1. 1-1 Notes – Cells & Life
Chapter 1, Lesson 1

2. Microscopes
Most cells can only be seen with a microscope.

3. Microscopes

4. Microscopes
Early microscopes include the light microscope, which uses light and has one or more lenses that enlarges an image of something.

5. Microscopes
Modern microscopes include electron microscopes, which can enlarge images 100,000 times or more.

6. Microscopes
Fly Foot

7. Microscopes
Spider

8. Microscopes
Pollen Grains

9. Microscopes
Moth Head

10. Microscopes
Flea

11. Microscopes
Ant

12. Cell Theory
Says three things:
All organisms are made of cells.

13. Cell Theory Says three things: All organisms are made of cells.
The cell is the smallest unit of life.

14. Cell Theory Says three things: All organisms are made of cells.
The cell is the smallest unit of life.
All new cells come from pre-existing cells.

15. Characteristics of Life
All organisms have common characteristics such as:
organization

16. Characteristics of Life
All organisms have common characteristics such as:
organization
responses

17. Characteristics of Life
All organisms have common characteristics such as:
organization
responses
growth and development

18. Characteristics of Life
All organisms have common characteristics such as:
organization
responses
growth and development
reproduction

19. Characteristics of Life
All organisms have common characteristics such as:
organization
responses
growth and development
reproduction
maintain homeostasis

20. Characteristics of Life
All organisms have common characteristics such as:
organization
responses
growth and development
reproduction
maintain homeostasis
use energy

21. Characteristics of Life
Organization means that all living things are organized with structures that each have their own function.

22. Characteristics of Life
Responses means that all living things are able to respond to changes in their environment.

23. Characteristics of Life
Growth and Development means that all living things grow and develop throughout their life time.

24. Characteristics of Life
Reproduction means that all living things came from another living thing, and can produce their own offspring.

25. Characteristics of Life
Maintain Homeostasis means that all living things can keep their internal conditions within certain limits.

26. Characteristics of Life
Use Energy means that all living things need energy to carry out their daily processes.

27. Chemistry of a Cell
The molecules in living things are made from these elements (SPONCH):
sulfur
potassium
oxygen
nitrogen
carbon
hydrogen

29. Chemistry of a Cell
96% of all living things is made up of hydrogen, oxygen, nitrogen, carbon (HONC).

30. Chemistry of a Cell
Living organisms obtain these elements from their environments.

31. Water The main ingredient Makes up 2/3 (66%) of our body mass
Inside cells and surrounds cells
Allows the transport of substances in the blood.

32. Water
Water molecules have negative and positive ends that attract each other.

33. Basic Substances in Cells
Macromolecules are LARGE molecules.
They are long chains of smaller units called monomers.

34. Basic Substances in Cells
The 4 kinds of macromolecules:
Proteins
Nucleic acids
Lipids
Carbohydrates

35. Proteins
Folded chains or groups of folded chains of monomers called amino acids

36. Nucleic Acids Long chains of monomers called nucleotides.
Two kinds: DNA and RNA

37. Lipids Do not dissolve in water
The main kinds are: fats, phospholipids, steroids, and waxes

38. Carbohydrates Made of one or more monomers called sugar molecules
Store energy
Make up the structural parts of cells

39. Where do new cells come from? A the food we eat B our parents
1.1 Cells and Life
Where do new cells come from?
A the food we eat
B our parents
C preexisting cells
D carbohydrates

40. Which is a characteristic of organisms? A birth B death C respiration
1.1 Cells and Life
Which is a characteristic of organisms?
A birth
B death
C respiration
D organization

41. How much of our body mass is water? A 90% B 75% C 66% D 30%
1.1 Cells and Life
How much of our body mass is water?
A 90%
B 75%
C 66%
D 30%

42. Which is not a macromolecule found in cells?
A water
B lipids
C proteins
D carbohydrates

43. What is DNA?
A a protein
B a nucleic acid
C a lipid
D a carbohydrate

44. Life and Cells 11:50