finally mammals

Question 1

what are some characteristics of phylum chordata

Answer 1

pharyngeal pouch: permeant = water breather
temporary air and land
notochord - cartiligous rod of cells
single dorsal hollow nerve
posterior tail above anus at some point

Question 2

what are some characteristics of class mammalia

Answer 2

endotherms
hair
milkers
3 bones in middle ear(hammer anvil and stirrup)

Question 3

what are the primary divisions of mammalia

Answer 3

prototherioa such as echidna and platypus and other theria animals

Question 4

what are the infra classes of mamallia

Answer 4

metatheria ie marsupials with they dumb ass pouch
eutheria with placental young

Question 5

what are some characteristics of metatheria or marsupials

Answer 5

egg has shell membrane till late in development
babies crawn to pouch where there’s nipples
wombats shit cubes for scent marking on cliffs maybe

Question 6

what are the three most common species

Answer 6

rodentia, chirptera eulipotyhia

Question 7

some kwick rat facts for ya

Answer 7

40% of mammals are rodents
1 pair continously growing incisors
mainly herbivours

Question 8

what are some characteristics of chiroptera

Answer 8

20% mammal species
arms formed wings
mega and micro chiroptera
echolocation
disease vectors

Question 9

what are some characteristics of eulipotyphla

Answer 9

global distribution
sensitive nose
eats insects
burrowers

Question 10

what are some characteristics of perissodactyla

Answer 10

odd toed
horses rhinos

Question 11

what are some characteristics of cetartiodactyla

Answer 11

even toed
cattle camel deer whales

Question 12

what are some characteristics of the sirenia

Answer 12

aquatic slow moving
manatee and dugong
they such happy lil guys
mostly herbivores, sometimes shellfish
teeth replaced front to back
vunerable to human attack :(

Question 13

what are some characteristics of xenartha

Answer 13

sloths anteaters arrmadillos
specialisation of verterbra
anteaterts toothless uses sticky tongue
sloths solitary slow moving herbivores, complex ecosystem on fur

Question 14

what are some characteristics of carnivora

Answer 14

weasels dogs racoons cats bears seals
highly specialised teeth for ripping and tearing
highly diverse habitat

Question 15

what are some characteristics of primates

Answer 15

u, u silly monky c:
wide range of body sizes
strepsirrhini and haplorrini
hapl higher primates

Question 16

what are some characteristics of mammal hair and epidermals things

Answer 16

hair - keratin, insulation and camoflage
mammory glands, prolactin
eccrine glands - general whole body sweat glands
apocrine glands - hair follacles
nails horns other keratinous structures

Question 17

what are dental ratios and whats urs

Answer 17

dental ratios are arrangments of teeth, incisor, canine, premolar, molar
mine is 2 1 2 3 , although my canines are awful retracted
more molars and lower jaw means herbivore

Question 18

what are some marine mammal orders to remember
just the orders will probably do

Answer 18

Order Carnivora
Family Phocidae (‘true’ or earless seals)
Family Otariidae (sea lions & fur seals)
Family Odobenidae (walrus)
Family Mustelidae (weasels) including sea otter
Family Ursidae (bears) including polar bear
Order Cetartiodactyla
sub-order Cetancodonta: toothed whales, dolphins, porpoises
baleen whales
Order Sirenia