Bio Exam 4 Class 3 (Deuterostomes) Flashcards

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1
Q

all deuterstomes are also

A

bilateral triploblasts

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2
Q

deuterstomes are not as … as protostomes

A

neumerous

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3
Q

what forms first for deuterostomes

A

anus first

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4
Q

what are the two main groups of deuterstomes

A

echinodermata and chordata

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5
Q

what do echino derms include?

A

marine invertabrates (sea urchins. sea stars, sea cucumbers)

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6
Q

what are the 4 synapomorphies of echinoderms?

A
  1. pentaridal symmetry
  2. endoskeleton
  3. water vascular system
  4. tube feet
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7
Q

ehinoderm larva are… symmetrical.. adults are

A

bilateral,, pentaradial

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8
Q

some echinoderms have evolved an

A

exoskeleton

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9
Q

what does the water vascular system do for echinodems>

A

hydrostati skeleton

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10
Q

what do tube feet do>

A

help with movement and predation

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11
Q

what and how do echinoderms feed.

A

algae and prey on animals
- suspension feed or eat detritus

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12
Q

what are some of the ecosystem impacts of echinodermata>

A

ex. kelp forests
- sea urchins eat kelp
- otters eat urchins
- sea urchins then boomed everywhere which then deforested the kelp
- this leading of less o2 and carbon sequestration

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13
Q

what are chordates?

A

include two sub groups plus verbrates

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14
Q

what are the 3 froupd of chordates

A

cephalochordates
urochordates
vertebrates

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15
Q

what are the 4 synapomorphies of chordates

A
  • pharyngeal gill slits
  • dorsal hollow nerve chord
  • notochord
  • post anal tail
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16
Q

what are vertabrates?

A

a subgroup of chordates that share two additional synapomorphies

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17
Q

what are the 2 additional synapomorphies of vertabrates?

A

vertebrae
cranium

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18
Q

what is the vertabrae?

A

bony or cartilaginous structural support column

19
Q

what is the cranium?

A

bony or cart. fibrous case that encloses the brain

20
Q

where did the craium first evolve from?

A

the boney exoskeleton

21
Q

the first vertabrae are

A

cartilagenous

22
Q

what morphological innovation did the vertabrates develop to live on land

A

jawws
bony endoskel
limbs- tetrapod
amniotic eggs

23
Q

jaws gradually evolved from

A

pharyngeal gill arches

24
Q

jaws allowd…

A

ray finned fishes and tetrapods to capture food

25
Q

fish are not

A

monophyletic

26
Q

approximately half of all vertabrate species are… and the other half are…

A

ray finned fishes and tetrapods

27
Q

fossil evidence suggests that fins evolved into

A

limbs

28
Q

what do limbs allow for

A

movement on land

29
Q

what does the amniotic eggs help with

A

protects embryos from dessication

30
Q

amniotes are split into two groups

A

mammals and reptiles

31
Q

the amniotic egg is different between reptiles and mammals in that

A

the reptiles have a shell and in mammals they have a placenta

32
Q

what mammals lay eggs

A

platypi and echidnas

33
Q

what are the advantages and disadvantages to parental care

A

advantages:
- better survival for offspring
Disadvantages:
- lactation is a lot of enerygy
- moms will fight to the death for her offspring
- have to find food for their young

34
Q

what is an r selected species

A

individuals with high mortality
- many babies at once
- low parental care
ex.) mice and rabbits

35
Q

what are k selecte dspecies

A
  • lower mortality rate
  • high parental care
  • only a few babies at once
36
Q

look at the surviroship curve for word map

A

hehe

37
Q

examples of r selected

A

cockroach dandelion

38
Q

examples of k selected

A

elephant and saguaro cactus

39
Q

what was the importance of feather evolution

A

-insulation
- display
- flight facilitation

40
Q

what are primates>

A

mammals that include moneys, apes and humans

41
Q

what are the 2 groups of primates>

A
  • prosimians (arboreal, small, nocturnal)
  • anthropoids (human like)
42
Q

what are hominidae?

A

himinids are a subgroup of mammals including gorillas chips humans etc.

43
Q

what are 3 sunapomorphies of hominids>

A

1 large brians
2 hand and feet
3 parental care

44
Q

what is bipedalism?

A

found only in hominids