BIO 152 TOPICS 23-24 FINAL EXAM
WITH CORRECT ANSWERS 2025
Autotrophs correct answers >> self-feeding; they are
organisms that use carbon from simple substances to make
organic compounds; they are usually photosynthetic, but they
don't have to be (chemotrophs); ex: algae, plants, some
prokaryotes
Heterotrophs correct answers >> other-feeding; they are
organisms that use carbon from other organic sources to make
organic compounds; they usually also get energy from organic
compounds; ex: animals, fungi, humans, some prokaryotes and
protists
Photosynthesis occurs... correct answers >> in certain
organelles in specialized cells in the plant
Shoot system correct answers >> consists of reproductive
organs, leaves and stem
Root system correct answers >> consists of roots
Cuticle correct answers >> non-cellular protective layer of
the leaf that is waterproof; prevents air from getting in or out
Epidermis correct answers >> cells that make the cuticle and
protect the leaf
, Mesophyll correct answers >> consist of the palisade
mesophyll and the spongy mesophyll; help with the
photosynthesis process in the leaf
Stoma correct answers >> located at the bottom of the
plant; have holes that allow air in and out; contain guard cells
Vascular tissue correct answers >> found in the leaf, stem
and root; they are usually non-photosynthetic and specialize in
transport
Why is the arrangement of the mesophyll the way that it is?
correct answers >> it maximizes the amount of light and
circulates CO2 in the leaf
CO2 and transpiration correct answers >> -mesophyll cells
near the upper surface of the leaf have columnar arrangement
that maximizes light interception
-mesophyll cells close to the stomata have a honeycomb-like
arrangement to allow CO2 to spread easily throughout the leaf
-the concentration difference driving the diffusion of CO2 into the
leaf is typically 100 times smaller than the concentration
difference driving the diffusion of water vapor out of the leaf
Plants lose several hundred H2O molecules for each CO2 that is
fixed by photosynthesis because: correct answers >> the
concentration gradient is many times larger for H2O than for CO2
WITH CORRECT ANSWERS 2025
Autotrophs correct answers >> self-feeding; they are
organisms that use carbon from simple substances to make
organic compounds; they are usually photosynthetic, but they
don't have to be (chemotrophs); ex: algae, plants, some
prokaryotes
Heterotrophs correct answers >> other-feeding; they are
organisms that use carbon from other organic sources to make
organic compounds; they usually also get energy from organic
compounds; ex: animals, fungi, humans, some prokaryotes and
protists
Photosynthesis occurs... correct answers >> in certain
organelles in specialized cells in the plant
Shoot system correct answers >> consists of reproductive
organs, leaves and stem
Root system correct answers >> consists of roots
Cuticle correct answers >> non-cellular protective layer of
the leaf that is waterproof; prevents air from getting in or out
Epidermis correct answers >> cells that make the cuticle and
protect the leaf
, Mesophyll correct answers >> consist of the palisade
mesophyll and the spongy mesophyll; help with the
photosynthesis process in the leaf
Stoma correct answers >> located at the bottom of the
plant; have holes that allow air in and out; contain guard cells
Vascular tissue correct answers >> found in the leaf, stem
and root; they are usually non-photosynthetic and specialize in
transport
Why is the arrangement of the mesophyll the way that it is?
correct answers >> it maximizes the amount of light and
circulates CO2 in the leaf
CO2 and transpiration correct answers >> -mesophyll cells
near the upper surface of the leaf have columnar arrangement
that maximizes light interception
-mesophyll cells close to the stomata have a honeycomb-like
arrangement to allow CO2 to spread easily throughout the leaf
-the concentration difference driving the diffusion of CO2 into the
leaf is typically 100 times smaller than the concentration
difference driving the diffusion of water vapor out of the leaf
Plants lose several hundred H2O molecules for each CO2 that is
fixed by photosynthesis because: correct answers >> the
concentration gradient is many times larger for H2O than for CO2
