Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
21 Cards in this Set
- Front
- Back
|
What do all living things have?
|
All living things have cellular organization, contain similar chemicals, use energy, respond to their surroundings, grow and develop, and reproduce.
|
|
|
What is a cell?
|
A cell is the basic unit of structure and function in an organism.
|
|
|
Unicellular
|
Unicellular is a single-celled organism. Bacteria is a single-celled organism and is the most numerous organism on Earth.
|
|
|
Multicellular
|
Multicellular organisms are composed of many cells that are specialized to do certain task.
|
|
|
Cells of all living things are composed of what?
|
chemicals
|
|
|
What is the most abundant chemical in a cell?
|
water
|
|
|
What chemical is the cell's main source of energy?
|
carbohydrates
|
|
|
What two chemicals are the main building materials of cells?
|
proteins and lipids
|
|
|
What are the genetic materials and chemical instructions that direct cell activities?
|
nucleic acid
|
|
|
Define stimulus
|
A change in organism's surrounding that causes the organism to react. For example, when a plant bends toward light.
Stimuli include changes in temperature, light, sound and other factors. |
|
|
Define response
|
An organisms reaction to a stimulus or change in behavior.
|
|
|
What do all living things come from?
|
All living things come from other living things by reproduction.
|
|
|
What was Redi's experiment about?
|
Redi tested rather flies came from spoiled meat or from other flies that layed eggs in the spoiled meat.
He put meat in two jars. One jar he covered so that no flies could get to the meat. He left the other jar uncovered. Flies were only found in the uncovered jar. |
|
|
What was Pasteur's experiment about?
|
Pasteur's experiment proved bacteria only came from other bacteria.
He put broth in two flasks and curved the top so new bacteria could not get in. He boiled the broth to kill the bacteria in one of the flasks. Bacteria only grew in the broth that was not boiled. |
|
|
What are the basic needs of all living things?
|
All living things needs water, food, space and stable internal conditions.
|
|
|
How long can most organisms live with out water?
|
a few days
|
|
|
What are autotrophs?
|
Autotrophs are organisms that their own food. For example a plant makes it own food from the sun using photosynthesis.
|
|
|
What are a heterotrophs?
|
Heterotrophs are organisms that can not make their own food.
|
|
|
Some organisms compete for space to live.
|
Animals and trees sometimes compete for space. For example, trees may compete with each other for sun light or the roots may compete for water.
|
|
|
What is it called when an organisms keep the conditions inside their body stable?
|
This is called homeostasis.
|
|
|
What is homeostasis?
|
Homeostasis is the maintenance of stable internal conditions. The conditions have to be kept stable so that cells can function.
|
