full length exam 5 terms Flashcards
parallel evolution
animals from different classes evolving to resemble each other physically
convergent evolution
descendants of a similar species that face similar environments developing similar adaptations
adaptive radiation
a number of different lineages emerging from a single acestral species
coevolution
species with an antagonist relationship evolving adaptations at similar rates counter to each other
describe annelids
have one way digestive tracts
what is tetanus
constant contraction of muscle
absolute refractory period
resetting of sodium channels
what are cambium
actively dividing, undifferentiated cells that give rise to phloem and xylem
what does the xylem do
carries water and nutrients up a plant
what does the phloem do
carries nutrients down the plant
what are root hairs
specialized cells of the root that increases surface area for absorption of water and minerals from the soil
what are mesenchyme
patches of mesodermal tissue that has migrated from its original position in the gastrula such as that which give rise to the muscle, dermis, gonad, and skeletal muscle tissue
what is the littoral zone
region of the continental shelf
what do algae need to survive
light
what is a deleterious mutation
one that causes damage
