these are considered to be 'essential'?
, Answer: 17 and 9 are essential
●● Based on a plant's dry mass, what are the four most common
macronutrients found in plants?
Answer: Carbon, oxygen, hydrogen, nitrogen
●● How can you distinguish a plant that suffers from phosphorus
deficiency versus a nitrogen-deficient plants
Answer: Phosphorus - reddish purple margins
Nitrogen - yellowing of plant at the tip and going towards the center of
plant
●● What is 'humus' and why is it important for the plant?
Answer: The remains of dead organisms and other organic matter. It is
important to the plant to fertilize it
●● What are 'loams', and why is it important for soil to be loamy?
Answer: The most fertile topsoil, it is important because in loams there
is enough space to deliver oxygen to the roots. Made up of sand silt and
clay
●● Why is pH such an important factor for soil quality?
REVIEW SHEET ACCURATE QUESTIONS
AND ANSWERS PREMIUM RESOURCE
●● In the root, plants need to take up more CO2 or O2?
Answer: More O2
●● Is the need for CO2 and O2 in leaves the same when compared to
roots?
Answer: The difference is because of what the plant needs at that certain
spot. The CO2 is needed for photosynthesis to make sugar for the plant
●● If you look at the apoplast and the symplast, which of the following
statements are true?
Answer: In the apoplastic route water and solute move along the
continuum of cell walls and extracellular spaces
●● If you add sugar to water does the water potential increase or
decrease?
Answer: Decrease
●● How is osmosis defined?
Answer: Diffusion of free water
,●● What is a protoplast?
Answer: Living part of the cell which includes plasma membrane
●● How would you define transpiration?
Answer: Loss of water vapor through cells
●● The Casparian Strip is located in the endodermis. What is its
function?
Answer: Blocks passive flow of materials into the root vascular tissue of
the plant
●● What are rhizobia
Answer: They can generate ammonia from atmospheric nitrogen
●● Why are rhizobacteria beneficial for plants?
Answer: They promote growth through chemicals they produce and they
also produce antibodies that protect the roots from disease. Absorb toxic
metals
●● Why are rhizobacteria beneficial for agriculture?
Answer: They can increase crop yield and reduce the amount of fertilizer
and pesticides needed
,●● What is a nodule and what is the reason why they appear sometimes
reddish?
Answer: It is composed of plant cells that have been "infected" by
Rhizobium. They appear reddish because of a molecule named
leghemoglobin, an iron containing protein that binds reversibly to
oxygen. Similar to the hemoglobin in humans red blood cells
●● What does the enzyme 'nitrogenase' catalyze?
Answer: Atmospheric nitrogen to ammonia
●● What is the difference between endo- and ectomycorrhizae?
Answer: Ecto do not penetrate the root cortex, whereas endo grow into
the invaginations of the root cell membranes called arbuscules
●● Do the mycorrhiaze have a symbiotic or mutualistic relationship
Answer: Mutualistic
●● Why have some plants adapted to a carnivorous live style
Answer: They lack some of the minerals so they eat insects. Most of it is
because of poor nitrogen in the soil
●● How many elements have been found in plants, and how many of
these are considered to be 'essential'?
, Answer: 17 and 9 are essential
●● Based on a plant's dry mass, what are the four most common
macronutrients found in plants?
Answer: Carbon, oxygen, hydrogen, nitrogen
●● How can you distinguish a plant that suffers from phosphorus
deficiency versus a nitrogen-deficient plants
Answer: Phosphorus - reddish purple margins
Nitrogen - yellowing of plant at the tip and going towards the center of
plant
●● What is 'humus' and why is it important for the plant?
Answer: The remains of dead organisms and other organic matter. It is
important to the plant to fertilize it
●● What are 'loams', and why is it important for soil to be loamy?
Answer: The most fertile topsoil, it is important because in loams there
is enough space to deliver oxygen to the roots. Made up of sand silt and
clay
●● Why is pH such an important factor for soil quality?
