Biology and ecology Articles
The Respiratory System - ...he process of
producing ATP within the mitochondria of cells.) The following gas exchange mechanisms are
found in animals:
1. Dire...
The Endocrine System - ... of hormones can have significant influence on target cells.
3. Hormones may be steroids, peptides, or modified amino acids.
Through the...
The Immune System - ...us membranes provide a nonspecific first line of defense against invaders
entering through the skin or through openings into the body...
The Nervous System - ...>is typically a long, slender extension of the cell body that sends nerve impulses.
A nerve impulse begins at the tips of the dendrite bran...
Thermoregulation - ...ans,
reptiles, and fish. Because many of these animals may feel cold to the touch they
are called “cold-blooded” animals, but many...
Animal Movement - ...• When a log or rock is lifted, animals will suddenly scurry about. These movements
are kineses in response to light, touch, air tempera...
Transport of Sugars - ...be members by
active transport. This develops a concentration of solutes (dissolved substances, sugars in
this case) in the sieve-tube membe...
Kinds of Animal Behavior - ...e original intent of the behavior can no longer be fulfilled.
• When a graylag goose sees an egg outside her nest, she will methodically...
Embryonic Development - ... expects you to know features of only the first two developmental stages, gametogenesis
and embryonic development. Gametogenesis was previously ...
Ecological Succession - ... all living organisms) increase. Eventually, a final successional stage of constant species
composition, called the climax community, is a...
The Muscular System - ... the muscle cell, contains calcium-storing sarcoplasmic
reticulum, the specialized endoplasmic reticulum of a muscle cell.
...
Human Population Growth - ...to one of agriculture. In the last hundred years,
food output from agriculture was increased as a result of technological advances made
durin...
Transport of Water - ...ells.
2. Water moves from one cell to another through the symplast, or “living” portion of cells.
In this path...
Biogeochemical Cycles - ...
to the environment (release).
1. Hydrologic cycle (water cycle).
• Reservoirs: oceans, air (as water ...
Biomes - ... characterized by high temperature and heavy rainfall. The vegetation
consists predominately of tall trees that branch only at their tops, formin...
Life of Rocks - ... ice and gravity.
Weathering are of two types:
Mechanical or Physical Weathering.
By physical weathering, rocks are mechanic...
Human Impact on the Biosphere - ... fuels and forests increases CO2 in the atmosphere.
Increases in CO2 cause more heat to be trapped in the earth’s atmosphere. As a result,
...
Where are the Bees Going - ...exas, they have seen a fall of numbers up to a rate of 60%. California has seen bee colonies drop off from 30 to 60 %, plants depend on bees to polli...
Decatur CleanUp in High Demand - ... from water damaged walls, carpeting and hard wood flooring to the rapid growth of mold is dampening water damage repair. In some areas crews simply a...
Alternative Green Energy - ...ronment and many species of animals that are being affected by it.
The transition will not be easy, nor will it be cheap since Alternative Gre...
Use Solar Energy for your RV - ...about investing in installing solar panels for your RV. Many people stay away from installing solar panels because they believe its goi...
How to recycle your old computer - ...outdated electronics are been stored or incorrectly disposed of, and if they where to be recycled, the savings in resources and the enviroment would b...
Go Green! Use Environmental Paper - ...es all over the world. One way to become more environmentally friendly is to reduce your carbon footprint. Reducing your carbon footprint for your hom...
Threats from Global Warming - ...and natural energy to earth is sun. Almost half of the sun's energy in rays is absorbed by earth's surface. Earth in return, radiates back this energ...
5 Ways to Stop Global Warming at Home - ...ternal factors like volcanic eruptions, greenhouse gas and variations in earth's orbit. When these warming effects result in more warming around the s...
Go Paperless. Go Green. - ... cannot afford to lack behind their peers, they need tools to stay in the race. Therefore, the emergence of digital signatures has proved to be a savi...
Carbon emission - ...evels of carbon help in bringing clean energy to us and that helps in bringing to us a soothing and clean environment. Environment as such is really i...
Germany powering up with solar cells - ...or often spring to mind. Germany usually does not, but few countries have been as quick to embrace the renewable energy provided by the sun as this E...
Clean Coal to Power - ...icularly coal, will therefore remain important in order to secure global energy supplies. Given the fact that changes in the climate are already takin...
Latest "Biology and ecology" Articles
Page# 1 2 (last added articles shown first)
India Names Three Sites Which Will Be Used To Reintroduce Cheetahs (08/12/2010)
(...) A consensus was reached at this meeting for conducting a detailed survey in selected sites to explore the potential of reintroducing the cheetah in India."
His views where echoed by the Minister of State for Environment and Forests as Shri Jairam Ramesh said; "It is important to bring cheetah back to our country. Cheetah have not been seen since 1967 in India. (...)
Renewable Energy Sources: Why They are Still Not in Wide Use (08/06/2010)
(...) Renewable energy sources in contrast suffer lack of subsidies, and supporting regulations and policies. For example permitting process for them is much more complex and time consuming then its really needed (although they're safe in contrast with fossil fuels).
Lack of customers awareness makes it easy for oil consortiums to control the market. (...)
