Flashcards in Animal Characteristic (8.7) Deck (42)
Loading flashcards...
1
About 800 MYA (in the Pre-Cambrian Era) multicellular animals evolved from the ______ kingdom.
protist
2
They would have evolved from a group of ____-_______
protists.
multi-cellular
3
About 360 MYA animals (_____) begin to colonize land.
fish
4
About 250 MYA Pangaea forms causing mass extinctions of _____ and ________. (Reptiles survive dry climate.)
fish, amphibians
5
About 180 MYA _______ breaks apart.
Pangaea
6
About 65 MYA an asteroid collides with Earth causing mass extinction of __________/_________. (Mammals survive)
reptiles/dinosaurs
7
Animals traits
Multi-cellular heterotrophs by ingestion
Have no cell walls
Most have muscle and nervous tissue for movement and responding to a changing environment
Exhibit diploid dominant life-styles
(Reproduce sexually using flagellated sperms and non motile eggs that are haploid. Gametes fuse together to make diploid zygote. The zygote will continue to grow, by mitosis, and develop into the organism)
8
Multi-cellular heterotrophs by ________
ingestion
9
Do animals have cell walls?
no
10
They have _____ and ______ tissue for movement and responding to a changing environment
muscle and nervous
11
Exhibit ______ dominant life-styles
diploid
12
They reproduce _________
sexually
13
Gametes fuse together to make a _______ ________.
diploid zygote
14
like animals
Parazoa
15
true animals
Eumetazoa
16
______ are asymmetrical, have no true tissues, and are non-motile but are heterotrophic
Parazoa
17
a body plan in which the parts are organized in a circle around an axis
radial symmetry
18
a condition in which two equal halves of a body mirror each other
bilateral symmetry
19
two tissues (__________.... no muscle tissue) nerve net
diploblastic
20
three tissues (__________), nervous system
triploblastic
21
Three tissues
ectoderm, mesoderm, endoderm
22
makes skin and nervous tissue
ectoderm
23
makes muscles, bones, heart
mesoderm
24
makes the digestive organs/tract, liver, and lungs
endoderm
25
back/top
dorsal
26
front/botton
ventral
27
toward the head
anterior
28
toward the tail
posterior
29
the accumulation of senses in the head region of an animal
cephalization
30
