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Ch.2 It's Alive! LT

ch. 2 It's Alive! Or is it?

the smallest unit that can perform all life processes; they are covered by a membrane and have DNA and cytoplasm cell
anything that causes a reaction or change in an organism or any other part of an organism stimulus
the maintenance of a constant internal state in a changing environment homeostasis
reproduction in which the sex cells from 2 parents to unite producing off spring that share traits from both parents sexual reproduction
reproduction that does not involve the union of sex cells and in which one parent produces offspring identical to itself asexual reproduction
the passing of genetic traits from parent to offspring heredity
the sum of all chemical processes that occur in an organism metabolism
an organism that can make its own food by using energy from its surrounding producer
an organism that eats other organisms or organic matter consumer
decomposer an organism that gets energy by breaking down the remains of dead organisms or animal wastes and consuming or absorbing the nutrients
protein a molecule that is made of amino acids and that is needed to regulate processes in the body
carbohydrate a class of energy giving nutrients that include sugars, starches, and fiber contains carbon, hydrogen, and oxygen
lipid a type of biochemical that does not dissolve in water: facts and steroids are lipids
phospholipids a lipid that contains phosphorus and that is a structural component in cell membranes
ATP adenosine triphosphate, a molecule that acts as the main energy source for cell processes
nucleic acid a molecule made up of subunits called nucleotides
The sub units of nucleic acids are... nucleotides
The four basic needs of every organisms are... water, air, a place to live, and food
Cells of most living things are what percent water? 70%
What is the chemical process in which most living things use oxygen? releasing energy from food
How long can a human survive without water? 3 days
How does limited amount of space on earth affect organisms? Then they need to compete with eachother
what two things does food give organisms? They give energy and raw materials needed for life
How do organisms use the nutrients from food? They replace cells and build body parts.
A substance created when 2 or more atoms combine molecules
Molecules made up of different kinds of atoms are... compounds
Proteins that speed up chemical reactions enzymes
a protein found in red blood cells that attaches to oxygen hemoglobin
How do cells use carbohydrates? They use them as a source of energy and for food storage
Created by: ltdancer97