introduction to cells unit 4. pre-warm up: start a new table of contents – “life science –...

Introduction to CellsUnit 4

PRE-WARM UP:• Start a new Table of Contents – “Life Science –

Molecular Biology”• Write your homework – leave it to be

stamped• MAKE SURE YOUR YOU HAVE SOMETHING TO

CORRECT YOUR TEST WITH!Date Session

#Activity Page

#1/27 & 1/28

1 What Does it Mean to be Alive? 1

Introduction to Cells Note Guide 2

Photosynthesis & Cellular Respiration Homework 3

PRE-WARM UP:

• On page 1 of your notebook, answer the following questions: –What does it mean to be alive?

• How do you determine if something is living?

–What do the words biotic & abiotic mean?

WARM UP:

Surprise!! We are going outside for

our warm-up!

Living vs. Nonliving

TASK 1:Make a list of 5 living & 5 non-living things

TASK 2:Make a list of characteristics you used to determine if something living

BIOLOGY

5 Characteristics of Living Things:

Organized structureMade of cells!

Grow and Develop Respond to Environment Reproduce*Need/use energy

Quick Comprehension !

Whiteboards ready!

• Living (L)• Non-living (N)

Living or Nonliving?

Living or Nonliving?

Living or Nonliving?

Living or Nonliving?

Living or Nonliving?

Let’s Start With Organized Structure…

Organism- A living thing made up of AT LEAST one cell (most have many cells)

Wait a Minute!....What‘s a cell???

What is a cell?Cell- the smallest unit of any living thing

2 Types of Organisms: One Cell or Many Cells?

Unicellular• Organisms made up

of only ONE cell• Examples: amoeba,

bacteria

Multicellular• Organism made up

of MANY cells• Examples: plants,

animals, humans

OK…The truth about cells:

• The reason cells are important to life is summarized in the Cell Theory:

1.Every living thing is made of one or more cells.2.Cells carry out the functions needed to

support life.3.Cells can only come from other living cells.

Cell Theory: Example1. Every living thing is

made up of one or more cells.

A polar bear is a multicellular organism.

2. Cells carry out the functions needed to support life.

Every type of cell has a different function, for example fat cells

provide extra energy as well as insulation.

400x

3. Cells come only from other living

cells. Each polar bear cub

began as a single cell. That single cell split

into 2, those 2 split into 4 and so on…

Quick Comprehension !

Whiteboards Ready!

Quick Comprehension !

•What Is Biology ?

Quick Comprehension !

•What determines if something is

living?

Quick Comprehension !

•What’s an organism ?

Quick Comprehension !

•What is this cell theory and why

do I care?

Quick Comprehension !

•What are the 2 types of

organisms?

Well…There are also 2 Types of Cells

Eukaryotic Prokaryotic

2 Types of CellsEukaryotic Cell

• HAS A NUCLEUS• EXAMPLE: plant and

animal cells (multicellular)

Prokaryotic Cell

• NO NUCLEUS• EXAMPLE: bacteria

cells (unicellular)Nucleus

What is the exception to the rule?

Quick Comprehension !

Whiteboards Ready!

- Multicellular or UnicellularAND

- Eukaryotic or prokaryotic

“ME” & “UP”

Unicellular or multicellular?

E. Coli Bacteria Cell

Eukaryotic or prokaryotic?

Unicellular or multicellular?

Human Red

Blood Cells

Eukaryotic or prokaryotic?

Unicellular or multicellular?

Fungi Cell

Eukaryotic or prokaryotic?

Unicellular or multicellular?

Human Cheek Cells

Eukaryotic or prokaryotic?

Unicellular or multicellular

Onion Root Cells

Eukaryotic or prokaryotic

Unicellular or multicellular?

Spiral Bacteria

Eukaryotic or prokaryotic?

Unicellular or multicellular

Leaf Cells

Eukaryotic or prokaryotic?

Unicellular or multicellular

Protists

Eukaryotic or prokaryotic?

Tie It Together…What Do All Cells Need?

• Ok, regardless if an organism is unicellular or multicellular – prokaryotic or eukaryotic…what do they all need to function????

ENERGY!!!!

Where Do They Get Their Energy?

It Depends…Animal Cells – consume food and their cells

create energy through the process of CELLULAR RESPIRATION

Plant Cells – use the sunlight and their cells convert it into energy through the process of PHOTOSYNTHESIS

But How…?• Read about the 2 processes for now, and next

time we will see how each part of a cell has a specific job to do to make these processes possible!– DO NOW: Read the Photosynthesis & Cellular

Respiration article and answer the questions– HOMEWORK: Create a Venn diagram or chart

on the back to compare & contrast the processes!

HOMEWORK

• Complete the reading on Photosynthesis & Cellular Respiration and answer the questions.

• DON’T forget to create the Venn diagram on the back!!

Extra Credit Opportunity

• Discovery of Cells: 10 points• Research the following information and write a well

crafted paragraph about it:– When was the microscope invented?– Who invented the microscope?– When was the first cell discovered?– Who discovered it?– Add 2 additional facts that you found that support

this topic and its importance to the field of biology