Gr. 8 Cells
Cell Theory
4.2 Postulates of the Cell Theory
Plant and Animal Cells
4.5 Plant and Animal Cells (Read and answer question 4 at the end of the text)
Plant vs. Animal Cell Labelling Sheet 1 (Make a copy and save to your Cells folder)
The Compound Microscope
4.3 – The Compound Microscope (Read and answer questions 2-5 at the end of the text)
Microscope Labelling Diagram Solutions
Comparing Plant & Animal Cells Lab
Lab sheet for students (make a copy for yourself) – Due Wed. October, 21
Microscope Cell Drawing Template
Advances in Microscopy
4.8 – Advances in Microscopy (Read and answer questions 2 – 6)
Add Mitochondria, Ribosomes, Endoplasmic reticulum, Golgi apparatus, and Lysosomes to your cell organelle and function study sheet.
Animal vs Plant Cell Labelling Sheet # 2 – (Organelle Parts and Function Quiz: Wednesday October, 28)
Solutions to Labelling Sheet # 2
More Solutions to Labelling Sheet # 2
Selectively Permeable Membranes
5.1 – The Cell Membrane (Answer questions #1-3 and add to your Cells folder)
Diffusion and Osmosis
5.2 – Diffusion (Answer questions #2, 4, 5 and add to your Cells folder)
5.3 – Osmosis and Turgor Pressure (Answer questions #2 & 3 and add it to your Cells folder)
Here is a presentation on Osmosis and Turgor Pressure that may help your understanding of concepts.
I realized that the screen went black on the last slide of the screencast. Here is the slide on Turgor Pressure to go along with the audio.
Cell Wars – Defending against invaders
Cell Wars Student Note link (Make a copy, add it to your Cells folder and answer questions #1-3)
Cell Systems
The Levels of Organization
Unicellular Organisms
Unicellular Organisms Defined:
Unicellular organisms are composed of a single cell, unlike multicellular organisms that are made of many cells. This means that they each live and carry out all of their life processes as one single cell. Most unicellular organisms are microscopic;
- Also called microorganisms or microbes since they are only visible under a microscope.
- The single cell is responsible for feeding, digestion, excretion and reproduction.
- Some microorganisms make us sick, but without the others we could not survive.
- The following are examples of unicellular organisms:
-
- Bacteria
- Protists
- Some Fungi
Multicellular Organisms Defined:
A tissue, organ or organism that is made up of many cells is said to be multicellular. Animals, plants, and fungi are multicellular organisms and often, there is specialization of different cells for various functions. In contrast, unicellular, or single-celled organisms are much smaller in size and less complex as they are composed of just one cell that senses its environment, gathers nutrients and reproduces asexually. The following are examples of multicellular organisms: human beings, organs and tissues, plants, animals, birds and insects.
~Generally speaking, we can say that unicellular and multicellular organisms are alike in that they exhibit all the functions of life, such as metabolism and reproduction, they contain DNA and RNA, they can exhibit a wide range of lifestyles, and they are essential to almost every ecosystem that we currently know of.
Amoeba, Euglena, Paramecium on the move
The paramecium are the larger protists, amoeba are the blob-like protists, and euglena are the smaller unicellular organisms.
Unit Review
Student Note Study Package (Make a copy for yourself to modify/print out)