Bio 121 Lab Exam 1 Flashcards Preview

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Flashcards in Bio 121 Lab Exam 1 Deck (70):
1

Unicellular Green Algae

Desmids
Micrasterias
Chlamydomonas
Volvox
Spirogyra
Oedogonium

2

Chlamydomonas

Unicellular green algae
Move with flagella

3

Chlamydomonas Sexual Lifecycle

Zoospores (haploid cells) have different mating strains (+ or -): isogametes
Zoospore nuclei fuse (syngamy): sexual reproduction
Zygote is resistant to environmental stressors
Meiosis produces more zoospores

4

Volvox

Colonial green algae
Individual cells connected to each other by cytoplasmic strands

5

Spirogyra

Filamentous green algae
Grow in end-to-end chains
Photosynthetic: ribbon-like chloroplasts

6

Spirogyra Sexual Lifecycle

Haploid vegetative cells have opposite mating strains
Mating strains connect via conjugation tube
Male gamete fuses with female gamete
Resistant zygote forms
Asexual reproduction: fragmentation

7

Oedogonium

Filamentous green algae
Have distinctive male and female parts

8

Oedogonium Sexual Lifecycle

Antheridium (male part) releases antherozoids
Antherozoids travel to Oogonium (female part)-fuse with egg
Oospore (diploid) undergoes meiosis to form zoospore (haploid)
Zoospore forms into a filament
Mitosis occurs by fragmentation

9

Brown Algae

Phaeophyta

10

Red Algae

Rhodophyta

11

Hepatophyta

Bryophyte member
Liverworts (Marchantia)
Nonvascular

12

Liverwort Sexual Lifecycle

Sperm is released from antheridium- travels to archegonium
Sporophyte (diploid) develops in archegonium
Sporophyte produces thallus (long thick sheet- haploid)
Gemma cups on thallus disperse spores (asexual reproduction)

13

Pterophyta

Seedless vascular
Ferns
Equisetum (common fern)
Asplenium
Matteuccia (observed in lab)

14

Fern Sexual Lifecycle

Sporangium produce spores (haploid)
Spores develop into gametophytes
Underside of gametophyte contains archegonium and antheridium
Sperm is released from antheridium and travels to archegonium
Fertilization of egg produces zygote
Zygote develops into sporophyte (leaf)
Sporangium are located on underside of leaf

15

Prothallium

Fern gametophyte

16

Bryophyta

Non-vascular
True moss
Sphagnum

17

Lycophyta

Seedless vascular
Lycopodium (club moss)
Selaginella (resurrection plant)

18

Ginkgophyta

Vascular seeded
Ginkgo

19

Cycadophyta

Vascular seeded
Zamia

20

Gnetophyta

Vascular seeded
Welwitchia

21

Coniferophyta

Vascular seeded
Pinus

22

Nematodes

Ascaris Lumbricoides
Phylum Nematoda

23

Chiton

Phylum Mollusca
Class Polyplacophora

24

Jellyfish

Physalia
Phylum Cnidaria
Class Scyphozoa

25

Spider (Black Widow)

Latrodectus mactans
Phyla Arthropoda
Subphyla Cheliceriformes

26

Polychaetae (Sand worm)

Nereis virens
Phylum Annelida

27

Sponge

Neoesperiopsis (sponge with finger-like projections; orange)
Callyspongia (similar to above, but pink and larger pores)
Phylum Porifera

28

Snail

Achantia
Phylum Molusca
Class Gastropoda

29

Starfish

Asterias forbesii
Phylum Echinodermata
Class Asteroides

30

Fruit fly

Drosophila melanogaster
Phylum Artrhopoda
Class Hexapoda

31

Leech

Hirudo
Phylum Annelida
Class Oligochaeta

32

Turtle

Testudines
Phylum Chordata
Superclass Tetrapoda
Class Reptilia

33

Anemone

Metridium marginatum
Phylum Cnidaria
Class Anthozoa

34

Urchin

Arabacia punctulata
Phylum Echinodermata
Class Echinoidea

35

Flukes

Flat worms
Phylum Platyhelminthes
Class Trematoda

36

Octopus

Phylum Molusca
Class Cephalopoda

37

Lobster

Cambarus
Phylum Arthropoda
Class Crustacea

38

Roundworm

Caenorhabditis elegans
Phylum Nematoda

39

Tape worm

Moniezia
Phylum Platyhelminthes
Class Cestoda

40

Bird (American Kestrel)

Falco sparverius
Phylum Chordata
Class Aves

41

Clitellum

Asymmetrical part of worm
Secretes cocoon for fertilized eggs

42

Prostonium

Nose of worm

43

Seta

Bristles of worm

44

Seminal vesicle

Male reproductive part of worm

45

Seminal receptacle

Female reproductive part of worm

46

Crop

Food storage; first part of digestive system of worm and grasshopper

47

Typhlosole

Dorsal, inward fold of intestine of worm

48

Cuticle

Outer covering of worm

49

Nephridium

Excretory organ of worm

50

Caeca

Clasp crop and stomach of grasshopper

51

Malpighian tubules

Clasp intestines of grasshopper

52

Ovipositor

Digging back organ of female grasshopper- used for laying eggs

53

Ocelli

Simple eyes of grasshopper
Located below antennae

54

Labrum

Top covering of mouth of grasshopper

55

Mandible

Chewing organ of grasshopper
Located on sides of head

56

Maxilla

Part of grasshopper mouth
Outer part: sensory
Inner part: food handling

57

Labium

Bottom covering of mouth of grasshopper

58

Tympanum

Eardrum of grasshopper
Located on side of body

59

Spiracles

Respiratory system of grasshopper
Small holes along abdomen

60

Digestive system comparison

Worm: coelom; typhlosole, pharynx, esophagus, crop, gizzard, intestine
Grasshopper: coelom; esophagus, crop, stomach, gastric caeca, intestine, rectum

61

Nervous system comparison

Worm: ventral nerve cord
Grasshopper: ventral nerve cord and ganglia

62

Reproductive system comparison

Worm: seminal receptacles, seminal vesicles, clitellum
Grasshopper: ovipositors

63

Circulatory system comparison

Worm: ventral and dorsal vessels; closed; 5 "hearts"
Grasshopper: open; 1 heart

64

Excretory system comparison

Worm: nephridia
Grasshopper: malpighian tubules

65

Sensory system comparison

Worm: few sensory organs
Grasshopper: tympanum, eyes, antennae

66

Respiratory system comparison

Worm: tiny blood vessels
Grasshopper: spriacles, tracheal tubes

67

Structure comparison

Worm: hydrostatic
Grasshopper: exoskeleton

68

Symmetry comparison

Worm and Grasshopper: bilateral

69

Muscle comparison

Worm: circular and longitudinal
Grasshopper: complex, attached to exoskeleton

70

Sexes

Worm: hermaphroditic
Grasshopper: separate