Stem Cells

First are the videos from today’s presentation:

After watching these videos go back to your notes and re-answer the questions from the “THINK!” section on another piece of paper. Then write a paragraph detailing the pros and cons of stem cell use and decide whether you are for or against their use and why (use evidence to explain why).

Plant Pollination and Reproduction

Don’t forget to finish your pollination readings/coloring packets. It is important that you understand how the flowers reflect the organism/wind that pollinates them.

This first video looks at plant pollination:

This next video includes a look at an unusual example with milkweed…

This video looks at bee orchids and pollination…

The last two videos are in more detail than you need to know, but look at angiosperm and gymnosperm reproduction.

Cell Specialization & Differentiation

Below are two links that look closer at Cell Specialization & Differentiation. The first from Khan Academy and the second from Bozeman Science.

I would like the emphasize the role structure or form plays in function and vice versa. As multicellular organisms evolve, their cells, tissues, organs, etc. become increasingly efficient at doing particular tasks and as such this specialization causes a direct link between form and function that shouldn’t be overlooked. It shouldn’t be too surprising that eukaryotes have many organelles and prokaryotes have fewer. Most eukaryotes are multicellular and most prokaryotes are unicellular.

Cell Specialization

Cell Specialization

Plant Transport

Here is a video reviewing the process of plant transport…

Make sure you know the three forces that allow plants to move water through the plant:

    Root Pressure (including Osmosis)

    Capillary Action


Typically this goes from root to leaf.

Nutrient flow (sugars) typically flow from leaves to roots. Gravity helps out here and the phloem moves materials from where they are made to areas of storage (called sinks).

In both cases materials are moving from HIGH concentration to LOW concentration (remember your concepts of diffusion)

Cell Structure & Organelles

This video clip is a visual introduction to cells and their importance in living systems. We actually know a decent amount about cells and that knowledge is ever increasing and expanding.

This video gives a tour of the cell and covers not only the organelles, but structure, types, and history of discovery.

This is a nice look at the structures of the cell and the functions that they perform.

This video uses the same idea that we are aiming for in our organelle pamphlete.

This is a fun video/Rap based on Jay-Z’s “Empire State of Mind.” Goes over cell structure.

The next two videos are from Crash Course and look at Plant and Animal Cells.

This final video is actually a student video and looks at the cell as a factory:

History of Cell Theory

The history of cell theory is a look at evolving thoughts and technology. This first video is a somewhat childish look at the discover of cells.

This second video really matches up nicely with what we covered in class. It covers cell theory, the two types of microscopes, and the two types of cells.

The complicated history of cell theory.

So here are the three tenants (or parts) of cell theory:

1. All living things are composed of cells.
2. The cell is the basic unit of structure and function.
3. All cells arise from pre-existing cells.

Specialized Tissues in Plants

The following videos do a good job outlining the different structures of the plant. The young man who is going over the structure pronounces structures very differently in some cases from what we have been using in class. Knowing all of the tissues will help you understand how they perform their specific functions. Tissues of note include: vascular tissue, dermal tissue, ground tissue, and meristematic tissue.