Animal Characteristic (8.7) Flashcards
About 800 MYA (in the Pre-Cambrian Era) multicellular animals evolved from the ______ kingdom.
protist
They would have evolved from a group of ____-_______
protists.
multi-cellular
About 360 MYA animals (_____) begin to colonize land.
fish
About 250 MYA Pangaea forms causing mass extinctions of _____ and ________. (Reptiles survive dry climate.)
fish, amphibians
About 180 MYA _______ breaks apart.
Pangaea
About 65 MYA an asteroid collides with Earth causing mass extinction of __________/_________. (Mammals survive)
reptiles/dinosaurs
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)
Multi-cellular heterotrophs by ________
ingestion
Do animals have cell walls?
no
They have _____ and ______ tissue for movement and responding to a changing environment
muscle and nervous
Exhibit ______ dominant life-styles
diploid
They reproduce _________
sexually
Gametes fuse together to make a _______ ________.
diploid zygote
like animals
Parazoa
true animals
Eumetazoa
______ are asymmetrical, have no true tissues, and are non-motile but are heterotrophic
Parazoa
a body plan in which the parts are organized in a circle around an axis
radial symmetry
a condition in which two equal halves of a body mirror each other
bilateral symmetry
two tissues (__________…. no muscle tissue) nerve net
diploblastic
three tissues (__________), nervous system
triploblastic
Three tissues
ectoderm, mesoderm, endoderm
makes skin and nervous tissue
ectoderm
makes muscles, bones, heart
mesoderm
makes the digestive organs/tract, liver, and lungs
endoderm
back/top
dorsal
front/botton
ventral
toward the head
anterior
toward the tail
posterior
the accumulation of senses in the head region of an animal
cephalization
These are “without a cavity” animals (They tend to be very small - diffusion/osmosis is main transport system)
Acoelomates
These are the false cavity animals (The space/cavity is between two different tissues) (The fluid filled space acts as a hydrostatic skeleton)
Pseudocoelomates
These are the true cavity animals (The space is within one tissue - the mesoderm. It is for organ spaces and protection from the digestive tube)
Coelomates
an organism whose embruing blastopore develops into an anus, whereas its mouth develops from a second opening at the opposite end of the archenteron; usually characterized by an embryo that undergoes indeterminate, radial cleavage
deuterostomes
an organism whose embryonic blastopore develops into the mouth whose coelom arises by schizocoely and whose embryo has determinate cleavage
protostomes
____________ are Echinoderms and Chordates (includes humans)
Dueterostomes
__________ are Mollusks, Annelids, and Arthropods
Protostomes
uses our senses to detect environment stimulus and cues as well as control bodily function
nervous system
moving the organism about the environment
muscular/bone system
moving oxygen and nutrients through an organisms whole body
circulatory system
to perform gas exchange with the environment (O2 in, CO2 out)
respiratory system
to breakdown food to the cellular level for providing nutrients to the cells
digestive system
to dispose of liquid nitrogenous waste
excretory system
