Quiz on Chapter 1, Lesson 1 and Scientist’s Experiments Quiz Date: Wednesday, October 21 st

What are the characteristics of all living things? 1. Reproduction 2. Energy use 3. Homeostasis 4. Cellular organization 5. Growth and development 6. Respond to stimuli 7. Contains the chemicals of life 8. Have the ability to adapt to its environment

What are the 4 basic needs of living things? 1. Water 2. Internal stable conditions (homeostasis) 3. Energy 4. Living space

Describe Redi’s experiment Red meat Three jars: sealed, netting, and left open Flies appeared only on the jar left open Results: Meat does not produce flies. ***Life comes from life! (disproved spontaneous generation)

Describe Pasteur’s experiment Two different flasks with broth Straight neck flask (control) & swan neck flask Swan neck flask trapped tiny particles. Results: Cells do not arise in the sterile broth (disproved spontaneous generation)

Describe Miller & Urey’s experiment Recreated Early Earth: Water = oceans Gases = atmosphere (no oxygen) Electrical current = lightning Produced proteins that are the building blocks of life

3 characteristics of life forms Unicellular Lived in oceans Did not use oxygen

Compare and contrast earth’s atmosphere 3.6 billions of years ago Did not have oxygen Today Has oxygen

Autotroph Organism that makes its own food

Multicellular Organisms that are composed of many cells

Cell Basic unit of structure and function in an organism

Homeostasis Organism’s ability to maintain stable internal conditions

Unicellular Organism that is made up of only one cell

Reproduce Produce offspring that are similar to parents

Response Organisms react to a change in their surroundings

Stimulus Change in an organism’s surroundings that causes the organism to react

Growth Increase in the size of an organism

Heterotrophs Organisms that get their own food from another source

Organism Living thing

Development Ability for an organism to change so that it becomes more complex

Variable Factor in the experiment that is being changed

Control Part of the experiment that is maintained without change to provide comparison

Study tonight!