Investigating Pleurococcus
Plan
Pleurococcus is a green, single-celled algae that is found on the bark
of trees, where it survives better on the north side of the tree and
near the ground. It can also be found on stones and fences and usually
in moist situations. As it is a green plant, as all green plants do -
it photosynthesises.
The chemical reaction that is taking place is:
[IMAGE]
Carbon Dioxide + Water Glucose + Oxygen
light
[IMAGE]
Chlorophyll
[IMAGE]6CO2 + 6H2O C6H1206 + 6O2
[IMAGE]
Variables that affect Pleurococcus:
Ø Light: is required for photosynthesis
Ø Moisture/humidity: if it is too dry, the Pleurococcus will become
too dry and die out, as they are green plants and require
humidity/moisture to survive.
Ø Wind: It can transport moisture. However, it could bring about
drying out and death of the algae.
Ø Temperature
Ø Amount of rainfall that runs down the tree. If it is too much, it
washes off the Pleurococcus
These are called Abiotic Features.
Variables that are Biotic are:
Ø Position on the tree: leaves may cause dimness and branches may
change the local humidity conditions.
Ø Animals: birds and animals may remove the Pleurococcus.
Ø Tree species: each tree has its own rind category, some more
appropriate to the Pleurococcus than others.
Ø Location: the location of the tree will largely influence abiotic
factors (e.g. shadowing effects of other trees and disclosure to the
elements)
Ø Pleurococcus contains chlorophyll and has a single-cell. It expands
rapidly in warm and damp conditions by simple binary fission (ways of
how they actually come together/ join, like Miosis and Mitosis).
I have decided to investigate the effect of light upon the growth of
Pleurococcus.
My hypothesis is that the side of the tree with the least light will
have the most Pleurococcus, as too much light will make the
Pleurococcus dry out and die, as it has no roots, and the only
In this lab project, the microbiology students were given 2 unknown bacteria in a mixed broth each broth being numbered. The goal of this project is to determine the species of bacteria in the broth. They had to separate and isolate the bacteria from the mixed broth and ran numerous tests to identify the unknown bacteria. The significance of identifying an unknown bacteria is in a clinical setting. Determining the exact bacteria in order to prescribe the right treatment for the patient. This project is significant for a microbiology students because it gives necessary skills to them for future careers relating to clinical and research work.
Depending on the biomes, rainfall and soil can vary. However, the rainfall is typically ranges from 30 cm to 200 cm. In mountainous regions and forest biomes, there would be plenty of rainfall. While in the grasslands, there’s little rainfall. In the temperate zone, there are two main types of trees, coniferous and deciduous. The deciduous trees, in the South, drop their leaves in the winter. Generally, the trees are usually small in height unless in the forest areas. The forests tend to have wide leaves and tall, large trees. The soil in deciduous forests is found to be very fertile. The different amount of rainfall in the forest areas and the grasslands cause the difference between the trees and plant height. The rainfall in forest regions can lead them to be very common with the rainforests. Furthermore, the changes and variation of weather could be the reason as to why the forests shed or don’t shed their leaves. The leaves show a correlation between the fair amount of sunlight during the summer causing the leaves
that the tree will stretch and crack year after year to accommodate new growth. This resembles a rebirth of
These leaves will also have no threat of excessive transpiration because the temperature in the shaded area will be lower and the humidity probably higher. Transpiration is the removal (evaporation) of water from a plant through the stomata in the leaves; this water is removed in a cycle due to the active uptake from the roots. Transpiration involves osmosis; which is the diffusion of water from a high concentration to a lower concentration through a partially permeable membrane, until both the concentrations are equally saturated. All these factors i.e. transpiration and photosynthesis, come together to confirm my hypothesis. To support my hypothesis further, I did a pilot study in a meadow in which I studied the population of certain plant species in areas of
Redwoods were named for the color of their bark and heartwood. These trees have a high resistance to fungus and diseases due to the high tanin content in the wood. The dense, fibrous bark has an even higher content, and acts as an insulator from periodic fires which have plagued the countryside for centuries. Though these trees are immense, they have delicate foliage. The needles are narrow and sharp-pointed, and combine to form feathery sprays. The cones are an inch long and typically contain fourteen to twenty-four seeds. The older trees offspring sprout form their parents' roots in order to take advantage of the established root system.
According in Doc B it states, that ¨rainfall amounts by examining tree-ring patterns in the old cypress trees growing near Jamestown¨. ¨ Every year leaves a growth ring inside the trunk of the tree.¨ In my opinion, ¨the narrow ring usually means less rain¨. Due to lack of rainfall, 600ps were unable to grow adequately.
Legionella pneumophila GRAPH Introduction: Legionella pneumophila are gram-negative rods. They are very difficult to culture because of their complex nutrient requirements, such as cysteine, high concentrations of iron, and the use of activated charcoal agar. They survive as intracellular pathogens of either protozoa or human macrophages. They are most often found in stagnant water reservoirs like air conditioning cooling towers, whirlpool spas, humidifiers, faucets and shower heads, and are infectious when inhaled. L. pneumophila was first identified and named after the American Legion convention of 1976, held in Philadelphia, PA.
As a result of these factors, the flora has adapted to these conditions in a variety of ways including their shape, leaf type, root system, and color. One of the most prominent adapt...
which is the harvesting of some trees to open the canopy so the remaining trees can
The heavy rains (150 inches a year) are famous in the Pacific Northwest and have created a lush, mossy and primeval-looking forest of enormous trees. Generally on the western side of the park, there are several ways to ...
Once the reserves have been used the plant will die. This is what happens in plants that are not grown in sunlight. Etiolation is a phenomenon that occurs in plants not being grown in sunlight, whereby the stem of the plant rapidly elongates to increase the probability of the plant finding light. In order to carry out this etiolation the plant must use its food reserves, so if the plant does not find light having used these reserves, it will die. Planning: I am planning to do an experiment over 3 weeks to find out
In the last decade, the number of prescriptions for antibiotics has increases. Even though, antibiotics are helpful, an excess amount of antibiotics can be dangerous. Quite often antibiotics are wrongly prescribed to cure viruses when they are meant to target bacteria. Antibiotics are a type of medicine that is prone to kill microorganisms, or bacteria. By examining the PBS documentary Hunting the Nightmare Bacteria and the article “U.S. government taps GlaxoSmithKline for New Antibiotics” by Ben Hirschler as well as a few other articles can help depict the problem that is of doctors prescribing antibiotics wrongly or excessively, which can led to becoming harmful to the body.
A biofilm is a layer consisting of various combinations of many different organisms, autotrophic and heterotrophic. They are dense, organized communities of cells, encased in a self-produced slime. The bacteria grow together in water like atmospheres, attaching to a solid surface, forming a small ecosystem. Biofilms are known as a micro-environment, a micro-habitat, or a slime matrix. They help decompose dead organisms and recycle carbon and nutrients.
The strong cells wall prevents bursting. The cell is turgid. If plant cells lose water the cells become limp and flaccid. Water is essential for support in plants.
however it does not easily absorb green or yellow light, rather it. reflects it, this decreases the rate of photosynthesis. This can