Bio 152 Exam Practice Questions with Correct
Answers
What is the relationship of Plants and CO2?
CO2 is a building block for biological molecules.
CO2 does not create energy, it causes plants to use more.
What is a autotroph?
They are self feeding organisms, they use carbon from simple substances to make organic
molecules.
Algae, plants, and some prokaryotes
What is a heterotroph?
Feed from other organisms, eat carbon to build organic molecules. Usually gets the carbon from
other organic molecules
Animals, Fungi, some prokaryotes, and protists
Where does photosynthesis occur in the plants?
Usually in the leaves, there is limited/no photosynthesis in the stem, roots, and reproductive
cells.
Where are most chloroplasts found?
in the leaf cells, this is due to photosynthesis primarily taking place here.
,What are the two major organ systems in plants?
Roots and Shoots system.
What parts of the plants are part of the shoots system?
The stem, reproductive organs, and leafs
What part of the plant comprise the roots system?
The roots
What are the characteristics of the cuticle?
Help prevent water loss in the plant due to thick waxy layer that it is made up by.
This is waterproof so water does not soak into it.
What are the characteristics of the epidermis?
flat cells that make up the cuticle and prevent water loss inside of the plant.
What are the characteristics of the mesophyll?
This is the part of the plant cell that is between the top and bottom epidermis, It is loaded with
chloroplast
Mesophyll has the main job of photosynthesis
What is the palisade mesophyll and what is its function?
the palisade mesophyll is the upper mesophyll, nearest to light, it is packed with chloroplast
because that is its main function.
, What is the spongy mesophyll and what is its function?
the spongy mesophyll is the bottom part of the mesophyll, it is beneath the palisade and is made
up of a sponge like shape, has holes throughout it to allow for air circulation in the plant.
Allows CO2 in and O2 out.
What are the functions and characteristics of the stoma?
it is a hole that allows air in and out, it regulates gas exchange.
Has guard cells, this regulates the amount of time the stoma is open and when it needs to be
closed.
If the plant is doing photosynthesis or if it is light out, the stoma is open
If the plant is not doing photosynthesis or it is dark out the stoma is closed.
What is vascular tissue and what are its functions?
vascular tissue is thought of like veins in human anatomy, they are mainly used for transport
throughout the plant. They do not deal with photosynthesis.
They are located in the leaf, stem, and the root.
What gradient is larger in plant systems, the CO2 gradient or the H2O gradient?
The H2O gradient is much larger and that is why many H2O molecules are lost for ever CO2
molecule gained.
Answers
What is the relationship of Plants and CO2?
CO2 is a building block for biological molecules.
CO2 does not create energy, it causes plants to use more.
What is a autotroph?
They are self feeding organisms, they use carbon from simple substances to make organic
molecules.
Algae, plants, and some prokaryotes
What is a heterotroph?
Feed from other organisms, eat carbon to build organic molecules. Usually gets the carbon from
other organic molecules
Animals, Fungi, some prokaryotes, and protists
Where does photosynthesis occur in the plants?
Usually in the leaves, there is limited/no photosynthesis in the stem, roots, and reproductive
cells.
Where are most chloroplasts found?
in the leaf cells, this is due to photosynthesis primarily taking place here.
,What are the two major organ systems in plants?
Roots and Shoots system.
What parts of the plants are part of the shoots system?
The stem, reproductive organs, and leafs
What part of the plant comprise the roots system?
The roots
What are the characteristics of the cuticle?
Help prevent water loss in the plant due to thick waxy layer that it is made up by.
This is waterproof so water does not soak into it.
What are the characteristics of the epidermis?
flat cells that make up the cuticle and prevent water loss inside of the plant.
What are the characteristics of the mesophyll?
This is the part of the plant cell that is between the top and bottom epidermis, It is loaded with
chloroplast
Mesophyll has the main job of photosynthesis
What is the palisade mesophyll and what is its function?
the palisade mesophyll is the upper mesophyll, nearest to light, it is packed with chloroplast
because that is its main function.
, What is the spongy mesophyll and what is its function?
the spongy mesophyll is the bottom part of the mesophyll, it is beneath the palisade and is made
up of a sponge like shape, has holes throughout it to allow for air circulation in the plant.
Allows CO2 in and O2 out.
What are the functions and characteristics of the stoma?
it is a hole that allows air in and out, it regulates gas exchange.
Has guard cells, this regulates the amount of time the stoma is open and when it needs to be
closed.
If the plant is doing photosynthesis or if it is light out, the stoma is open
If the plant is not doing photosynthesis or it is dark out the stoma is closed.
What is vascular tissue and what are its functions?
vascular tissue is thought of like veins in human anatomy, they are mainly used for transport
throughout the plant. They do not deal with photosynthesis.
They are located in the leaf, stem, and the root.
What gradient is larger in plant systems, the CO2 gradient or the H2O gradient?
The H2O gradient is much larger and that is why many H2O molecules are lost for ever CO2
molecule gained.
