age 1 of 20
BIO 227 EXAM 1 2025/2026 || QUESTIONS WITH
CORRECT DETAILED ANSWERS || 100%
GUARANTEED PASS <LATEST UPDATE>
Planarians .......Answer.........Class Turbellaria. Contain eyespots
used to detect intensity of light along with auricles on the sides
of the head used to touch and detect molecules as a form of
smell. Eat through a lumen that leads to a pharynx, lead to an
excretory system with flame cells and nephridiopores.
Reproduce through pinching off their bodies or penis fencing
Flukes .......Answer.........Class Trematoda. Contain an oral sucker
to attach to hosts intestinal lining and suck nutrients straight from
the hosts blood stream. Outer skin layer is called the glycocalyx,
and it is what transports the nutrients from the blood stream.
Monoecious and lay eggs into host fecal matter containing
,age 2 of 20
miracidium. Snails eat the miracidium, flukes develop, leave
snail, and encyst in a fish, waiting to be eaten
Tapeworms .......Answer.........Class Cestoidea. Attached to a host
digestive tract with hooks at the head known as a scolex.
Contains no digestive tract, as each segment of a tapeworm,
known as a proglottid, feeds and reproduces for itself, simply
sucks nutrients straight through its body membrane. The
proglottids are monoecious and fertilize eachother, creating
genetic diversity
Phylum Nemertea .......Answer.........Ribbon worms. Triploblastic
acoelomates and the first with a closed circulatory system.
Closed circulatory system .......Answer.........A bloodstream
containing capillaries, which allow things to enter and exit the
bloodstream almost the whole way through
, age 3 of 20
Open circulatory system .......Answer.........A bloodstream where
all blood pools in a blood sinus at some points, and things are
able to enter and exit the bloodstream in the blood sinus
Phylum Rotifera .......Answer.........Rotifers. Contain a ciliated rim
around the mouth called a corona, funneling a current into the
mouth, which leads to a mastax, a grinding organ that crushes
food. Food then enters the stomach and leaves through the anus
Parthenogenesis .......Answer.........A method of asexual
reproduction seen in rotifers and lizards in which females
develop eggs that only hatch into more females, until genetic
diversity is needed, in which case an unfertilized egg, if left
untouched, can develop into a fertilized male egg that produces
a male
BIO 227 EXAM 1 2025/2026 || QUESTIONS WITH
CORRECT DETAILED ANSWERS || 100%
GUARANTEED PASS <LATEST UPDATE>
Planarians .......Answer.........Class Turbellaria. Contain eyespots
used to detect intensity of light along with auricles on the sides
of the head used to touch and detect molecules as a form of
smell. Eat through a lumen that leads to a pharynx, lead to an
excretory system with flame cells and nephridiopores.
Reproduce through pinching off their bodies or penis fencing
Flukes .......Answer.........Class Trematoda. Contain an oral sucker
to attach to hosts intestinal lining and suck nutrients straight from
the hosts blood stream. Outer skin layer is called the glycocalyx,
and it is what transports the nutrients from the blood stream.
Monoecious and lay eggs into host fecal matter containing
,age 2 of 20
miracidium. Snails eat the miracidium, flukes develop, leave
snail, and encyst in a fish, waiting to be eaten
Tapeworms .......Answer.........Class Cestoidea. Attached to a host
digestive tract with hooks at the head known as a scolex.
Contains no digestive tract, as each segment of a tapeworm,
known as a proglottid, feeds and reproduces for itself, simply
sucks nutrients straight through its body membrane. The
proglottids are monoecious and fertilize eachother, creating
genetic diversity
Phylum Nemertea .......Answer.........Ribbon worms. Triploblastic
acoelomates and the first with a closed circulatory system.
Closed circulatory system .......Answer.........A bloodstream
containing capillaries, which allow things to enter and exit the
bloodstream almost the whole way through
, age 3 of 20
Open circulatory system .......Answer.........A bloodstream where
all blood pools in a blood sinus at some points, and things are
able to enter and exit the bloodstream in the blood sinus
Phylum Rotifera .......Answer.........Rotifers. Contain a ciliated rim
around the mouth called a corona, funneling a current into the
mouth, which leads to a mastax, a grinding organ that crushes
food. Food then enters the stomach and leaves through the anus
Parthenogenesis .......Answer.........A method of asexual
reproduction seen in rotifers and lizards in which females
develop eggs that only hatch into more females, until genetic
diversity is needed, in which case an unfertilized egg, if left
untouched, can develop into a fertilized male egg that produces
a male
