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.
Limonene, the chief component of orange oil, is widely used as a fragrance and flavoring, as well as a cleaning solvent. Limonene, a naturally occurring hydrocarbon, is a cyclic monoterpene, a class of natural products biosynthesized by the assembly of isoprene units into various structures. Many terpenes are responsible for the odors of plants like eucalyptus, pine, mint, lavender, rose, and others. Organic chemists use terpenes and other natural products as chiral starting materials for complex chemical syntheses or as inspirations for pharmaceuticals. Some natural products are attractive synthetic targets because of interesting or unusual structural features or medicinal applications.
They stain differently due to differences in the structure of their cell walls. Gram-positive bacteria stain purple because they retain the crystal violet dye after the alcohol and acetone wash of the Gram stain process. Gram-positive bacteria have very thick cell walls of which about 60%- 90% of the wall is peptidoglycan. They also have teichoic acids interwoven in the wall (Betsy, T., & Keogh, J. 2005).
Once you smell each substance, you will record what each substance smells like. When you smell the (+)-carvone, you will notice a woody type smell and with a little spice to it. When you smell the (-)-carvone, you will notice a sweet smell. Not only is it sweet, but it should have a vinegar like smell to it. When you smell caraway oil, you will get a moist wood type smell.
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?
6.05 HONORS Lab Report: Dichotomous Key Directions: Use the Dichotomous Key on my site as you carry out this lab. Read all of the instructions below carefully, and fill out the BLUE portions of this sheet. Objectives: After doing this lab activity, you should be able to: Identify bryophytes, pteridophytes, gymnosperms, and angiosperms. Describe the characteristics and classification of the four main plant divisions. Materials: Four plant samples Dichotomous key (a copy is found in the Module Help column at www.rechanek.com) This lab report Hypothesis: 25% Bryophyta 25% Pteridophyta 25% Gymnosperms 25% Angiosperms Procedure: Read all the instructions for this lab before you begin working!
The streak plate technique is done to isolate a colony formed by a single cell from a mixture containing millions of cells. The streak plate technique was also used to obtain pure cultures of the bacteria using a trypticase soy agar (TSA) plate and was incubated at 37 ̊ for 48 hours. Secondly a Gram stain was performed as directed from exercise 6in the lab manual (Kleyn 37) and was found to be Gram negative Rods. The Gram stain is important to do because it reveals the morphology of the organism and the arrangement of the cells; if an organism appears purple under a microscope then it is said to be Gram positive, and if it
READ THIS LAB BEFORE COMING TO CLASS. Introduction: In this lab exercise we will study the effects of an abiotic (non-living) factor on seed germination (the beginning of seed growth which is usually seen with emergence of a small white root). We will also be stressing the use of graphing skills. We will use a common seed available in grocery stores, red kidney beans. These plants do not live near the sea normally.
Flowers, dependent embryos, gametangia, vascular tissues, and seeds 87) The key step in adaptation of seed plants to dry land was the evolution of what? wind dispersed pollen 88) What are the two dominant types of seed plants? Conifers and angiosperms 89) What is the male organ in which pollen grains develop? Anther 90) What structure contains spores? A male sporangium 91) What is a stigma in a plant?
Avocado an introduction The tree from which the commercial avocado fruit (technically a berry due to the fact it develops from a single ovary and has the seed embedded in the fruit), come from the avocado tree Persea americana Mill which originates from Central America. The avocado is a nutritious fruit high in lipids particularly mono unsaturated which may help lower levels of cholesterol. Avocados are sources of fibre and fairly high levels of protein. It is a good source of Vitamins A, B3, B5, C and E and of the mineral potassium. For a more detailed breakdown of avocados see appendix 1.