ORGANISMS -Living Things-
A tree, a cow, a mushroom.bacteria (microscopic), and a student in your class, are all organisms , that are both similar and different from each other. Living things are also different from nonliving things. Can you name some characteristics that are similar among all living things? Ok how about naming a few differences among them. Try to explain your answers.
What is life?
There is no agreement among scientists for a simple definition of life. All organisms share characteristics shown only by living things.
Characetisics of living things:
- All are organized structures – made of cells– that are the basic units of structure and function.
- All use energy to perform all life activities including growth and development.
- all organisms maintain
homeostasis– their internal environment, regardless of an unstable external .environment.
- All organisms reproduce by passing their (genetic) heredity information to new organisms (next generation )
- Nonliving things have no functioning cells and no metabolic processes.Reproduction and maintenance of homeostasis are not carried out.
The human gastrointestinal tract is made up of the following parts:
the stomach and intestine, sometimes including all the structures from the mouth to the anus. (The “digestive system” is a broader term that includes other structures, including the accessory organs of digestion.
For detailed information check the link below.(Wikipidea)
The you tube video will provide a visual tool to enhance your understanding of this system.
A final option is the power point presentation that outline the function & structure of the digestive system.
The scientific method is a set of steps that a scientist follow to solve a problem.
Essential elements of a scientific method are :
- Define a problem ( a question to answer)
- Hypothesis ( a possible answer to the problem
- Experiments (test the hypothesis)
- Collect,organize and interpret data.
- Make a conclusion.
For more information check the next link.
Guide to the Cell
You will really love to take a tour inside a cell. Cells are like small factories that are adapted to perform different jobs.You will take a fascinating journey inside a cell by reading this excellent article .
By Alisa Zapp Machalek
Click for larger image
Welcome! I hope the transformation wasn’t too alarming. You have shrunk down to about 3 millionths of your normal size. You are now about 0.5 micrometers tall (a micrometer is 1/1000 of a millimeter). But don’t worry, you’ll return to your normal size before you finish this chapter.
At this scale, a medium-sized human cell looks as long, high, and wide as a football field. But from where we are, you can’t see nearly that far. Clogging your view is a rich stew of molecules, fibers, and various cell structures called organelles. Like the internal organs in your body, organelles in the cell each have a unique biological role to play.
Now that your eyes have adjusted to the darkness, let’s explore, first-hand and up close, the amazing world inside a cell.
- Cell functions (avinash4ppl.wordpress.com)
- What do you study about an organism to learn about its metabolism ?
- With an example explain the term homeostasis .
- How can you define the term life?
- Put these terms in a complete sentence that explain their meaning. ( Cells, Organisms, Strucure, & function).
- Why do organisms reproduce?
Humans and the environment are in a dynamic interaction., that may lead to to drastic changes in both sides.Let us examine how humans improve their environment and protect it.
This is a very unique process that changes communities – in ecosystems – over time.This series of changes lead to the development of a stable or climax community.This gradual process is summarized by this power point presentation.
This power point presentation will take you in a journey though the amazing interactions among the biotic components of the. environment. specifically it discusses and explains the following concepts:
Pyramids of Energy and biomass.