WSU BIO 106 FINAL EXAMS SET VERIFIED
QUESTIONS AND ACCURATE ANSWERS
COMPLETE PREPARATION FILE
●● Dependent variable
Answer: Value depends on another factor
●● Controlled variable
Answer: Kept the same throughout the experiment
●● What are the two key tissues that allow plants to transport water or
organic nutrients, respectively, over long distances?
Answer: Xylem - water and minerals from roots to shoots
Phloem - transports sugars from photosynthesis to where they are
needed
●● 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
,●● Why do you think there is/is not a difference in gas exchange when
you compare roots with leaves?
Answer:
●● 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
QUESTIONS AND ACCURATE ANSWERS
COMPLETE PREPARATION FILE
●● Dependent variable
Answer: Value depends on another factor
●● Controlled variable
Answer: Kept the same throughout the experiment
●● What are the two key tissues that allow plants to transport water or
organic nutrients, respectively, over long distances?
Answer: Xylem - water and minerals from roots to shoots
Phloem - transports sugars from photosynthesis to where they are
needed
●● 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
,●● Why do you think there is/is not a difference in gas exchange when
you compare roots with leaves?
Answer:
●● 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
