Chapter 1 Flashcards
tail that is symmetrical
homocercal
upper lobe of tail is bigger than the lower lobe
heterocercal
the discipline that relates a structure to its function
functional morphology
natural mechanism for determining which animals would survive and which would not
natural selection
scientists replace the terms lower and higher with
primitive and derived
a kind of biological blue print, a supposed underlying plan upon which an organism was built.
archetypes
embraces the study of form and function, of how a structure and its function become an integrated part of an interconnected design, and of how this design itself becomes a factor in the evolution of new forms
morphology
two or more features that share a common ancestry
homology
two or more features that have similar function
analogy
two or more features that simply look alike
homoplasy
similarity between successively repeated parts in the same organism
serial homology
refers to a body that is laid out equally from a central axis
radial symmetry
the body is divided into to symmetrical sides
bilateral symmetry
the plane that divides the bilateral symmetry of an organism
midsagittal plane
head
anterior
tail
posterior
back
dorsal
front or belly
ventral
midline of the body
medial
sides of body
lateral
farthest away from main part of body
distal
closet to main part of body
proximal
chest
pectoral region
refers to hips supporting hind limbs
pelvic region
divides a bilateral body into dorsal and ventral sections
frontal plane or cononal plane