Characteristics of life notes review
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Ch. 1.1 Characteristics of Life
Transcript of Characteristics of life notes review
Ch. 1.1 Characteristics of Life
What characteristics do all living things share?
• Set up a concept map or foldable with 6 spots & enough space to include:
– Name of characteristic– Description– Pictures/examples
• Add titles for characteristics:1. Organization2. Growth & development3. Reproduction4. Response to stimuli5. Homeostasis6. Use of Energy
1. Organization• All living things have one or more cells. • Unicellular organisms (1 cell) have specialized
structures that function to help it survive.• Multicellular organisms (more than 1 cell) have
many types of specialized cells that are organized into groups based on their functions.
1. OrganizationExample
Organism
Organ System
Organ
Tissue
Cell
5 Levels of Organization
2. Growth & Development• Living things grow by increasing cell size
and/or increasing the number of cells.• Multicellular organisms develop, or change
over time.
3. Reproduction
• An organism can make one or more organisms through the process of reproduction, which is how a species survives.
3. Reproduction
• Cells dividing into 2 new cells
• Bird laying eggs• Pollinated
flowers making new seeds
4. Response to stimuli
• Living things adjust and respond to changes in their internal and external environments.– Stimuli = internal or external changes
(hunger, feeling cold, etc.)– Response = the reaction to the change
(eating, shivering, etc.
4. Response to Stimuli• Internal: feeling hungry and then eating• External: feeling hot and then sweating
5. Homeostasis
• Living things are able to maintain steady internal conditions (inside body), when outside environment changes.
• Stable internal environment
5. Homeostasis
• Keeping a body temperature of ~ 98.6○, regardless of weather
• Getting rid of excess fluids
6. Use of Energy
• Living things use energy for all the things they do.
• They get energy by producing it themselves, eating food, or absorbing food.
6. Use of energy• Plants get energy from the sun, animals get energy
from plants• Some don’t need sunlight for energy (deep in ocean)
Review questions
What term refers to things that have all the characteristics of life?
a. cellsb. unicellular organismsc. organismsd. multicellular organisms
What term refers to things that have all the characteristics of life?
a. cellsb. unicellular organismsc. organismsd. multicellular organisms
Which of these refers to changes in an organism’s environment?
a. External stimulib. Homeostasisc. Internal stimulid. Development
Which of these refers to changes in an organism’s environment?
a. External stimulib. Homeostasisc. Internal stimulid. Development
Homeostasis refers to an organism’s ability to maintain stable ______ conditions?
a. Externalb. Internalc. Cellulard. Environmental
Homeostasis refers to an organism’s ability to maintain stable ______ conditions?
a. Externalb. Internalc. Cellulard. Environmental
Which characteristic of life does this example refer to:
mosquito larvae changing into an adult mosquito?
a. Growth & developmentb. Organizationc. Reproductiond. Homeostasis
Which characteristic of life does this example refer to:
mosquito larvae changing into an adult mosquito?
a. Growth & developmentb. Organizationc. Reproductiond. Homeostasis
Which characteristic of life does this example refer to:
a bacterium dividing into 2 bacteria?a. Growth & developmentb. Organizationc. Reproductiond. Energy
Which characteristic of life does this example refer to:
a bacterium dividing into 2 bacteria?a. Growth & developmentb. Organizationc. Reproductiond. Energy
Which characteristic of life does this example refer to:
eating because you feel hungry?a. Response to stimulib. Organizationc. Reproductiond. Homeostasis
Which characteristic of life does this example refer to:
eating because you feel hungry?a. Response to stimulib. Organizationc. Reproductiond. Homeostasis
Which characteristic of life does this example refer to:
your body temperature staying the same?
a. Energyb. Response to stimulic. Reproductiond. Homeostasis
Which characteristic of life does this example refer to:
your body temperature staying the same?
a. Energyb. Response to stimulic. Reproductiond. Homeostasis
Which characteristic of life does this example refer to:
what you need for doing all activities?a. Growth & developmentb. Energyc. Reproductiond. Homeostasis
Which characteristic of life does this example refer to:
what you need for doing all activities?a. Growth & developmentb. Energyc. Reproductiond. Homeostasis
Which characteristic of life does this example refer to:
groups of cells working together as a tissue?
a. Growth & developmentb. Organizationc. Response to stimulid. Homeostasis
Which characteristic of life does this example refer to:
groups of cells working together as a tissue?
a. Growth & developmentb. Organizationc. Response to stimulid. Homeostasis
What kind of organism is a human?
a. Single-celled organismb. Multicellular organism
What kind of organism is a human?
a. Single-celled organismb. Multicellular organism
Which of the following is NOT an example of maintaining homeostasis?
a. Sweating when hotb. Getting a fever when sickc. Eating when your stomach growlsd. Eyes dilating when in the dark
Which of the following is NOT an example of maintaining homeostasis?
a. Sweating when hotb. Getting a fever when sickc. Eating when your stomach growlsd. Eyes dilating when in the dark
