Week of 1/26/09

This weel in science, we reviewed the mitosis sheet and continued to learn about mitosis.

These are the steps of mitosis:

On friday we made a concept map of mitosis and took a quiz. The conceptual map looked like this:

week of the 18th

This week in science we took a test and talked about it. I thought that it was easy because I studied. We also did a lab on cell reproduction. We looked at a tip of a root and saw the cells midway in cell asexual reproduction.

On friday we did a simulation on mitosis. It was on how a reproductive cell has half the # of chromosomes so it can join with the other cell.

the week of 1/12

This week in science, we made a conceptual map of D.N.A, gene, protein, mRNA, tRNA, codon, amino acid and chromosome. We connected the terms to eachother and explained what they had to do with eachother.

Ex. Chromosomes>____made of coiled DNA___>DNA

We also talked about sexual and asexual reproduction. Cells reproduce asexually by doubling their Chromosomes and organells. We reproduce sexually by giving off sperm or egg to meet.

week of 1/5

This week we learned about cell respiration, D.N.A. transcription, microscopic picture of water and how energy is coverted thoughout the food chain.






For example:

Microscopic pix of water:

D.N.A. transcription is when the D.N.A. is copied to the m-RNA then brought to the rough ER. There, it is paired with t-RNA with amino acids attached to them and then relases the amino acid and floats off.

Cell respiration is when the glucose is exposed with oxygen in the mitochondria. After this happens CO2, energy and water is produced.

Why cant fish breath above water?

When I looked at this diagram of the inside of a fish I saw gills but not lungs. I also read that the gills are only designed to take the oxygen out of water and we cant filter water we just breathe in air.(The fish take the oxygen molocule of H2O). The fish don't take all the oxygen out of the water. They take only the oxygen molocules out of the water they took in. Then, they release CO2 in to the water and plants like seweed take it in and produce more oxygen for the fish to breath.

COOL PICTURE OF INSIDE OF A FISH HEAD!