Petri dish

An Investigation of the Effects of Cytokinins during the Germination of Brassica rapa Seeds Germination is a vital stage in a plants life, but it also plays a significant role in other animals’ (including humans) life cycle. It is the process in which a new plant grows from a seed. Due to the fact that plants are autotrophs; they use the process of photosynthesis to transform sunlight and make their own food. Germination occurs in gymnosperms and angiosperms when the seed is using its own…

Henrietta Lacks was born 97 years ago on August 1, 1920 in Virginia. She was born into a very poor household and with 8 siblings. Henrietta’s mother, Eliza Pleasant, died when Henrietta was only 4 years of age during childbirth. After her mother’s unexpected death, her father moved the children to Clover, VA. Henrietta worked on her grandfather’s tobacco farm growing up. Henrietta at the age of 14 had her first child with her cousin, David. She later married David when she was 20 years old. The…

Lots of things happen by accident, but has anything extraordinary come out of them? Well a scientist named Alexander Fleming left his lab messy. Only to come back to moldy petri dishes. But one containing the miracle that saved thousands, penicillin. From that lucky experience would come years of history, well being, and the general study of the discovery of penicillin. Penicillin is one of the earliest discovered and used medicine. Originally the Penicillium mold, the mold that…

opened a petri dish and smeared the swab across the surface of the agar several times. Once the bacteria was on the agar, we closed the lid immediately, hoping to prevent microorganisms in the air from contaminating our sample. We also collected a sample from the skin of a lab member, and another from the microorganisms in the air. Once our samples were placed in the agar,…

Germination is the process by which a plant grows out from a seed. The most common example is the sprouting from a seed of an angiosperm, a flowering plant, or a gymnosperm that are seed-bearing plants. For a seed to germinate, few external conditions are in need to be met as well as internal conditions of the seed such as its dormancy, viability and its vitality to sprout. When these internal conditions are met, the external conditions at the time of seed germination plays a big role. First of…

Which Food Does the Plasmodial SlimeMold, Physarum sp. Prefer to Eat.Introduction: Physarum polycephalum is a slime mold that inhabits shady, cool,moist areas, such as decaying leaves and logs. Like slime molds in general, it issensitive to light; in particular, light can repel the slime mold and be a factor intriggering spore growth. Scientists called to the scene, however, put any fears ofmenacing goo or alien creatures to rest by identifying the mass as an unusually large(46 centimeters or…

If it produced sperm we could dry it and place it onto a petri dish. Once we collected the eggs we washed them with ASW twice. The eggs were transferred into a 50 ml falcon tube. We let it settle in the bottom then the removed ASW and added fresh ASW and resuspend it twice. The concentration of the eggs was altered to .1%. egg solution was added to a petri dish. 3 petri dishes were made, .5% ethanol, 2% ethanol, and a control group. Each dish contained 20 ml of ASW and .5 ml of egg and sperm.…

biology class, we researched about how many germs are at the tip of our finger tips by simply tapping a petri dish with the tip of our fingers. Then, we would let the bacteria grow for about two weeks by keeping them at a warm, ideal temperature. At the end of the two weeks, the petri dish was black in the middle section as if someone had colored it with a permanent marker. This simple petri dish captivated me to study pathogens and…

length of roots. The plants were positioned in their correct number bag. Petri dishes were labeled L 1-15 and the diameter of the dishes was recorded. The Lemna sp. was spun in the salad spinner ten times. The surface of the petri dish was filled with Lemna sp., and each plant mass was assigned a number. Wet weight, leaf length and width of five leaves on each mass was recorded for Lemna sp. These masses were returned to the petri dishes. Sandwich bags were labeled CON 1-15, EC 1-15, and L 1-15…

For many years initially in the 1980’s as the result of air pollution the concern of acid rain came to great attention. Even though there were procedures in order to reduce these emissions we are still facing the effects today. As you already may know, the major release of this air pollution is because sadfof the burning of fossil fuels alongside all the chemicals produced with it. Car exhausts burn petrol and the smoke that is released doesn’t just simply disappear and the sooty grey particles…