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Biology 08/20/12 Intro to Ecology & Science Skills

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Biology 08/20/12 Intro to Ecology & Science Skills. Review. Describe 5 characteristics of living things. What is the definition of a cell? What happens to an organism if its homeostasis is disrupted and not restored?.

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slide1
Biology 08/20/12

Intro to Ecology

&

Science Skills

review
Review
  • Describe 5 characteristics of living things.
  • What is the definition of a cell?
  • What happens to an organism if its homeostasis is disrupted and not restored?
some vocabulary
Ecology is the study of interactions that take place between organisms and their environment

Abiotic factors are nonliving parts of an organism’s environment

Biotic factors are living organisms that inhabit an environment

A Habitat is a place where an organism lives out its life.

A Niche is all strategies and adaptations a species uses in its environment—how it meets specific needs for food and shelter, how and where it survives, and where it reproduces

Some Vocabulary
levels of organization
Levels of Organization

Biosphere

The part of Earth

that contains all

ecosystems

Biosphere

Ecosystem

Community and

its nonliving

surroundings

Hawk, snake, bison, prairie dog, grass, stream, rocks, air

Community

Populations that

live together in a

defined area

Hawk, snake, bison, prairie dog, grass

Population

Group of

organisms of one

type that live in

the same area

Bison herd

levels of organization1
Levels of Organization

Organism

Individual living

thing

Bison

Tissues, organs,

and organ systems

Groups of

Cells

Nervous system

Brain

Nervous tissue

Smallest functional

unit of life

Cells

Nerve cell

Groups of atoms;

smallest unit of

most chemical

compounds

Molecules

DNA

Water

comprehension check
Comprehension Check
  • Give two examples of abiotic factors.
  • Give two examples of biotic factors.
  • What is the difference between an ecosystem and a community?
  • Give an example organism and describe it’s habitat.
slide7
Types of biotic relationships

1. Feeding - one organism eats another

a. predator - organism that hunts another

organism

b. prey - organism that is hunted

c. ex: lions feeding on a water buffalo

slide9
2. Symbiosis - close relationship between two or more organisms; at least one organism benefits:

The sacoglossan (Solar Powered Sea Slug)

showing the green network of ducts

which contain the green chloroplasts

from its algal food.

Two quite different groups of sea slugs have evolved

ways of using the ability of plants to convert the sun's

energy into sugars and other nutrients. In simple terms

they have become "solar powered".

The aeolid nudibranch Pteraeolidia ianthina which

"farms" colonies of brown single-celled algae

(zooxanthellae) in its body.

slide10
a. Commensalism- one organism benefits,

the other is neither helped nor harmed

The commensal shrimp Periclimenes imperator

b. Mutualism- both organisms benefit

from living together.

Lichen is any group of composite organisms made up of a fungus and an alga living in a symbiotic association. Fungus provides a structure that protect the alga from drying out and from harsh conditions.

Alga synthesizes and excretes a

specific carbohydrate that

is taken up and utilized as

food by the fungus.

slide11
c. Parasitism - one organism depends/ lives in or on another organism, the other organism is harmed. Ex: lamprey and vampire bat

Sea lamprey attached to

trout.

Vampire bat which feeds

on the blood of mammals

like cows.

Sucker like

mouth

of lamprey

comprehension check1
Comprehension Check
  • Give an example of a specific predator and its prey.
  • What is the difference between an commensalism and mutualism?
  • Give an example of a parasite.
switching gears
Switching Gears

Science Skills

making a graph from a table
Making a Graph from a Table

Water Released and Absorbed by Tree

Absorbed

by Roots

(g/h)

Released

by Leaves

(g/h)

20

Water released by leaves

Time

15

8 AM

1

2

Relative Rates (g/h)

10

10 AM

5

1

12

12 PM

4

5

2 PM

6

17

Water released by leaves

4 PM

9

16

0

6 PM

14

10

8 AM

10 AM

12 PM

2 PM

4 PM

6 PM

8 PM

8 PM

10

3

Time

making a graph from a table1
Making a Graph from a Table

Water Released and Absorbed by Tree

Absorbed

by Roots

(g/h)

Released

by Leaves

(g/h)

20

Water released by leaves

Time

15

8 AM

1

2

Relative Rates (g/h)

10

10 AM

5

1

12

12 PM

4

5

2 PM

6

17

Water released by leaves

4 PM

9

16

0

6 PM

14

10

8 AM

10 AM

12 PM

2 PM

4 PM

6 PM

8 PM

8 PM

10

3

Time

making a graph from a table2
Making a Graph from a Table

Water Released and Absorbed by Tree

Absorbed

by Roots

(g/h)

Released

by Leaves

(g/h)

20

Water released by leaves

Time

15

8 AM

1

2

10

Relative Rates (g/h)

10 AM

5

1

12

12 PM

4

5

2 PM

6

17

Water released by leaves

4 PM

9

16

0

6 PM

14

10

8 AM

10 AM

12 PM

2 PM

4 PM

6 PM

8 PM

8 PM

10

3

Time

using science skills
Using Science Skills
  • How many populations of organisms are represented by this community?
  • What are the non living elements in the ecosystem?
  • An ecosystem is part of what larger level of organization of organisms?
  • Each population is made up of what level of organization?
using science skills1
Using Science Skills
  • What units are used to measure length?
  • Why are conversions easier to do using the metric system?
  • What is the boiling point of water in C?
  • How many is kilo-?
  • How many milliliters is 2 liters?
slide19
Turn to Page 20Problem-Solving Lab 1.2Work with 1 partner to answerQuestions 1-4 in your Lab Notebook
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