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