Sunday, August 19, 2012

Rhizome


A Rhizome is a stem of a plant that is usually found underground and is capable of producing the root system of a new plant. This is a picture of a harvested ginger rhizome.

Parasitism


Parasitism is a type of non mutual relationship between organisms of different species where one organism, the parasite, benefits at the expense of the other, the host. In this example the bug that is eating the leaf is the parasite because he is getting the nutrient he needs from the leaf. While the leaf, which is the host, is being destroyed and dying.

Long-Day Plant


A long-day plant is exactly what it sounds like. It is a plant who doesn’t need a lot of darkness. These plants tend to thrive in the summer when the days are long. Lettuce is a Long-day plant. Other examples are wheat, barley, and turnips.

Heterotroph


Heterotrophs are organisms that can’t fix carbon and use organic carbon for growth. They cannot synthesize there own food and are dependent on complex organic substances for nutrition.

Genetically Modified Organism


The photo above is of two tomatoes, which have been genetically modified to last longer. An advantage is that the food does not rot and it makes the lives of farmers a lot easier. A disadvantage is that they used to have antibiotic resistance; the essence of the tomato gets changed.


Fermentation


Fermentation is the chemical breakdown of a substance by bacteria, yeasts, or other microorganisms, typically involving effervescence and the giving off of heat. The sugar in grapes ferments to become alcohol like in wine.

Eukaryote


Eukaryotes are organisms with a nucleus that contain their DNA in chromosomes. They consist of a cell or cells which is what characterizes a dog as a eukaryote. Other eukaryotes are plants, animals, fungi, and protists.