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Ch. 4 and 5

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
Created by: areed1