2A Cells

Question 1

What are living things?

Answer 1

• Meet the 8 criteria MRS GREEN
• Function according to the cell theory

Question 2

MRS GREEN

Answer 2

1. Movement
   - Capable of self-generating movement
2. Respiration
   - Extract energy through biochemical processes
3. Sensitivity
   - Sense + react to stimuli
4. Growth
   - Grow + develop over time
5. Reproduction
   - Produce new living things
6. Equilibrium
   - Maintain homeostasis to tolerate environmental change
7. Excretion
   - Produce wastes that must be removed
8. Nutrition
   - Extract nutrients to grow + maintain equilibrium + produce cellular energy

Question 3

Cell Theory

Answer 3

1. All living things are made up of cells
   2 cells are the smallest and most basic units of life
   3 All cells come from pre-existing cells.
   Figure

Question 4

Compare Prokaryotes and Eukaryotes

Answer 4

1. Membrane bound-organelles

Eukaryotes have whereas Prokaryotes don’t have

2. DNA organisation

Eukaryotes have Linear DNA whereas Prokaryotes have Circular DNA

3. Organism nature

Eukaryotes can be either unicellular or multicellular whereas Prokaryotes can only be unicellular

4. Size

Eukaryotes are larger than prokaryotes

5. Method of cell replication

Eukaryotes use mitosis and meiosis whereas Prokaryotes use binary fission

Eukaryotic organisms:

1. Animalia
2. Fungi
3. Plantae
4. Protista

Prokaryotic organisms:

1. Archaea
2. Bacteria