intro to animals (exam3) Flashcards
Are fungi heterotrophs or autotrophs?
heterotrophs
What is the difference in the way fungi vs animals break down food?
fungi break down food before consumption, while animals break down food after consumption
choanoflagellates are ____ protists, some are _____
-sensile
-colonial
How do choanoflagellates feed?
sticking a flagella into the water column to collect food particles
sponges are ____, ______ animals
-multicellular
-sensile
How do sponges feed?
they stick out a bunch of flagella to collect food particles
Sponges have an ____ for structural support.
-extracellular matrix
A few lineages of sponges have ____. Which is ____.
-epithelium
-real tissue
Are animals a monophyletic group?
yes
About how many lineages of animal phyla are currently recognised?
30-35
Diploblasts
tissues from 2 embryonic germ layres
Triploblasts
tissues from 3 embryonic germ layers
endoderm
inside tissue
mesoderm
middle tissue
ectoderm
outside tissue
radial symmetry
symmetry around a central access
bilateral symmetry
symmetry down the middle
Bilateral symmetry did not evolve all at once in the _____. Some components evolved ____.
-cambrian explosion
-earlier
cephalization
the nerves and sense organs all concentrate at one end of an organism
What is the difference between the nerve net and the central nervous system?
the nerve net has a random spread of nerves throughout the organism. the central nervous system follows and organised path an condenses at one end.
coelom
body cavity filled with mesoderm
The skin and nervous system develop from the ____.
ectoderm
The muscles and organs develop from the ____.
mesoderm
The gut (digestive tract) develops from the ____.
endoderm
Coelomates have an enclosed ____ completely lined with _____ derived tissue.
-coelom
-mesodermally
Acoelomates have no enclosed ____.
coelom
Pseudocoelomates have an enclosed ____ partially lined with ____ derived tissue.
-coelom
-mesodermally
Blastospore
the first opening in the embryo
In deuterostomes the ____ develops before the ____.
-anus
-mouth
In protostomes the ____ develops before the ____ (for the most part).
-mouth
-anus
Animal life cycles are normally ____ dominant.
diploid
metamorphosis
a common, drastic change of form from one developmental stage to another
