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1. this phylum has a true coelom and differentclasses of this phylum modify the mantle and foot (major structuresin this phylum) to serve different purposes.


2. which phyla has apseudocoelom rather than a true coelom and lacks bodysegments

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Deanna Hettinger
Deanna HettingerLv2
28 Sep 2019

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QUESTION 94

Which characteristic is shared by Phylum Cnidaria and Phylum Platyhelminthes?

dorsoventrally flattened bodies

radial symmetry

a distinct head

a digestive cavity with a single opening (sac-like)

1 points

QUESTION 95

Which of the following is not a characteristic of members of Phylum Porifera?

choanocytes

asymmetry

nervous system

spicules

1 points

QUESTION 96

Most animals are bilaterially symmetrical deuterostomes.

True

False

1 points

QUESTION 97

Parasitism is one of the most widespread life strategies to evolve. Which of the following supports this finding?

Parasites almost always predigest their hosts' tissues and, therefore, spend less energy and require fewer structural adaptations.

Parasites, unlike predators, feed on almost all the tissues of their hosts.

Parasites do not generally kill their hosts; thus they can feed on the same host throughout the host's normal life span and do not have competition from decomposers.

Parasites generally kill their host and can feed for a very long time because they are much smaller than their host.

1 points

QUESTION 98

The production of sterile mules by interbreeding between female horses (mares) and male donkeys (jacks) is an example of _____.

reduced hybrid viability

hybrid breakdown

reduced hybrid fertility

mechanical isolation

1 points

QUESTION 99

A snail-like, coiled, porous test of calcium carbonate is characteristic of

diatomes

ciliates

water molds

foraminiferans

1 points

QUESTION 100

Which group of algae can create "red tide"?

Phaeophyta

Dinoflagllata

Rhodophyta

Chlorophyta

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