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Bio 2 > Test 3 > Flashcards

Test 3 Flashcards

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Biology 101 flashcards
0
Q

In animals that display indeterminate development…

A

Early embryonic cells, if separated from the embryo, can develop into complete organisms

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1
Q

Protostomes develop through ___.

A

Spiral cleavage

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2
Q

A biologist discovered a new animal. Upon studying embryonic development, she observed spiral cleavage with the blastopore developing into a mouth. The animal was categorized as a ___.

A

Protostome

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3
Q

In which phylum of marine animals did symmetrical body plans first evolve?

A

Cnidaria

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4
Q

All of the following features are associated with bilateral symmetry in animals except…

A

Being sessile

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5
Q

Circulatory systems solved the problem of ___ in animals with coeloms.

A

The barrier to diffusion created by tissue surrounding the gut

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6
Q

Solid worms that lack a body cavity are known as ___.

A

Acoelomates

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7
Q

Which of the following is not true about animals?

A

They were some of the first organisms on the earth.

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8
Q

Which is the following terms is mismatched with its meaning or characteristics?

A

Diplomatic - ectoderm and mesoderm

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9
Q

Diplomatic

A

Ectoderm and endoderm

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10
Q

Triploblastic

A

Ectoderm, mesoderm, and endoderm

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11
Q

Parazoa

A

Lack symmetry, no tissues

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12
Q

Eumetazoa

A

Definite symmetry, tissues organized

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13
Q

Chordate

A

Animal with notochord

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14
Q

A zoologist studies an animal that is a deuterostome. Which of the choices makes the sentence that follows incorrect?

You know that deuterostomes…

A

Are animals in which the blastopore develops into the mouth

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15
Q

Segmentation is the subdivision of the body into segments or metameres. True segmentation is found in which of the following phyla selections?

A

Arthropoda, Annelida, and Chordata

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16
Q

Parazoa have no true ___.

A

Tissues

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17
Q

Which of the following terms does not apply to the phylum Porifera?

A

Diploblastic

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18
Q

Sponges are unique in possessing special flagellated cells whose beating drives water through the body cavity. These specialized cells are known as ___.

A

Choanocytes

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19
Q

Sponges exhibit all of the following general characteristics except

A

Three cell layers

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20
Q

All of the following are true about Cnidarians except

A

Their bodies are made up of distinct organs

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21
Q

Phylum Platyhelminthes is characterized by all of the following except

A

All are free-living

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22
Q

Flukes are parasitic worms whose josh during the larval stage are usually ___.

A

Snails

23
Q

The stage in the flukes life history in which it escapes from the snail and is ready to enter the intermediate or final host is the ___.

A

Cercariae

24
Q

Trichinella nematodes reach muscle tissue, forming resistant cysts, after

A

Entering the lymph channels following penetration of the intestine

25
Q

Which one of the following taxa is not part of the grouping of clades called lophotrochozoa?

A

Arthropoda

26
Q

Which of the following is not a type of Cnidarian?

A

Comb jelly

27
Q

The phylum that includes snails, clams, oysters, and octopuses is ___.

A

Mollusca

28
Q

In mollusks, the folds of tissue that arise from the dorsal body wall and enclose a cavity surrounding the visceral mass are called the ___.

A

Mantle

29
Q

The organ that is responsible for secreting cocoons in the Oligochaetes is known as the ___.

A

Clitellum

30
Q

Examples of mollusks that live on land are the ___ and ___.

A

Snails and slugs

31
Q

The cephalopod mollusks have ___.

A

Tentacles

32
Q

The sexual reproduction of earthworms characteristically is

A

Hermaphroditic but cross-fertilizing

33
Q

A biologist has been studying a mollusk that does not have a shell. It lives in the marine environment. Of the examples given, which one did the biologist study?

A

Octopus

34
Q

Select the mismatched pair of phylum Mollusca classes.

A

Bivalvia - snails

35
Q

A marine biologist visits your biology class and begins his talk entitled, “Life as a Trochophore.” A friend seated next to you asks, “what is a trochophore?” You explain that a trochophore is…

A

A term used to describe a larval form of either the phylum Mollusca or Annelida

36
Q

Which class of Arthropods contains members with two pairs of antennae and legs on their abdomen and thorax?

A

Crustacea

37
Q

The most successful class of Arthropods is ___.

A

Insecta

38
Q

In Arthropods, locomotion is accomplished by muscles that work against…

A

The exoskeleton

39
Q

Oxygen diffuses to the tissues of terrestrial Arthropods through the ___ and ___.

A

Trachea and tracheoles

40
Q

Chelicerae function as ___ or ___.

A

Fangs or pinchers.

41
Q

These Echinoderms have soft, slug-like bodies with tough, leathery skin. They are the ___.

A

Sea cucumbers

42
Q

The only living Echinoderms that are fully sessile are ___.

A

Sea lilies

43
Q

Small, fishlike marine chordates, pointed at both ends with no distinguishable head, in which the notochord runs the entire length of the nerve cord, are called ___.

A

Lancelets

44
Q

One of the most critical adaptations of the reptiles in relation to their life on land is the evolution of the …

A

Amniotic egg

45
Q

The chordates include all of the following except

A

Echinoderms

46
Q

Amphibians are thought to have evolved from what?

A

Lobe-finned fish

47
Q

Which of the following is not one of the membranes of the reptilian amniotic egg?

A

Ectoderm

48
Q

All of the following are features that contribute to the ability of reptiles to survive on dry land except

A

Endothermy

49
Q

The changes that were necessary to cope with the heavy energy demands of flight in birds include all of the following except

A

A three chambered heart

50
Q

Mammals are thought to have evolved from ___.

A

Therapsids

51
Q

Monotremes differ from the other mammals in their …

A

Laying of shelled eggs

52
Q

The correct listing of vertebrate groups ranked by species richness

A

Fish -> birds -> reptiles -> amphibians -> mammals

53
Q

The key specialization a that occurred in the evolution of mammals include all of the following except …

A

Reduction in brain size

54
Q

Modern-humans share the greatest similarities with which one of the hominids?

A

Cro-Magnons

Bio 2 (6 decks)

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