chapter 6 (model of cells - the basic unit of life)

Question 1

show an understanding that typical plant and animal cells are models used to represent their various forms

Answer 1

show that you are able to pick out the differences from 2 cells [e.g. one cell has more chloroplasts than the other]

Question 2

explain the significance of the division of labour, even at the cellular level

Answer 2

definition : the breakdown of work into small, specific tasks for maximum efficiency
why is it important?
- it ensures that functions are carried out more efficiently and performed at the same time
cellular level :
- vacuole enables the plant cell to store water
- cell membrane regulates substances that enter and leave the cell

multiellular level :

• cells that have a specific function are grouped together [based on their similar functions] to form tissues
• different types of tissues that work together to form a function, form an organ
• several organs work together to perform a specialied purpose form an organ system

Question 3

cell organelles found in plant and animal cells

Answer 3

1) vacuole
- contains water and other nutrients needed for the cell/organism to live
2) nuclues
- controls cell activities
- repairs worn-out parts
- keeps cell alive
- contains chromosomes
3) chromosomes
- contains genes/ genetic material (DNA)
4) cell membrane
- partially permeable
- controls cells that enter and leave the cell
5) cytoplasm
- chemical reaction site
- gel-like

Question 4

cell organelles only found in plant cells

Answer 4

1) cell wall
- supports plant
- gives cell a regular shape
2) chloroplast
- contains green pigment [chlorophyll] that absorbs [light] energy from the sun, which is needed in photosynthesis