1st 9 Weeks Midterm Study Guide Answers
Living Things and Cells
1. 4 Needs of Living Things: energy, water, living space,
stable internal conditions
2. 6 Common Characteristics: cells, DNA, use Energy,
respond to change (stimulus), reproduce, grow &
develop.
3. Response – reaction to a change in environment
Stimulus – a change in environment
4. Homeostasis – ability to maintain stable internal
conditions.
5. Growth: getting larger Develop: become
more complex (caterpillar to butterfly.)
6. Smallest unit of life: Cell
7. Scientist 1st discovered cells: Robert Hooke
8. Scientist discovered “animalcules”:
Anton von Leeuwenhoek
9. Cell Theory: All organisms are made of cells.
The cell is the basic unit of life.
All cells come from other cells.
10. Prokaryotic cell: no nucleus
Eukaryotic cell: has a nucleus
11. Multicellular: many cells Unicellular: 1 cell
12. Only 2 Prokaryotes: bacteria and archaea
13. Look at chart in notebook or cell booklet for
functions of cell parts.
14. Organelles in plants only:
cell wall, chloroplasts
15. Multicellular benefits:
longer life, larger size, specialization
16. Specialization: different types of cells do
different jobs for the organism
17. 4 levels of organization:
cell, tissue, organ, organ system
Example of Constructed Response
Answer
The organelle that Robert Hooke saw in the cork
plant that separated the cells was the cell wall.
He was not able to see separate animal cells
because they do not have cell walls and
microscopes were not strong enough to see
their cell membranes. As the information states,
it was not until 1835 when stronger microscopes
were available that scientists discovered that
animals also have cells. Cell membranes are not
as easy to see as cell walls.