Living Organisms
Biotic?
refers to things that are considered to be living.
Microscope
Are devices that magnify tiny objects so they can be observed
Multicellular
An organism made up of many cells working together.
Permeable
Lets everything in
Specialized
A cell that’s built to do one specific job.
Abiotic?
refers to things that are considered to be non living.
Magnify
Is the process by which objects are made to appear larger than they actually are.
Unicellular
Organisms with only one kind of cell
Selectively Permeable
Lets certain things come In
Tissues
A group of similar cells that work together to do a specific job.
Cell?
the basic unit of life
What levels of magnification are possible for light and electron microscopes?
10x 40x 100x
Organelles
Basic structures inside of a cell that helps the cell do what it needs to do
Impermeable
It lets nothing go through
Why is there a need for humans to have approximately 100 different types of cells?
Humans need many types of cells because each type is built to do a different job that keeps the body alive.
What are the 5 characteristics of ALL living organisms?
Need energy to survive
Respond and adapt to their environment
Reproduce
Grow and develop
Produce waste products
What are two important points described by the “cell theory”?
All living things are made of one or more cells
Cells are the basic units of life
Nucleus
Often the most easily seen structure of a cell, The control center
Diffusion
Is that particles that are in a high concentration area spread apart into low concentration area
What are two disadvantages of unicellular organisms?
Unicellular organisms have only one cell to handle all life functions, and if that single cell is damaged, the entire organism dies.
What is the relationship between structure and function for living things?
The functions are the stuff that we do and structure are the thing that help us do them
Name two early scientists and what they each discovered with the use of their early microscopes.
Robert Hooke and Antonie van Leeuwenhoek
How does being small make a cell more efficient?
If cells were larger they would need a larger cell membrane in order to function, So each cell is the perfect size
Osmosis
The diffusion of water Through a selectively permeable membrane
Describe the relationship between tissues, organs and systems:
Tissues group together to form organs, and organs work together in systems to keep the body functioning.