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Bio 2 Lab Practical > Phylum Chordata > Flashcards

Phylum Chordata Flashcards

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Biology 101 flashcards
1
Q

List the four principal features of the chordates shown in a generalized embryo

A

hollow dorsal nerve cord , pharyngeal slits , notochord , postnatal tail

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2
Q

what falls under the subphylum urochordata ?

A

Tunicates and Sea Squirts

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3
Q

what is the chemical composition of a tunic ?

A

cellulose

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4
Q

what falls under the subphylum cephalochordata ?

A

lancelets

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5
Q

how do lancelets obtain food ?

A

food particles are caught on the gill arches and eventually swept to the intestine; the anus is not terminal

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6
Q

how does a tunic obtain food ?

A

food collected by mucus on the pharyngeal basket is moved by cilia to the stomach and intestine. The intestine empties into the body cavity near the excurrent siphon

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7
Q

what is the most common genus of subphylum cephlochordata ?

A

branchiostoma

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8
Q

Do adults or larvae of urochordates posses the general chordate form?

A

larvae

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9
Q

what other groups of organisms has cellulose in its supporting structures?

A

plants (cell wall contains cellulose)

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10
Q

what does subphylum cephalochordata consist of?

A

lancelets

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11
Q

after water passes by the gill arches it moves into a surrounding chamber called an ____ and then leaves the body through the _____.

A

atrium, atriopore

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12
Q

what classes are under subphylum vertebrata?

A 
Agnatha
Chondrichthyes
Osteichthyes
Amphibia
Reptilia
Aves
Mammalia
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13
Q

Is lamprey an endoparatism or ectoparatism?

A

ectoparatism

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14
Q

The endoskeleton is _____ and the anterior gill arches are modified into jaws on sharks.

A

cartilaginous

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15
Q

what fins of sharks provide power and speed?

A

caudal fin

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16
Q

A caudal fin on a shark is asymmetrical heteroceral so a caudal fin on a bony fish is

A

Symmetrical homoceral

17
Q

In Osteichthyes, gills are protected by a movable gill cover called an

A

operculum

18
Q

What kind of receptor is a lateral-line system?

A

Mechanoreceptor

19
Q

Tongue and nostrils are what kind of receptor?

A

Chemoreceptor

20
Q

What is the sexual dimorphism of bony fish?

A

Gonad of female is pink and has eggs.

Gonad of male is pale and solid

21
Q

What fins of fish provide power and speed?

A

Pectoral fins

22
Q

Sharks lack ____ fin

A

anal

23
Q

Can fish move water over their gills without moving through the water?

A

Yes the operculum can open and close and bring in oxygen and water

24
Q

How does buoyancy of an air bladder/ swim bladder affection the motion of a fish?

A

Inflate - rises

Deflate - sinks

25
Q

What kind of fertilization do class amphibia take part of?

A

external fertilization

26
Q

Class amphibia are _____thermic.

A

pokilo

27
Q

What is a benefit of moist skin of class amphibia?

A

respiration

28
Q

What kind of fertilization do class reptilia take part of?

A

Internal fertilization

29
Q

Pokilothermic =

A

Abiotic

30
Q

Homeothermic =

A

Biotic

31
Q

The _____ allows oxygen to enter the porous shell but retains water within the egg.

A

Chorion

32
Q

The _____ encases the developing embryo within a fluid-filled cavity.

A

amnion

33
Q

The ______ provides food from the yolk for the embryo via blood vessels connecting to the embryo’s gut.

A

yolk sac

34
Q

The ____ surrounds a cavity into which waste products from the embryo are excreted.

A

allantois

35
Q

The ___ is analogous to the endosperm in plants.

A

yolk sac

36
Q

class aves consist of?

A

birds

37
Q

What is the most prominent / highly developed sense of a bird?

A

eyes

38
Q

what are wings of flying animals other than birds made of?

A

a lightweight skeleton

39
Q

Six adaptations of birds to flight

A 
Prominent Eyes 
Homeothermic 
High Metabolism 
Light skeleton 
efficient respiratory 
heavy musculature

Bio 2 Lab Practical (5 decks)

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