Transparencies LSci 7 Unit3

(1)

SCIENCE EXPLORER

Focus on Life Science

28

Exploring Redi’s Experiment

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One jar was

left uncovered.

The second jar

was covered.

Maggots

appeared on the

meat in the

open jar.

(2)

29

Exploring Pasteur’s Experiment

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Pasteur boiled

the broth in one

flask only.

Bacteria grew in

the unboiled broth

but not in the

boiled broth.

When the boiled

broth was exposed

to air, bacteria

(3)

30

Seven Levels of Classification

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Kingdom Animalia

Phylum Chordata

Class Aves

Order Strigiformes

Family Strygidae

Genus

Bubo

(4)

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31

How a V

(5)

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32

Exploring How Active V

iruses Multiply

The virus

injects its genetic material.

The bacterium

_{starts to produce the virus’}

s proteins and

genetic material.

The bacterium

bursts open, releasing new viruses.

New

viruses assemble.

A virus

(6)

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33

Exploring How Hidden V

iruses Multiply

A virus attaches

to a bacterium.

The virus injects

its genetic material.

The virus’

s genetic material

becomes a part of the genetic material of the bacterium.

The virus’

s

genetic material becomes active.

New viruses

assemble.

The bacterium

(7)

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34

The Structure of a Bacterial Cell

Flagellum

Cytoplasm

Genetic material

Ribosome

Cell membrane

(8)

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35

Exploring Protozoans—

Ameba

Pseudopod

Food vacuole

Cell membrane

Contractile vacuole

Nucleus

(9)

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36

Exploring Protozoans—

Paramecium

Food vacuole

Oral groove

Pellicle

Contractile vacuoles

Anal pore

Cytoplasm

Small nucleus

Large

nucleus

(10)

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37

The Structure of a Euglena

Flagellum

Eyespot

Contractile vacuole

Nucleus

Pellicle

(11)

38

The Structure of a Mushroom

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Cap

Gills

Stalk

Hyphae

(12)

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39

(13)

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40

The Life Cycle of Plants

Sporophyte

Produces spores

Produces egg cells

Produces sperm cells

Gametophyte

Egg cells

Sperm cell

(14)

(15)

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42

The Structure of Seeds

_Corn

Seed coat

Cotyledon

Stored food

Embr

yo

Embr

yo

Embr

yo

Cotyledon (stores food)

(16)

43

Exploring a Leaf

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Cuticle

Upper

leaf cells

Xylem

Phloem

Lower

leaf cells

Stomata

Chloroplasts

Vein

(17)

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44

The Parts of a W

oody Stem

Pith

Bark

Cambium

Xylem

Heartwood

Sapwood

Inner bark or phloem

(18)

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45

Exploring the Life Cycle of a Gymnosperm

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A pine tree

produces male

and female

cones.

_{cones contain}

Female

ovules.

Male cones

produce pollen.

Pollination

occurs.

An egg

forms in

an ovule.

Fertilization

occurs.

A seed develops.

A seed grows

into a seedling.

Scale on female cone

Scale on

male cone

Ovule

(19)

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46

(20)

47

Exploring the Life Cycle of an Angiosperm

The angiosperm

produces flowers.

The

anther

produces

pollen.

Pollination

occurs.

Fertilization

occurs.

A seed

develops.

An egg

cell is

produced

in each

ovule.

A fruit

encloses

the seeds.

A seed

grows into

a new plant.

(21)

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(22)

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49

Exploring a Sponge

Pore

Collar Cell

Osculum

Spikes

(23)

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50

Exploring the Life Cycle of a Dog T

apeworm

T

apeworm enters dog’

s

digestive tract.

T

apeworm attaches to

_intestine.

Rabbit eats tapeworm eggs.

Dog eats infected rabbit.

Hooks

(24)

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51

(25)

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52

Exploring a Snail

T

entacle

Eye

Foot

Radula

Shell

Stomach

Mantle

Mouth

(26)

53

Exploring a Crayfish

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Cheliped Walking Leg

Swimmeret

Compound Eye

Small Antenna Large

Antenna

(27)

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54

Grasshopper Anatomy

Abdomen

Head

Wi

n

g

Simple eye

Compound

eye

Antenna

(28)

55

Exploring Insect Metamorphosis

Larva

Egg

Adult male

grasshopper

Pupa

Adult

Egg

Nymph

Larger

Nymph

C O M P L E T E

M E T A M O R P H O S I S

G R A D U A L

M E T A M O R P H O S I S

Adult

(29)

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56

Exploring a Sea Star

Stomach

Spines

T

ube Feet

Opening for W

ater

W

ater V

ascular System

(30)

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57

V

(31)

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58

Exploring a Bony Fish

Lateral Line

Stomach

T

ail Fin

Fins for Balance

Gills

Scales

Anus

Gill Cover

Heart

(32)

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59

Frog Metamorphosis

Legless tadpole

Hind legs develop

Fertilized eggs

Front legs

develop

(33)

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60

Exploring a Frog

Skin

Eyes

Ears

Mouth

Lungs

Hind Legs

Stomach

Heart

(34)

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61

A Reptile Egg

Air space

Shell

Albumen

(egg white)

Membrane

Embr

yo

Y

olk

(35)

62

Exploring a Lizard

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Skin

Nostrils

Eyes

Kidney

Heart

Crest

Dewlap

Claws

(36)

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63

Cir

culation in Fishes, Amphibians, and Birds

Fish

Bird

(37)

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64

Exploring a Bird

Air Sacs

Heart

Gizzard

Contour

Feathers

Bill

(38)

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