name 2 characteristics of reptiles
- amnoitic egg
- toes with claws
what is ectothermic metabolism?how do reptiles adjust to this metabolism?
it is when the metabolism is too slow to make ennough heat for the body. they lie in the sun to absorb heat
name 2 characteristics that allowed reptiles to become free of water
- eggs with shells
- scales to hold moisture
what feature of lizards and snakes make them successful predators?
their lower jaw can stretch and move in many directions
how are birds similar to crocidiles?
both have scales on feet and lay amniotic eggs
2 characteristics of modern birds
- strong lightweight skeleton
- endothermic metabolism
what are 2 main functions of bird feathers
most adult echinoderms have what kind of symetry?
5 part radial symetry
Deuterostomes include all of the following except which?
Sea lilies and feather stars differ from other echinoderms because their mouth
A) is located on the upper surface
a sea stars tube feet attach to surface by means of
tunicates and lancelets are similar in that both
C) are invertibrate chordates
what type of charateristics showed us that early birds were similar to reptiles?
- claws on wingss
- teeth on beak
- reptilian tail
- no breastbone
what is the product of double fertilization
monotremes and marsupials have limited geographical distributions beacause of
to live on land sucessfully plant sneeded to :
- absorb neutrients from surroundings
- prevent bodies from drying out
- reproduce without water to move sperm
plants are complex multicellular organisms that are primarily terrestrial autotrophs
plants are complicated multicellular things that are land living......
1 seed part
petals in 3s
paralle leaf veins
2 seed parts
petals in 2,4,5
branching leaf veins
3 seed parts
- plant embryo: new sporophyte
- seed coat: protects embryo
- endosperm: nutritiuos tisse (food)
soft shell, flippers, carnivourus
land living, domeshell, feet, vegitarians
water/land, hardshell, feet
toes with claws for climbing
dry scaly skin
well developed lungs
3/4 chambered heArt
4 types of teeth
- incisors: biting and cutting (front teeth)
- canines: Stabbing And holding
- premolars: crush and grind
- molars: ""
2 pairs of jointed appendages
complex organ systems
adaptions of vertebrates
Lampreys vs. hagfish
parasite, freshwater vs. scavengers, marine
anterior dorsal fin
upright, protection, spines
pectoral and pelvic fin
steering and balance
posterior dorsal fin
upright and balance
2 pr legs per segment
1 pr legs per segment
3 part body plan of mollusks
- internal shell
- no shell
- external shell
2 main characteristics of sponge
- filled with holes,pores
characteristics of mammals
level of organization from smallest to largest
why doesnt a flatworm have a respitory or circulatory system?
because cells are so closse to exterior-- absorb air thru skin
do tapeworms have a digestive system?y?
their hosts digest it
what do arthropods share with annelids ?
- true ceolom
- segmented body
how is arthropod's exoskeleton grown?
it must be shed+ regrown to increase size
distinct head with eyes
open circulatory system
general characteristics of Artropods
not all spiders spin webs but all spiders make silk which may be used to capture prey