Adaptions/
Selection
Selection
Definition of adaption
A trait that enhances fitness, relative to alternative traits in the population, that has arisen via natural selection.
heirarchy of organization in organisms
cells
tissue
organ
organ system
organism
squamous, cuboidal, columnar
function of muscle tissue
to contract
connective tissue is made up of
nonliving material and fibers
only reason a specific trait is picked?
conveys higher fitness than other current traits
Three types of body symmetry and examples from each category
asymmetrical - sponges
Radial- cnidarians and ctenophores
Bilateral- most animals, at least in their larvae stage
types of epithelial tissue
simple and stratified
types of muscle tissue
skeletal
smooth
cardiac
three fiber types in connective tissue
collagen
elastic
reticular
Three types of selective pressures?
directional
stabalizing
diversifying
Two types of tissue development and which one can a body cavity
diploblast
triploblast (can form body cavity)
what are the three layers of the skin?
what is the first and last layer made of
epidermis - epithelial (squamos stratified) tissue
basement membrane
dermis - connective tissue
nervous tissue function
send and recieve signals
what do fibroblasts do?
produce fibers
develop tissues and heal wounds
does a sister group or an out group have a more common ancestor in a phylogentic tree?
sister group
protosome: spiral and determinate
deuterostome: radial and indeterminate
functions of a simple one layer epithelial tissue
can exchange material
easy to pass material through
Types of cells in nervous tissue
neurons and glial cells
what do elastic fibers do?
stretch and recoil, made of protein called elastin
draw a simple phylogentic tree that includes a
Node
Branch
sister group and out group
......
Relationships between groups of animals determined by examining VARIATIONS in what 5 things
•Body symmetry
•Level of tissue development
•Types of body cavities
•Patterns of development
•Molecular data
functions of columnar epithelial tissue
produce mucus
reduce friction
Characteristics of skeletal muscle tissue
voluntary control
muscle attached to bone
long, cylindrical, striated cells
multinucleated
6 types of connective tissue
loose connective tissue
fibrous connective tissue
adipose tissue
cartilage
bone
blood