Question

define diphyodont teeth?​

Answer 1

Answer:

$\pink{ \mathfrak{HELLO \: DUDE..! }}$

Explanation:

• Diphyondont Teeth

two sets of teeth throughout life, baby set replaced by adult set

Mammalian characteristics

hair, external ears, integumentary system, scent glands, sebbaceous (oil), mammilary, sweat glands, secondary mouth plate (bony&soft), diaphragm

• mammal evolution

synapsid line (one pair of openings in skull)

pelycosaurs

therapsids

cynodonts

• pelycosaurs

first synapsids, large lizard like, sprawled legs, ectothermic, sails, starting specialized teeth

• Therapsids

more upright posture, bigger brain, herb/carnavore, canines molars and incisors

cynodonts

last synapsid to evolve, some had hair, maybe endothermic, secondary plate, diaphragm

true mammals

small rodent like, endo, hair, egg layers, mam glands

• monotreme characteristics

most primitive mammal alive, ONLY egg laying mammal (oviparous), duck bill platypus, 2 species echidna,

echidna

ant eater thing, catches insects w tongue, spiny, one baby at time, placed in pouch

platypus

aquatic, eat invertebrates, bills detect electrical impulses,

• marsupial

viviparous (live bearing), mostly in australia, short gestation but long nursing period

marsupial parental care

yolk sac embryo, very tiny, strong forelimbs, use to crawl into pouch

• eutherians

most living mammals, long gestation bc of placenta, usually larger mamml=longer gestation

insectavores

oldest group, shrews, moles, hedgehogs.

long snout, small brain, high energy

• Chiroptera

bats, second largest group, only flying mammal, nocturnal, eat fruit blood insects, echolocation...

$\huge{\red{ \bf{Hope \: it \: helps \: !!! }}}$

Answer 2

Answer:

A diphyodont is any animal with two successive sets of teeth, initially the "deciduous" set and consecutively the "permanent" set. Most mammals are diphyodonts—as to chew their food they need a strong, durable and complete set of teeth. Diphyodonts contrast with polyphyodonts, whose teeth are constantly replaced