Here are some typical organisms (forms of life on Earth.)
Organisms are made of tissues
Tissues are made of cells
There are many types of tissues in animals, and in plants.
Cells are the basic unit of life.
A cell is the smallest unit that can truly be called living.
Most cells are so small that they can only be seen with a microscope.
We can see that inside cells there are smaller parts.
These are called organelles. They are tiny biological machines.
Each organelle has its own job. Examples include the nucleus, ribosome, mitochondria, Golgi, etc.
Let’s take a closer look at this.
Let’s look at what goes on inside a cell
Let’s look at single-celled organisms
How do cells reproduce?
Size and scale
Feb 2016 MCAS. Beginning with one parent cell, how many daughter cells are typically produced from one mitotic division?
A. 1 . B. 2 . C. 4 . D. 8
6.MS-LS1-1. Provide evidence that all organisms (unicellular and multicellular) are made of cells.
6.MS-LS1-2. Develop and use a model to describe how parts of cells contribute to the cellular functions of obtaining food, water, and other nutrients from its environment, disposing of wastes, and providing energy for cellular processes.
Disciplinary Core Idea Progression Matrix: LS1.A Structure and function
Grades 6-8: All living things are made up of cells. An organism can be made of one cell
(unicellular) or many cells (multicellular). Within cells, specialized structures are responsible for specific functions. In multicellular organisms, cells work together to form tissues and organs that are specialized for particular body functions.
Grades 9-10: Systems of specialized cells within organisms carry out essential functions of life. Any one system in an organism is made up of numerous parts. Feedback mechanisms maintain an organism’s internal conditions within certain limits and mediate behaviors.