Characteristics of life Flashcards
Bio (bios) meaning
Life
Logy (logus) meaning
the study of
Branches of science that studies all living things
Biology
Common characteristics that all Living Things share
- Order or organization
- Energy acquisition and release
- Reproduction
- Growth and Development
- Regulation or Homeostasis
- Sensitivity or response to the environment
- Evolution
The biological levels of organization of living things arranged from the simplest to most complex
Order or Organization
All living things need and use energy to live
Energy acquisition and release
All energy originally comes from _____?
Sun
All organism use a source of energy for their ________?
Metabolic activities
An organism that produces its own food
Autotroph
An organism that does not make its own food
Heterotroph
A process by which organism give rise to an offspring. It is necessary for the survival of a species.
Reproduction
_______ is defined as an increase in the number, size, and volume of cells
Growth
_______ is the emergence of specialized, morphologically different body parts
Development
________ is the ability of an organism to maintain its internal environment despite conditions in the external environment
Homeostasis
Anything that causes an organism to react is called ________
Stimuli
_____ refers to the body’s ability to detect a stimulus
Irritability
_____ refers to the body’s ability to respond and adjust to stimulus
Adaptability
It explains how many different kinds of organism came into existence. It also explains how modern organism are related to past organism
Evolution
Favorable characteristics are selected for and passed on to offspring called _____
Adaptation
It is driven by natural selection or “survival of the fittest”
Evolution
An ______ is a substance that cannot be broken down to other substances by ordinary chemical means.
Element
A ______ is a substance consisting of two or more different elements combined in a fixed ratio.
Compound
How many elements are essential to life
25 elements
These four elements are the main ingredient to biological molecules
Oxygen, Carbon, Hydrogen, Nitrogen
It is the smallest unit of matter than still retains the properties of an element
Atom
A subatomic particle with a single
positive electrical charge
Proton
A subatomic particle with a
single negative charge
Electron
Electrically neutral and has no charge
Neutron
Greek word meaning of atom
Indivisible
These four elements constitute about 96% of our body weight
Carbon, Hydrogen,
Nitrogen, and Oxygen
This refers to the formation of a chemical bond between two or more atoms, molecules or ions to give rise to a chemical compound.
Chemical bonding
4 major classes of biomolecules
Carbohydrates, Lipids, Proteins, Nucleic acid
Biologist call them ______ because they may consist of thousands of atoms
Macromolecules
It is a large molecule
consisting of many identical or similar building blocks strung together
Polymer
The building blocks of polymers are called
Monomers
How do cells form polymers from monomers
Through Dehydration reaction
The process which cells break polymer called
Hydrolysis
It is the basic unit, or monomer, of a
carbohydrate
Monosaccharide
_______ are macromolecules, polymers of
hundreds to thousands of
monosaccharides linked together by
dehydration reactions
Polysaccharides
Common types of polysaccharides
Starch, Glycogen, Cellulose
Are diverse compounds that are
grouped together because they share one trait: They do not mix well with water
Lipids
The fundamental structure of a lipid is comprised of what
Fatty acids and Glycerol molecule
A large lipid made up of triacylglycerol molecules; these molecules are composed of one glycerol and three fatty acids
Fat
The main function of fats
Long term energy storage
Fatty acids with no double bonds. They become solid at room temperature
Saturated fatty acids
Fatty acids that contain on or more double bonds, which cause “bends” in the carbon.
Unsaturated fatty acids
A type of lipid molecule that is the main component of the cell membrane.
Phospolipid
Are lipids in which the carbon skeleton contains four fused rings
Steroids
It is a polymer of amino acids; very large molecules with structural and metabolic functions.
Protein
Four levels of protein structure
Primary, Secondary, Tertiary, and Quaternary structure
A biological macromolecule which function to store genetic information and to express that information in the production of polypeptides.
Nucleic Acid
Are a single strand of nucleotides, whereas DNA is composed of two nucleotide strands that twist around each other.
RNA molecules
What is the structure of DNA called
Double Helix
Are the basic structural and functional unit of life
Cells
Known as the “English Father of Microscopy”
Robert Hooke (1635-1703)
Known as the “Father of Microscopy”. He discovered bacteria. He saw that blood cells differed between animals
Anton van Leeuwenhoek (1632-1723)
German Botanist that discovered that all plants were made of cells and contributed to the creation of the cell theory
Matthias Schleiden (1804-1881)
German Zoologist that concluded that are all animals are made of cells and contributed to the creation of the cell theory
Theodor Schwann (1810-1882)
A German pathologist that is known as the “Father of Pathology”. He discovered that all living cells come only from other living cells.
Rudolf Virchow (1821-1902)
General Attributes of the cell
- A cell can eat, grow, and move
- A cell can perform necessary maintenance, recycle parts, and dispose of wastes
- A cell can adapt to changes in its environment
- It can replicate itself
What are the two types of cells
Prokaryotic and Eukaryotic
It serves as storage for hereditary information (nucleus or nucleoids)
Deoxyribonucleic Acid (DNA)
A fluid surrounding the structures of the cell
Cytoplasm
Controls what goes in and out the cell
Plasma Membrane
Site of protein synthesis
Ribosome
It means “before nucleus”. Simplest organism and are very small. It has no membrane to bind its organelles
Prokaryotic cells
It contains organelles surrounded by membranes. It is found in most living organism
Eukaryotic Cell
Eu means _____, karyon refers to _____
True, Nucleus
It carry out genetic control of the cell
Nucleus and Ribosomes
Organelles involved in the manufacture, distribution, and breakdown of molecules
Endomembrane System
Energy processing organelles
Mitochondria and Chloroplasts
Provides structural support, movement, and communication between cells
Plasma membrane, cell wall, cytoskeleton