Biology- Ch. 32 Flashcards
What are the four characteristics all animals have in common?
Multicellular, heterotrophic, sexually reproduce, motile
What is cell differentiation?
In differentiation cells become specialized and therefore different from each other. It develops different structural characteristics
Phylogenetic diagrams show
Evolutionary relationship of different species
Animals are classed into phyla based on
Body plan, embryonic development, fossil records, rRNA
Describe radial symmetry
Radial symmetry is a body plan in which the parts are organized in a circle around an axis. Destination top and bottom and No distinguished right left and front back
What are three germ layers, and what main structures develop from each layer? Put in order from inner to outer.
Endoderm- firms most of your organs. Mesoderm- skeleton cardio vascular system.
Ectoderm- forms skin and nervous system
Which phylum of invertebrates has no tissues?
Sponges
What is coelom?
A fluid filled cavity completely lined with mesoderm. Forms following gastrillation.
What is the distinguishing factor between vertebrates and invertebrates?
Bony spinal column and spinal cord
An organism with both male and female reproductive organ is?
Hermaphrodite
When an invertebrate embryo undergoes indirect development, it begins its life as a___
Direct development embryo begin life as___
-Larva
-Nymphs
What is cleavage?
The series of cell divisions that occurs immediately following fertilization is termed cleavage.
What is archenteron?
A cavity formed by gastralation that will become the gut tubes as the embryo matures
What is an animal with no body cavity called?
Acoelomates
What is the date of the blastopore in both types of development?
In protostomes the blastopore develops into a mouth in deuterostomes the blastopore develops in an anus.
