Blog Post 7

  

     The lab that we did was about dissecting the Brassica flower and naming some of the plant's parts and what they do for the flower.  The dissection was easier then I thought and it was very interesting lab to do.
 
     This image shows of the stem in the microscope.  The stem is where water flows up and down the plant and where the muscle of the structure is.  The stem is more of the body of the plant because it is attached to the petals, stigma, and the roots.

                                                                     

     The top part of the image shows the stigma in the lens of the microscope.  The stigma is the part of the plant that produces the pollen.  

     The bottom part of the image shows the pistil in the microscope.  The pistil is where an ovary is fertilized by pollen which forms a zygote because each egg and pollen grain is a haploid gamete. Once they meet they combine their haploid cells to create a diploid zygote. In many plants, the embryo created by this process of fertilization is surrounded by a fleshy structure that is the ovary itself.

Assignment 7

This image shows the stigma of the Brassica flower we dissected. The stigma is located on the tip of the carpel or multiple fused carpels. This is where the plant's pollen is germinated. The stigma is connected to the reproductive organs (male, female, or male and female).

Under the stigma in the middle (only partially visible) is the stamen. The stamen is the plant's male reproductive organs. In the stamen is the stalk, the filament, and the end of the stalk, the anthers. The stamen helps in fertilizing the plant's pollen. The plant's sperm cells are stored in the stamen.

Shown in the picture is the plant's carpel. The carpel is the plant's female reproductive organs. The ovaries are stored in the carpel. Carpels are sometimes also topped by a stigma. The pollen from other plants sticks onto the stigma. The function of this structure is to transport the unfertilized pollen to the ovary as well as make sure the pollen is compatible with the ovules. The ovary cannot be seen in this picture, but it is connected at the base of the style. This structure is responsible for the production and housing of the ovules, or eggs.

Here is a picture of an ovary in our flower's pistil. Once an ovary is fertilized by pollen it forms a zygote. This is because each egg and pollen grain is a haploid gamete. Once they meet they combine their haploid cells to create a diploid zygote. In many plants, the embryo created by this process of fertilization is surrounded by a fleshy structure that is the ovary itself. This is commonly known as fruit. Fruit acts as a method of transportation for a plant's embryo.

This an image of pollen at 100x. Pollen contains sperm cells which, on reaching another flower's stigma, travels down the style into the ovaries where they can fertilize the female gametes (egg cells). Only one sperm cell can fertilize an egg cell. Once the egg is fertilized it creates a barrier around itself to shut it off from another sperms cells to avoid double fertilization, which could result in excess chromosomes.

Post 6

 To grow in biomass, our plant uses the energy it gained from photosynthesis. By creating ATP and releasing waste, cellular respiration is also an important part of our plants growth. Parent cells in our plant create sister cells by splitting, increasing the biomass of the plant by using mitosis.


Both enzymes that are made by the cell itself are PEPC and RuBisCo. The ribosomes in the cell translate a certain sequence of amino acids from genetic materials to make PEPC and RuBisCo. It then combines with other cofactors such as lipids and other materials found in proteins.

Blog Post 6

1.  Our plant grows in biomass by using photosynthesis to synthesis it's own food by carbon dioxide and water.  Photosynthesis is taken place in the green pigment chlorophyll and generates oxygen as a byproduct.  The ribosomes in the plant's structure creates proteins.  It also uses cellular respiration in it's process of growth by releasing waste and creating it's own energy.  Our plant also has the ability to divide itself by using the process of mitosis.

2.   The cells can make up enzymes by themselves, and they are used to process photosynthesis.  This allows them to turn the sunlight into the energy it needs.   The enzymes allow the plant to produce the ribosomes which create different kinds of proteins by amino acids and RNA.  Once the ribosomes and PEPC are done with this process, they then transformed in the Golgi.

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