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.
The objective of this lab is to extract mitochondria from an etiolated Mung bean seedling in order to study the metabolic functions of the mitochondria. Writtin description: Table
Abstract Intraspecific and interspecific competition plays a major role in stabilizing environments. These mechanisms ensure that no species can go beyond its environments carrying capacity. The purpose of this lab is to determine the effects of density on biomass of plants and the effects of predators and abiotic factors in an environment. This will be tested with the spinach plant Spinacia vulgaris of varying densities in the same sized pots and with the use of P. aurelia, P. bursaria and P. caudatum divided into control and experimental groups. The results showed that the increasing of the density leads to a decrease in the biomass of plants and that the experimental groups are not much different than the control groups.
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.
Conclusion It was determined by comparing the positive and negative controls that chick peas are negative for glucose. However, beano was positive for cellulose. So when beano is combined with the chick peas, it breaks down the fiber in the chick peas. Causing the fiber to break down into digestible glucose. B.
This field, given by g=GMr2, (where g is the acceleration due to gravity or the gravitational field strength, G is he universal gravitational constant, M is the mass and r is the radius of the planet) acts on objects both on Earth and around it. g varies because the Earth is not a perfect sphere. * Explain that a change in gravitational potential energy is related to work done. * Gravitational potential energy is the energy of a mass due to its position within a gravitational field. When work is done on an object there is a corresponding change in kinetic and/or potential energy of the object.
Plant Structure. LEAVES: · Leaves are the plant organs where most photosynthesis occurs. Their broad flattened structure optimizes the surface area exposed to light. Plant morphologists have developed a hypothesis, supported by scientific evidence, that leaves are flattened stems between which tissue has developed. · The shape and structure of leaves vary considerably from species to species of plant, depending largely on their adaptation to climate and available light, but also to other factors such as grazing animals, available nutrients, and ecological competition from other plants.
I think this experiment will be a great eye opener for many people. Problem How does caffeine affect the growth of organisms? Hypothesis My hypothesis is that the caffeine will in fact stunt the growth of the mung bean plant. I believe this will happen because I have always been told not to drink too much caffeine because of the affect it has on the growth of organisms and the way it affects how hydrated and energetic people are. Brief Explanation This experiment will test the effect of caffeine on the growth of mung bean plants.
If a string is attached around the circular apparatus with a pulley with weight attached then it would normally fall at the rate of gravity (9.8 m/s^2). But the laws and principles of inertia from the platform, and along with mass attached would prevent this from happening. The inertia of the mass on the apparatus can be found through the acceleration of the hanging mass. As a result, there was little percent error in the values thus making the theoretical values to the masses correct. The theoretical value was .04 kgm^s as opposed to .0488 kgm^2 which yielded a -22% error as shown in the data.
Genetically modified foods are plants that have had their genetic characteristics altered. 2. What foods can be created by genetic modification? Sweet corn, rice, tomatoes, rape plants, and animals 3. Name 4 examples of genetically modified crops.