BIO 1002 Exam 3 Pomarico LSU Latest (2026/27)
Questions and Answers A+ Graded
Examples of increased complexity and organization
germ layers
cellular specialization
body plan
cephalization
body cavity
segmentation
digestive system
Cephalization
Concentration of nervous tissue into a defined region of the body (brain in head)
Segmentation
Body design in which similar repeating units are present
What does cellular specialization lead to
,Development of tissues which combine into an organ, organs combine into organ
systems
Tissues
specialized cells with a common structure and function that are grouped together
Organs
centers of bodily functions which are usually made up of different tissues
Organ system
groups of two or more organs that function together to perform a common task
What are the different internal systems?
circulatory
digestive
respiratory
excretory
nervous
reproductive
,support
What defines the first separation of a group from the rest of the animals?
Presence or absence of tissues
What are the general characteristics of sponges?
Sessile - nonmoving
Filter feeders
Can reproduce sexually or asexually
Asymmetric body plan designed for water filtration
Lack tissue structure
Have specialized cells
What are the two ways sponges reproduce asexually?
Budding and fragmentation
What are the three types of specialized sponge cells?
Epithelial, Collar, and Ameboid
, Epithelial cells
Outer covering layer
Make up and regulate the pores
Collar cells
Inner layer which pumps water through the sponge using flagella and filters out
the blood
Ameboid cells
mobile cells between the two layers that ingest the collected food; secrete glass-
like structures known as spicules
What are the two types of symmetry?
Radial and bilateral
Radial symmetry
round body plan
animals have a top and bottom, but not back, front, left, or right
Questions and Answers A+ Graded
Examples of increased complexity and organization
germ layers
cellular specialization
body plan
cephalization
body cavity
segmentation
digestive system
Cephalization
Concentration of nervous tissue into a defined region of the body (brain in head)
Segmentation
Body design in which similar repeating units are present
What does cellular specialization lead to
,Development of tissues which combine into an organ, organs combine into organ
systems
Tissues
specialized cells with a common structure and function that are grouped together
Organs
centers of bodily functions which are usually made up of different tissues
Organ system
groups of two or more organs that function together to perform a common task
What are the different internal systems?
circulatory
digestive
respiratory
excretory
nervous
reproductive
,support
What defines the first separation of a group from the rest of the animals?
Presence or absence of tissues
What are the general characteristics of sponges?
Sessile - nonmoving
Filter feeders
Can reproduce sexually or asexually
Asymmetric body plan designed for water filtration
Lack tissue structure
Have specialized cells
What are the two ways sponges reproduce asexually?
Budding and fragmentation
What are the three types of specialized sponge cells?
Epithelial, Collar, and Ameboid
, Epithelial cells
Outer covering layer
Make up and regulate the pores
Collar cells
Inner layer which pumps water through the sponge using flagella and filters out
the blood
Ameboid cells
mobile cells between the two layers that ingest the collected food; secrete glass-
like structures known as spicules
What are the two types of symmetry?
Radial and bilateral
Radial symmetry
round body plan
animals have a top and bottom, but not back, front, left, or right
