vocab Unit 2 Flashcards
bilateral symmetry
divided only by one plane
budding
polyp produces mini versions of itself that drop off and assume an independent existence.
cephalization
concentration of sensory organs and a brain in a defined head region.
closed circulatory system
blood stays confined in the heart and blood vessels
coelom
body cavity
compound eye
multiple light detectors, acute chemical and tactile senses
deuterostome
outgrowth of the digestive cavity from the coelom
ectoderm
give rise to the tissues that cover the outside of the body
endoskeleton
internal skeleton composed of calcium carbonate
exoskeleton
external skeleton that encloses the arthropod body like suit of armor
ganglion
faltworm cluster of nerve cells
hemocoel
blood cavity
hermaphroditic
they posses both male and female sexual organs
hydrostatic skeleton
framework against which muscles can act
invertebrate
those lacking backbone
larva
insects immature phase
mesoderm
third germ layer
metamorphosis
radical change from juvenile body to adult body form
molt
shed exoskeleton
parasite
organism that lives in or on the body of another organism
protosome
formation of the coelom between the body wall and digestive cavity
pseudocoelom
body cavity not completely surrounded by mesoderm-derived tissue
pupa
non eating phase where afterwords the insect becomes an adult
radial symmetry
divide in many planes
segmentation
ringlike depressions externally identical copies of nerves internally
tissue
group of similar cells intergrated into a functional unit
vertebrate
embryonic notochord is replaced during development by a backbone
alteration of generation
plant reproduction life cycle
angiosperm
flwoering seed plants
antheridium
reproductive structures where sperm are formed
archegonium
reproductive structures where eggs are formed
conifer
evergreen plants
photosynthesis year round
antifreeze sap
cuticle
waxy cover on leaves
flower
structures that have both male and female gametes
fruit
swollen ovary
seed
embryonic dipolid (sporophyte)
gametophyte
haploid cells
lignin
stiffening substance in plants
nonvascular plant
bryophytes
no true roots - they have rhizoids
no transfer cells
ovule
unfertilized seeds at the base of a flower
pollen
male haploid cell (gametophyte)
sporophyte
dipolid cells
stoma
pores in leaves
vascular plant
tracheophytes
have true roots, leaves, stem
transfer cells
gymnosperm
nonflowering seed plants
vertebrates
those with backbone
nerve cords
conduct nervous signals to and from the ganglia
endoderm
give rise to the tissue that line the gut cavity