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Science Unit 8 Test

QuestionAnswer
Homeostasis The ability of a cell or organism to stay alive despite potentially harmful or deadly changes happening in the outside environment.
Evolve When a breeding group of organisms (population) changes and better adapts to their environment from one generation to the next due to … 1. random genetic changes (mutations in DNA/RNA) 2. the process of natural selection.
How long has life been around? 3.7 BYA
What are the 10 characteristics of life? 1. Made of one or more cells 2. Made of carbon-based molecules(proteins, carbs, lipids, and nucleic acids) 3. Need water to survive 4. Energy 5. Grow and develop 6. Respond to stimuli 7. Maintain homeostasis 8. Reproduce 9. DNA/RnA 10. Evolve
Why is water essential for life? 1. Water fills up cells and gives cells shape and physical support from the inside. 2. Water-based fluids help transport molecules and nutrients within the cells and bodies of living things.
Roles of DNA vs. RNA Deoxyribonucleic acid - a double-stranded molecule that encodes an organism’s biological blueprint. Ribonucleic acid - a single-stranded molecule that decodes an organism’s biological blueprint.
How many human cells are in an average adult human? 30 trillion
How many bacterial cells are in an average adult human? 38 trillion
Average size of a eukaryotic cell 90 micrometers
Average size of a prokaryotic cell 1 micrometer
Organism Any living thing
Why is water essential for life? PT. 2 3. Water is great at dissolving chemical substances which makes it possible for life-sustaining chemical reactions to occur.
Created by: akashfs
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