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Choose 2 phyla, give common examples of each phylum and distinguish among them relative to types of tissues, body symmetry and presence of type of body cavity. Briefly discuss why the phyla would be similar or different for these characteristics based on evolutionary relationships and environmental influences

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Reid Wolff
Reid WolffLv2
28 Sep 2019

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1 points

QUESTION 2

Most animals are viviparous.

True

False

1 points

QUESTION 3

The first phylum with ganglia in their nervous system are the ________________________.

Mollusca

Nematoda

Bivalvia

Platyhelminthes

1 points

QUESTION 4

The last common ancestor of all animals was probably a _____________________.

a unicellular worm

multicellular algae

flagellated protist

multicellular fungus

1 points

QUESTION 5

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foraminifera

radiolarian

ciliate

flagellate

1 points

QUESTION 6

Which of the following organisms would you expect to have the largest surface-area-to-volume ratio? Assume that all of the following are the same total length.

A mollusc

A nematode

A platyhelminth

Not enough information to determine.

1 points

QUESTION 7

If the animal is a hermaphrodite, it is said to be _______________.

dioecious

eutelic

monoecious

trioecious

1 points

QUESTION 8

A terrestrial animal species is discovered with the following larval characteristics: exoskeleton, system of tubes for gas exchange and segmentation. A knowledgeable zoologist should predict that the adults of this species would also feature ____________.

eight legs

two pairs of antennae

a sessile lifecycle

an open circulatory system

1 points

QUESTION 9

The Phylum Echinodermata exhibits metamerism.

True

False

1 points

QUESTION 10

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a larger volume-to-surface area ratio is adaptive in many mammals

evolution generally progresses toward some goal

evolution tends toward increased complexity or increased size

in particular environments, similar adaptations can be beneficial to more than one species

1 points

QUESTION 11

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The mosquito would develop a weak exoskeleton, making it easy prey.

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1 points

QUESTION 12

Holometabolis refers to complete metamorphosis.

True

False

1 points

QUESTION 13

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Condition 2 only

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Conditions 2 and 3

1 points

QUESTION 14

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are predictions of future events

1 points

QUESTION 15

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reproduce

arrange their cells into tissues

become symmetrical

form an embyro and establish a basic body plan

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