Do Now 1.Get out your pineapple lab, Enzyme HW & Catalyst Data Analysis 2.Turn in your enzyme modeling (if you haven’t yet) 3. Draw and label a picture of the enzyme-substrate complex.

Characteristics of Life

1. Living things are made up of cells

A cell is the basic building block of all living things

Organisms can be UNICELLULAR or made up of one cell

Organisms can be MULTICELLULAR or made up of MANY cells Circles = Cells

2. Living things reproduce

Type of Reproduction: Asexual One parent “Grows” an identical offspring When offspring is developed, it separates from parent Genetically IDENTICAL

Type of Reproduction: Sexual Two parents A parent contributes sperm and the other an egg; fertilization creates a new offspring with DNA from both parents Genetically DIFFERENT

3. Living things have DNA

What is DNA? It is an organisms genetic make-up OR a genetic blueprint with the directions for the traits (characteristics) that make all organisms unique.

4. Living things grow and…..

…… Develop

What is the difference between growth and development? Growth is the increase in size of an organism Ewwwwww….

Development is a transformation (change) into a different stage often for improvement

5. Living things obtain materials (food) to make energy

What is metabolism? All chemical changes that take place in a cell or an organism to produce energy and basic materials needed for important life processes

Organism can feed using two methods: Autotroph Organisms make their own food in their cells - automatically

Organism can feed using two methods: Heterotroph Organisms cannot make their own food in their cells – need to eat/consume

6. Living things respond to stimuli in their environment When you touch a hot stove, you pull your hand away pretty quickly. IT HURTS!

External Stimulus A stimulus that occurs OUTSIDE of an organism that causes a response; For example – a dog with a shock collar.

Internal Stimulus A stimulus that occurs inside of an organism. For example, if you have hunger pains, you eat!

7. Living things maintain a stable internal environment Organism maintain a constant/stabl e internal environment For example: Our bodies react when too cold or hot

What is homeostasis? The process of keeping the internal environment of the body stable while the outside world changes

8. Living things can adapt to their environment Organisms have the ability to change over a period of time in response to the environment. The BEST adapted will survive and pass traits on to offspring