CELLS!

Does anyone know how small a cell is? http://www.cellsalive.com/howbig.htm

Cells are made of many parts Organelles – literally means “little

organs” Each of these carries out a specific

function.

Pick a partner and work together to list and describe the functions of each organelle in your diagrams.

Write this in your notebooks! It will be checked for completion!

Plant Cell

Vacuole Chloroplast Cell membrane Cell wall Golgi apparatus Mitochondrion Smooth endoplasmic reticulum Ribosome Nuclear Envelope Nucleolus Nucleus Rough endoplasmic reticulum

Animal Cell

Nucleolus Nucleus Nuclear envelope Rough Endoplasmic Reticulum Golgi apparatus Ribosome Cell membrane Mitochondrion Smooth Endoplasmic Reticulum Centrioles

Bacterial Cell

Peptidoglycan- mesh-like layer outside plasma membrane of bacteria.

Cell wall Cell membrane Ribosome Pili – connect bacterium to another DNA- Deoxyribonucleic Acid, contains

genetic code. Flagellum – used for locomotion

(movement)

What makes something living?

Characteristics of LIFE

1. Made up of cell/s Multicellular – many cells Unicellular – one cell

2. Able to reproduce Sexual reproduction- two cells from

different parents unite to produce a new organism.

Asexual reproduction- the new organism has one parent

Characteristics of LIFE

3. Have genetic code from parent/s Offspring resembles their parent/s DNA carries the genetic code

Characteristics of LIFE

4. Can grow and develop Grow in size Develop specialized cells Mature

Characteristics of LIFE

5. Need material (food) for energy Metabolism- chemical reactions in which

an organism breaks down and builds up materials to carry out life processes.

Characteristics of LIFE

6. Respond to the environment Stimulus- a signal to which an organism

responds. Light Temperature Low glucose levels

Characteristics of LIFE

7. Maintain Internal balance Homeostasis- maintaining internal

conditions Temperature Water content

Characteristics of LIFE

8. Evolution Occurs over time ( a LONG time) Over several generations Adaptations to better suit their

environment.

Characteristics of LIFE

Discussion groups!

Observations!

Class discussions

READ textbook pages 16-20 WRITE an argument explaining why a

plant is a living thing and a rock is not.

Use ALL 8 Characteristics of living things in the argument.