Chapter 2 Review Packet- Answers

Chapter 2 Review Packet
Section: 6-_____
Section 2.1- Characteristic of Living Things
Metabolism- an organism’s metabolism is the total of all the
chemical activities that it performs.
Homeostasis-is the maintenance of a stable internal environment
Heredity-the transmission of characteristics from one generation to
the next
Stimulus-A change in an organism’s environment that affects the
activity of the organism
Asexual Reproduction-where a single parent produces offspring
that are identical to the parent. (plants, bacteria)
Sexual Reproduction-two parents produce offspring that share
characteristics of both parents. (humans, animals)
Cell-is a membrane covered structure that contains all of the
materials necessary for life. May be made up of 1 or more cells.
Organism- Any living thing. They can be made up of one or more
cells. Examples (humans, animals, plants, bacteria, etc.)
DNA is the molecule that contains information on how to make
List the 6 Characteristics of all living things:
1. Living things have cells
2. Living Things Sense and Respond to Change
3. Living Things Reproduce
4. Living Things Have DNA
5. Living Things Use Energy
6. Living Things Grow and Develop
List an example of a stimulus and a response to the stimulus.
1. Cold Weather
____ Response___________
1. Goose bumps
Section 2.2- The Simple Bare Necessities of Life
Producer-organisms that can produce their own food
Consumer-organisms that must eat (consume) other organisms to
get food.
Decomposer- organisms that get their food by breaking down the
nutrients in dead organisms or animal wastes.
Protein-are large molecules that are made up of smaller molecules
called amino acids. Life process of a cell involve proteins.
Phospholipid-type of lipid that makes up most of the cell
Lipids (fats and oils)- types of lipids that store energy
Starch- Plants store extra sugar as starch
 Carbs are used as a source of energy.
The cells of all living organisms are made up of 70% of water.
DNA provides instructions for making molecules called proteins.
Air is a mixture of oxygen and carbon dioxide. Humans breathe in
oxygen and plants take in carbon dioxide.
List the 4 needs of every living organism:
1. food
2. water
3. Shelter (a place to live)
4. Air