Bio quiz 3 Ch. 30
What phyla are deuterostomes?
Echinodermata (echinoderms) and Chordata
All animals are
Heterotrophs, multicellular
what is the key characteristic that defines the ecdysozoa clade?
The animal molts
the common ancestor of all animals is/are the:
choanoflagellates
which of the following explains why if you were animals live in freshwater than in the ocean
freshwater is generally hypotonic to tissue fluids
what molecular device have been found in cnidarians, which has radial symmetry, that is evidence to indicate cnidarians shade a common ancestor with bilateral animals?
Hox genes
which of the following is a major problem for sessile animals?
They are unable to escape unfavorable environmental conditions
what are the characteristics about animals?
animals are consumers, animals have specialized cells, animals are multicellular eukaryotes, animals have a life cycle of development
what pair of words is incorrectly matched?
coelom - no body cavity
the lining of the digestive tube is formed from:
endoderm
the term "cleavage" refers to a series of meiotic cell divisions
false- mitotic
protostomes exhibit radial cleavage
false- spiral
which was the primary challenge animals faced in adapting to life on land?
the desiccating effect of the atmosphere
The first million animals likely moved onto land how long ago?
450 million years ago
How is a pseudocoelom different from a coelom?
A coelom is a cavity fully lined by mesoderm
what are the two classes of protostomes?
Lophotrochozoa and Ecdysozoa
which animal phylum has asymmetrical body plan?
Porifera
The head end of an animal is known as its:
anterior end
The first air breathing land animals were
arthropods
what statement about bilateral symmetry is false?
bilateral symmetry evolved in cnidarians
The diverse body plan seen in animalia apparently developed during the
cambrian period
you are told that the digestive tract of the animal you are studying developed an anus before the mouth. you realize that you may be looking at an :
cat
The epidermis of a nematode is derived from the:
ectoderm
diploblastic animals, such as cnidarians and _____ have only two germ layers, ectoderm has ____
ctenophores ; endoderm
which group of organisms display radial cleavage during development?
echinoderms
which of the following is not an adaptation needed for living on land?
external respiratory surfaces
in deuterostomes, the blastopore develops into the mouth
false- anus
the rapid appearance of animals in the fossil record occured during the ediacaran radiation
false- cambrian
a true coelom develops from the endoderm
false- ectoderm
the nervous system develops from the endoderm
false- ectoderm
Because it is an enclosed compartment of fluid under pressure, the coelom can serve as a ____ which shapes the body of soft animals
hydrostatic skeleton
which statement best supports why animals most likely evolved in the ocean?
internal fluid and salt balance was easy to maintain
what is false about the development of a coelom?
it requires animals to have either two or three tissue layer
a marine invertebrate placed into freshwater would have difficulty surviving because
it would have difficulty with osmoregulation
The ______ gives rise to muscles, bones, and the circulatory system.
mesoderm
a true body cavity completely surrounded by ____ is called a coelom
mesoderm
your abdominal cavity surround by _____ is called a coelom.
mesoderm
A grasshopper belongs in the Ecdysozoa clade because of its ability to:
molt
In most protostomes, the blastopore develops into the:
mouth
How Do Protosomes and Deuterostomes differ?
protosomes undergo spiral cleavage during development
If adult sponges are sessile, why can they still be classified as animals?
sponge larvae are motile
what statement about echinoderms is false?
they show evidence of segmentation
Sponges have specialized cells but no _______
tissues
Deuterostomes are split into the Ecdysozoa and the Lophotrochozoa.
false- protostomes