BIOL385 MAMMALS EXAM QUESTIONS AND ANSWERS
WITH COMPLETE SOLUTIONS GRADED A++
how many temporal fenestrae do mammals have
what is this in the majority of mammals
one (synapsids)
high modified
what are mammals considered in the fossil record
the earliest amniotes
when did mammals come around
in the carboniferous
what are mammals in terms of terrestrial lineages
the most diverse
when did mammals suffer greatly
suffered greatly
with the evolution of dinosaurs, mammals...
sputtered through the age of reptiles (became uncommon)
why do we have good records based on mammals
because they have really good teeth
what provide insulation
,fur (all have fur at some point in their life)
what is uniquely derived in the skull in mammals
articulation between lower jaw and cranium
what are the most diverse group of mammals and how many are there
rodents
~ 3,000
how many species of mammals are there
6,000
what types of mammals are there
marsupials, egg-laying mammals, water mammals
how many species are there of Pyrenean Desman
what do they eat and what tribe are they from
two
insectivores of the tribe Desmanini
what were one of the very first groups to branch off of amniotes
the synapsids
what were the rest of the groups to branch off of the amniotes
sauropsids
what evolved from the sauropsids
diapsids
when was the first fossil of synapsids from
, the carboniferous
huge diversity of synapsids are:
no longer alive
where did most of the diverisyt of synapsids go
many disappeared during Triassic and jurassic because of the dinos
when did the mammalian explosion happen
after the cretaceous
do temporal fenestrae still occur in modern mammals
yes, but it is highly modifies (cheek bone in humans)
what are the three bones surrounding the cheek bone hole
jugal bone, post orbital bone, and squamosal
what did the dentary bone make up in very early synapsids
dentary bone made up only part of the lower jaw: also a coronoid, articular, and angular
bone
what happens to the dentary bone in mammals
the dentary takes over and becomes the sole element/bone in the lower jaw
what matters in terms of defining mammals
the dentary taking over
how many places does connection at the occipital condyle of the vertebral
column happen in mammals?
what does this do?
WITH COMPLETE SOLUTIONS GRADED A++
how many temporal fenestrae do mammals have
what is this in the majority of mammals
one (synapsids)
high modified
what are mammals considered in the fossil record
the earliest amniotes
when did mammals come around
in the carboniferous
what are mammals in terms of terrestrial lineages
the most diverse
when did mammals suffer greatly
suffered greatly
with the evolution of dinosaurs, mammals...
sputtered through the age of reptiles (became uncommon)
why do we have good records based on mammals
because they have really good teeth
what provide insulation
,fur (all have fur at some point in their life)
what is uniquely derived in the skull in mammals
articulation between lower jaw and cranium
what are the most diverse group of mammals and how many are there
rodents
~ 3,000
how many species of mammals are there
6,000
what types of mammals are there
marsupials, egg-laying mammals, water mammals
how many species are there of Pyrenean Desman
what do they eat and what tribe are they from
two
insectivores of the tribe Desmanini
what were one of the very first groups to branch off of amniotes
the synapsids
what were the rest of the groups to branch off of the amniotes
sauropsids
what evolved from the sauropsids
diapsids
when was the first fossil of synapsids from
, the carboniferous
huge diversity of synapsids are:
no longer alive
where did most of the diverisyt of synapsids go
many disappeared during Triassic and jurassic because of the dinos
when did the mammalian explosion happen
after the cretaceous
do temporal fenestrae still occur in modern mammals
yes, but it is highly modifies (cheek bone in humans)
what are the three bones surrounding the cheek bone hole
jugal bone, post orbital bone, and squamosal
what did the dentary bone make up in very early synapsids
dentary bone made up only part of the lower jaw: also a coronoid, articular, and angular
bone
what happens to the dentary bone in mammals
the dentary takes over and becomes the sole element/bone in the lower jaw
what matters in terms of defining mammals
the dentary taking over
how many places does connection at the occipital condyle of the vertebral
column happen in mammals?
what does this do?
