Question | Answer |
What is the smallest unit that can perform all life processes | cell |
What is anything that causes a reaction or change in an organism or any part of an organism | stimulus |
the maintenance of a constant internal state in a changing enviroment | homeostasis |
sexual reproduction | reproduction in which the sex cells from two parent organisms unite, producing offspring that share traits from both parents |
asexual reproduction | reproduction that does not involve the union of sex cells and i whuch one parent produces ooffspring identical to itself |
What is the passing of genetic traits fom parent to offspring | heredity |
metabolism | the sum of all chemical processes that occur in an organism |
producer | an organism that can make its own food by using the energy from its surroundings |
consumer | an organism that eats other organisms or organic matter |
decomposer | an organism that gets energy by breaking down the remains of dead organisms or animal wastes and consuming or absorbing the nutrients |
proteins | molecule that is made up of amino acids and h is need to build and reapair body structres and to regulate processes in the body |
carbohydrate | class of energy giving nutrients that includes sugars, starches and fiber; contains carbon, hydrogen and oxygen |
lipid | type of biochemical that does not dissolve in water; fats and oils are lipids |
phospholipid | lipid that contains phosphorus and that is a structural component in cell membranes |
ATP | molecule that acts as the main energy source for cell processes |
nucleic acid | a molecule made up of subunits called nucleotides |
True or False: All living things are made up of cells | True |
Organisms must have food because | food is a source of energy |
Organisms strore energy in | lipids |
The subunits of nucleic acids are | nucleotides |
The sub units of proteins are | amino acids |
proteins that start or speed up chemical reactions in cells are | enzymes |
Why do all living things need air? | Becuase the need the gases in the air to perform chemical processesthat realease energy from food. |
What covers a cell? | a membrane |
What does a cell contain? | All materials necessary for life |
Why does an organism have to maintain stable internal conditions? | because if they dont they will die |
When you shiver or sweat your body is | trying to maintain a stable internal condition |
Most single cell organisms reproduce thorugh | asexual reproduction |
Most animal and plants reproduce through | sexual reproduction |
What does DNA do? | controls and structure and function of cells |
What do organisms pass on to their offspring? | copies of their DNA |
How does a single celled organism grow? | it grows by getting larger then it divides |
In addition to getting larger, living things also | develope and change |
What are four basic needs of every organism? | water, air, a place to live and food |
Cells of most living things are made of approximatelly, how much water? | 70% |
Most chemical reactions involved in metabolism require | water |
About how long can a human survive without water? | 3 days |
Air is a mixture of gases including, oxygen and | carbon dioxide |
What is a chemical process in which most living thing require oxygen? | releasing energy from food |
Green organisms convert energy from sunlight to energy stored in food during | photosynthesis |
What do organisms need in the place where they live? | All the things they need to survive |
What are 2 things food gives organisms? | energy and raw materials need to carry on life processes |
2 ways organisms use nutrients from food are | to replace cells and build body parts |
nutrients are made up of | molecules |
molecules made up of different kind of atoms are | compounds |
cells use carbohydrates as | a source of energy and for energy storage |
carbohydrates made of one sugar molecule or a few linked sugar molecules are called | simple carbohydrates |
a carbohhydarte made of hundreds of molecules linked together are | complex carbohydrates |