Flashcards in Animal Characteristic (8.7) Deck (42)
About 800 MYA (in the Pre-Cambrian Era) multicellular animals evolved from the ______ kingdom.
They would have evolved from a group of ____-_______
About 360 MYA animals (_____) begin to colonize land.
About 250 MYA Pangaea forms causing mass extinctions of _____ and ________. (Reptiles survive dry climate.)
About 180 MYA _______ breaks apart.
About 65 MYA an asteroid collides with Earth causing mass extinction of __________/_________. (Mammals survive)
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 ________
Do animals have cell walls?
They have _____ and ______ tissue for movement and responding to a changing environment
muscle and nervous
Exhibit ______ dominant life-styles
They reproduce _________
Gametes fuse together to make a _______ ________.
______ are asymmetrical, have no true tissues, and are non-motile but are heterotrophic
a body plan in which the parts are organized in a circle around an axis
a condition in which two equal halves of a body mirror each other
two tissues (__________.... no muscle tissue) nerve net
three tissues (__________), nervous system
ectoderm, mesoderm, endoderm
makes skin and nervous tissue
makes muscles, bones, heart
makes the digestive organs/tract, liver, and lungs
toward the head
toward the tail
the accumulation of senses in the head region of an animal