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BIO Exam 4 > Chapter 31 > Flashcards

Chapter 31 Flashcards

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Biology 101 flashcards
1
Q

Animals that have no particular symmetry exhibit

A

asymmetry

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2
Q

Which type of animal symmetry produces mirror images of each other no matter how the animal is sliced longitudinally?

A

radial symmetry

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3
Q

The term deuterostome refers to

A

the second embryonic opening becoming the mouth.

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4
Q

Which difference distinguishes protostomes from deuterostomes?

A

Their embryonic development is different.

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5
Q

T or F? Protostomes form a true coelom.

A

True

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6
Q

T or F? In protostomes, the first opening during embryonic development becomes the anus.

A

False

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7
Q

T or F? Protostomes will become mollusks, annelids, and arthropods

A

True

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8
Q

T or F? Protostomes are more advanced than acoelomates, but not as advanced as deuterostomes

A

True

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9
Q

T or F? Sponges have no nerve fibers.

A

True

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10
Q

T or F? Sponges have no fully developed muscle fibers.

A

True

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11
Q

T or F? Amoeboid cells capture food particles from the water.

A

False

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12
Q

T or F? Sponges may reproduce asexually by budding or by regeneration from a small piece.

A

True

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13
Q

Why are real bath sponges so soft?

A

The harder silica or calcium spicules are absent and the softer spongin remains.

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14
Q

A recent study of the marine hawksbill turtle’s stomach contents revealed that sponges constitute a major portion of their diet. Sponge beds are generally protected from predators by the sponge’s calcium and silica crystals, but these were found in quantity in the turtles’ digestive systems. These structures that protect the sponges from most predators, but not turtles, are

A

spicules

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15
Q

Which of the following organisms exhibit radial symmetry as adults?

A

cnidarians

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16
Q

T or F? In cnidaria, the adult body is bilaterally symmetrical.

A

False

17
Q

T or F? In cnidaria, there are two tissue layers: an outer epidermis and inner gastrodermis.

A

True

18
Q

T or F? In cnidaria, stinging cells contain a threadlike nematocyst released to capture prey.

A

True

19
Q

T or F? In cnidaria, a jellylike mesoglea contains cells that form a nerve net throughout the body

A

True

20
Q

The stinging cells or nematocysts are characteristic of

A

cnidarians

21
Q

The molluscs look so different, and yet we can tell they are related because they all

A

have a mantle, visceral mass, and a foot.

22
Q

Which of the following is NOT characteristic of earthworms?

A. segmentation
B. hermaphroditic
C. paired nephridia in each segment
D. dorsal solid nerve cord

A

D. dorsal solid nerve cord

23
Q

Earthworms are

A

annelids.

24
Q

Which type of organism is characterized by having jointed appendages, ability to molt, and three sets of fused segments?

A

arthropods

25
Q

The largest animal group, both in number of species and number of individuals, is the

A

insects

26
Q

T or F? Arthropods have a variety of respiratory organs.

A

True

27
Q

T or F? Arthropods have a well-developed nervous system.

A

True

28
Q

T or F? arthropods have jointed appendages and a segmented body.

A

True

29
Q

T or F? Arthropods have a tough exoskeleton that grows by expansion.

A

False

30
Q

A major characteristic of the arthropods is the presence of

A

jointed appendages.

31
Q

characteristics of echinoderms

A

endoskeleton of spiny, calcium-rich plates, larva is bilaterally symmetrical, both sexual and asexual reproduction

32
Q

examples of organisms of Bilateria

A

snails, earthworms, sea stars, butterflies

33
Q

Characteristics of sponges

A

no true tissues, animal, skeleton with spicules or protein spongin, asymmetrical

34
Q

Characteristics of anemone

A

polyp, cnidarian, radial symmetry, cnidocytes

35
Q

Characteristics of a snail

A

mantle, gastropod, bilateral symmetry, mollusc

36
Q

Characteristics of squid

A

cephalopod, bilateral symmetry, camera-type eye, mollusc

37
Q

Characteristics of a spider

A

exoskeleton, arthropod, book lung, chelicera

38
Q

Characteristics of crab

A

exoskeleton, arthropod, molts to grow, crustacean

39
Q

Characteristics of sea stars

A

deuterostome, echinoderm, tube feet, larva with bilateral symmetry

BIO Exam 4 (5 decks)

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