1) Monocots are shorts for “Monocotyledons” which means plants whose embryo has one cotyledon; whereas, Eudicots (Eudicotyledons) carry embryo with 2 cotyledons. The cotyledons of eudicots supply nutrients for seedlings, but the cotyledons of monocots store some nutrients and act as a transfer tissue for nutrients stored elsewhere. Five key features are typically used to distinguish monocots from eudicots; a seed, arrangement of vascular tissue in roots, stems, and leaves, and number of flower parts. The seed has the reproductive structures that are protected from drying out, have male and female gametophytes which are reduced in size. In young dicot stems and stems (usually the upright, vertical portion of a plant transports substances to and the leaves) that do not increase in thickness, xylem and phloem are arranged in vascular bundles in the cortex.
1-2-09 Glowing Bacteria Genes are pieces of DNA which hold the instructions for making proteins. The protein will then give an organism a particular trait. Genetic transformation means changes caused by genes, and requires the insertion of a gene into an organism, in order to change the trait. this technique is used by in many areas of biotechnology. Agriculturally, plants can be genetically transformed to be resistant to pesticides, spoilage, and frost.
Nitrogen fixing bacteria in the roots of leguminous plants reduce atmospheric nitrogen to ammonium using ATP and reduced NAD. The ammonium ions released into the soil are oxidised by nitrifying bacteria firstly to nitrite, and then to nitrate. This oxidation increases the nitrogen content in the soil which plants can use to produces many useful molecules including amino acids, proteins, DNA and ATP. The formation of these ions forms part of the ecological nitrogen cycle which plays a key role in sustaining life on this planet. Plants are the producers for an ecosystem.
| | | A) | provides a location for DNA production | | | B) | helps decrease surface area | | | C) | allows selective permeability of cell membrane | | | D) | facilitates breakdown of chemical bonds | | | | | | Feedback: The pleats and folds of the endoplasmic reticulum provides a large surface area where cellular functions, such as breaking chemical bonds, can take place. |
You will look at the bacteria through a microscope exposing the bacteria's cell wall to two types of stains: a violet and a red one. A bacterium with thicker cell walls is known as gram positive bacteria because it retains the first stain and does not absorb the second one, while a gram negative bacterium has a thinner cell wall and absorbs both. Gram positive bacteria are violet, while gram negative bacteria are pink. Characteristics to observe are: Bacteria are relatively simple single-celled unicellular organisms. Not enclosed in a special nuclear membrane.
I. Title: pGLO Transformation Lab II. Purpose; We want to be able to observe, comprehend and analyze genetic transformation as we genetically alter organisms. III. Hypothesis: If bacteria with + pGLO plasmids that are resistant to the antibiotic ampicillin and have the gene for GFP, colonies with survive and grow on the transformation plates that have LB/ amp.
Nitrogen balance studies have been used to determine protein needs. Describe the different nitrogen balances and examples of who may be at those balances. a. Equilibrium b. Negative c. Positive 12. a) What is deamination? b) How does the body handle the ammonia that results from that process?
3. Why is it necessary to make pure subcultures of organisms grown from clinical specimens? So that the organism can be identified and tested for antibiotic sensitivities. 4. What kinds of clinical specimens may yield a mixed flora in bacterial cultures?
Examples of fungi are Penicillium, yeast and mushrooms. Plants are multicellular and carry out photosynthesis. The cells are eukaryotic, have cell walls made of cellulose and vacuoles containing cell sap. Also, they have chloroplasts containing photosynthetic pigments. The main plant phyla include mosses, liverworts, ferns and conifers.
Bordetella pertussis Microbiology Bordetella pertussis is a prokaryotic organism belonging to the bacteria kingdom, the genus Bordetella, and species B.pertussis (Bauman, 2012). B. pertussis is a Gram negative coccobacillus (rod shaped) and is the causative agent of Whooping Cough. Microscopically, B. pertussis appears as pairs or singly, which are approximately 0.5-1.0um in length (Bauman, 2012). Encapsulated, non motile, and non spore forming these cells require a rich media in order to survive. B. pertussis bacteria are obligate aerobes requiring oxygen to live.