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Similarities and Differences Among Living things (organisms).


 

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.
  • )https://youtu.be/30qOijooVBS7o
https://www.youtube.com/watch?v=30qOijVBS7o&feature=share

 

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Human gastrointestinal tract ( the digestive system)


The human gastrointestinal tract is made up of the following parts:

the stomach and intestine,[1] sometimes including all the structures from the mouth to the anus.[2] (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)

Click here for more information about the Gastrointestinal tract

The you tube video will provide a visual tool to enhance your understanding of this system.

[youtube http://www.

youtube.com/watching ?v=nM5kMSjBrmw&w=5

A final option is the power point presentation that outline the function  & structure of the digestive system.

The digestive system

 

 

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Scientific method #1


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.

Scientific method – Wikipedia, the free encyclopedia

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THE FEEDBACK MECHANISM


HI ALL, WE ARE GOING TO STUDY TOGETHER THE FEEDBACK MECHANISM, THE PROCESS THAT ALL LIVING THINGS USE TO KEEP A STABLE INTERNAL STATE. WITHOUT THIS PROCESS WE MIGHT GET SICK OR EVEN DIE. YOU WILL BE ABLE TO EXPLORE THIS PROCESS BY FOLLOWING the POWER POINT.

Topic: feedback mechanism (1) 

 

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INSIDE A CELL


 

 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

A typical animal cell, sliced open to reveal cross-sections of organelles.

A typical animal cell, sliced open to reveal cross-sections of organelles.
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.

Ecological Succession


Ecological succession:

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.

FOOD CHAIN


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:

Food Chain

Food Web

Pyramids of Energy and biomass.

ENERGY FLOW: Symbiotic Relationship


Organisms interact in an ecosystem as they get  food(energy) to survive. Explore this power point presentaion to learn about symbiotic relationships.  Microsoft Office presentation, powered by Office Online.

 

 

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