Ch 15 NOTES #1 4/11

INTERACTIONS

WELCOME TO A NEW MARKING PERIOD!

Please take a pre-test for Chapter 15 and answer the best you can.

ECOLOGY……

What do you think about when you hear this word?

LEARNING TARGETS

OVERACHING GOAL: to understand the interactions between animals and their environment.

LEARNING TARGET

* I can explain what symbiosis is and tell the difference of the 3 types.

ECOLOGY

Studying the interrelationship between animals and their environment

HABITAT – where organism lives

NICHE – role in community

what it eats, where lives, etc.

POPULATION – group of one species

COMMUNITY – several populations together

INTERACTIONS BETWEEN ORGANISMS

1. SYMBIOSIS – living together

a. MUTUALISM

2 organisms living together where both benefit

EX:

Termite & protozoa

Bees/birds and flowers

Lichen – algae and

fungus

b. PARASITISM – one organism benefits, the other harmed

PARASITE – lives on another organism

HOST - organism the parasite lives on

EX: tapeworms

mosquitoes

fleas

c. Commensalism - one animal benefits and the other unaffected

EX: burrs sticking on fur

grazing animals kicking up bugs for birds

WARM UP #1 4/12

VOCAB: * do not use notes!

1. Living together

2. One organism benefits, the other nothing

3. Both organisms benefit

4. One benefits, the other harmed

5. Now go back and see if you are right with your notes, correct any you got wrong.

LEARNING TARGETS 4/12

• Look at your 1st target. Put a 1-5 in how good you feel you know it in the 1st space.

• Add a new target today:

I can describe a predator/prey relationship.

FINISH NOTES CH 15 #1

• Watch video

• Assignment

2. COMPETITION – the struggle for limited resources

LIMITED RESOURCES:

space, light, food, water

3. Predator/ Prey

PREDATORS – animals that seek out and kill other animals for food

PREY – organisms that are eaten

• Prey species often evolve protective mechanisms

Mimicry 

Methods of defense: (KNOW 5)

Camouflage Bright Colors Poison Smell/Taste Staying in Large Groups (herds) MimicryHorns/ antlersRoars or Frightening Sounds

PLANT ADAPTATIONS

EX:• Spines• Waxy leaves• Deep roots• Wide leaves• Covered seeds• Thick bark• Drop leavesTons more!

What are the 3 main types of interactions we talked about?

Symbiosis

Competition

Predator /Prey