Animals Flashcards
Animals are __________, and they ingest living or dead organic matter
heterotrophic
Most animals are ________, at least during some life stages
Motile
Do most animals reproduce sexually or asexually?
Sexually
Offspring pass through a series of _________ that establish a determined body plan (shape)
developmental stages
A collection of similar cells with a common embryonic origin
Tissue
External and Internal coverings
epitheliail
Blood, cartilage & bones, various functions such as transport or structural support
Connective
Contracts - locomotion + movements within the body
muscle
neutrons for rapid communication and control
nervous
Most animals undergo a layering of early tissues during _______
embryonic development
germ layer 1
diploblastic ectoderm and endoderm
dee
germ layer 2
triploblastic ectoderm, mesoderm, and endoderm
teme
in triploblasts, there is a mesoderm-derived, epithelial-lined cavity between
the digestive system and the body wall
ds and bw
in triploblasts, the mesoderm-derived, epithelial-lined cavity is usually filled with
fluid
in triploblasts, the mesoderm-derived, epithelial-lined cavity houses _________ and contains the __________
organs, circulatory system
Acoelomates have no _______ and their mesoderm region is completely filled with _________
colem, tissue
pseudocolemates are a body cavity derived partly from both ______ and _______
mesoderm and endoderm
Eucoelomates are defined as
a true coelom
animals may be __________, __________, or _________
asymmetrical, radial, or bilateral
arb
Bilaterally symmetrical, triploblastic eucoelomates can be divided into two groups based on differences in their early embryonic development
protostomes and deuterostomes
PD
Animal evolution began in the ocean over ________ years ago
600 million
there are more than ________ species of animals but there may be as many as _________
1.4, 6.8
______% of animal species are _________
95, invertabrates
informal group of animals without backbones
invertebrates
________ appear to represent an early stage of multicellularity in the animal clade
sponges
colonial, flagellated, protists
porifera
are porifera symmetric or asymmetric?
asymmetric
porifera have ___________ for particular functions, and ___________
specialized cells, no tissues
Porifera are _______ and most are ________
aquatic, marine
am
___________ is the largest phylum in the animal words in terms of numbers and species
Arthropoda
what are protostomic eucolomates with a hemocoel
arthropoda
arthropoda account for _______% of known species
85
arthropoda have functional _________ and ___________
body segmentation, jointed appendages
fused ________ may form a head, thorax, abdomen, or a cephalothorax, and abdomen, or a head and trunk
segments
Trilobitomorpha
Trilobites and extinct
Horseshoe crabs, arachnids, scorpions, and daddy longlegs
Chelicerata
Crabs, lobsters, crayfish, isopods, barnacles, and some
zooplankton
Crustacea
millipedes, centipedes, and relatives
Myriapoda
Insects and relatives
Hexapoda
Hexapoda have _______ legs (_____ pairs)
6 , 3
The _______’s body segments are fused into
- head with mouth, eyes & antennae
- thorax with legs and wings (if present)
- abdomen with anus
hexapoda
Hexpoda do gas exchange via _______ that goes to the outside through _______
tracheae, spiracles
Dragonflies and Damselfies
The Odnata
_______ were some of the first winged insects to evolve
Odonata
there are ________ known species of dragonflies
5000+
the aquatic larval stage of Odanta can last up to ________
two years
_________prey on tadpoles, mosquitos, fish other insect larvae, and even each other
nypmhs
adult Odanta catch insect prey with their ______, efficient hunters catch ______
feet, 90-95%
a single dragonfly can eat ________ of mosquitos/day
30 to hundreds