DEFINITION OF ECOLOGY AND ECOLOGISM (07/03/2010)
(...)
The word ecology is widely used today in the normative sense, not in the biological sense. The science of ecology is one that considers energy flows within a closed system. The normative sense of the word has come to mean the belief that severe or drastic change within that system, or indeed any change which can damage any species within it, or that disturbs the system, is seen as wrong. (...)
THE ORIGINS OF THE WORD ECOLOGY (07/03/2010)
(...) Haeckel's use of the term was as a descriptive tool. It is still so used today, for example, in studies of the ecology of plants and streams, or the ecology of plants in afield. Ironically, Haeckel himself did not fully develop his own invention for his own discipline. (...)
THE GREENS IN GERMANY (07/03/2010)
(...) Where had late capitalist society gone wrong, to be so criticised? The theory of marginality was produced. The functional logic of late capitalist society, argued academics, alienated certain marginal groups; the physically handicapped, the mentally handicapped, the unemployed and - the ecologists. 16 However, far from being a marginal part of German society, the new ecologists represented its most secure and comfortable section, the middle-class Beamten; the schoolteachers and civil servants who made up the majority of the alternative supporters. (...)
Buying Guide To Green Computers or Environmental Friendly Computers (04/27/2010)
(...) gov features a vast amount of information with regards to green computers. The featured green computers all have a great level of efficiency in terms of energy. This site allows you to choose the type of computer system that you would like and then you can get information of the product type and efficiency levels. (...)
Clean Coal to Power (04/21/2010)
(...) With a total annual consumption of around 40 quadrillion BTU (British Thermal Units) of coal, these three countries are the leading coal producers and consumers in the developing world. Realising that the existing power base is dominated by coal and the fact that many new coal based power facilities will be built in the coming decades, the impact of clean coal technologies will be significant.
Numerous clean coal technologies have been introduced worldwide yet there are still only a few which can currently find support under the CDM. (...)
Preserve the environment through energy proficient products and practices (04/16/2010)
(...) The savings from keeping lights out in untouched rooms will not be immense , but it will add up so commence reminding yourself and your family to turn out the lights.
Another big way to salvage energy in your lodgings is to shorten the total your air conditioner or heating unit cycles on and off during the day. You may be saying how do I abate the number of cycles that my air conditioning or heating unit makes? It is a lot easier than you suppose . (...)
Germany powering up with solar cells (03/03/2010)
(...) Any entity that actively supplies and distributes electricity to the grid is considered tied-in. At the beginning of 2006, 88% of the European Union's grid-tied electrical applications were located in Germany. Further illustrating Germany's promotion of gathering renewable energy with solar cells, the country saw a 110% increase of photovoltaic installations in one year between 2007 and 2008. (...)
Wind Turbine Power Is A Possible Option For Fulfilling Renewable Electricity Requests (02/15/2010)
(...) A lot of folks are moving away from the conventional electric grids, as well as fossil energy sources, for their individual motives. These often include things like the hope for deeper independence, as well as the need to live life remotely or perhaps in the country, and continue to have use of all the current home appliances we love. Political issues, including concerns of terrorist bombings of oil fields or power grids, also motivates a number of individuals to go green. (...)
Buying and Using Environment Friendly Products (02/11/2010)
(...) Plastic products are not bio degradable and hence not a healthy option. They can't mix into the earth's soil which makes them remain as they are which has caused lot of difficulties for the marine life especially.
Eco products or green products have one main advantage over plastic products. (...)
Carbon emission (02/07/2010)
(...) One of the best options to go with would be to invest in carbon footprints so that the money that comes with this act goes into projects that are concerned and attached to causes like this. Start off with yourself and your family and if all do so, someday there will be families who be part of this cause and that is when we all would state that the change that we had stood for is progressing and heading in the right direction.
They have been various industries and other organizations that have taken up the initiative to reduce the metric ton which is associated with carbon emission. (...)
Go Paperless. Go Green. (02/04/2010)
(...) So by going paperless, businesses are not only contributing to their 'commercial' cause, but to the social cause also. Globally laws have been made to make digital signatures and digitally signed documents legally valid. This legal status of digital signatures has enabled governments to shift to paperless environment, reducing response time and maintain process transparency. (...)
Threats from Global Warming (12/28/2009)
(...)
Global warming is the increase in the temperature of earth and its surface all across. The main contributor of carbon dioxide in atmosphere is power plants. These power plants burn fossil fuels and coal to generate power. (...)
5 Ways to Stop Global Warming at Home (12/28/2009)
(...) Below mentioned are the ways by which we can actually fight Global Warming Problem:
Way 1: Use compact fluorescent Bulbs: By using fluorescent bulbs, not just we will save money as they have much longer life than the basic light bulbs; we will also save power and can stop some portion of the carbon dioxide emission in the atmosphere.
Way 2: Use recycled paper & cloth bag: Try and always use only recycled paper as this will save trees from getting cut down. This will not just avoid release of gases in atmosphere as if not recycled; the paper will be burnt, but also will save the trees. (...)
Go Green! Use Environmental Paper (12/23/2009)
(...) One benefit of using environmental paper is helping to preserve forests because the demand for wood is reduced.
Recycled Paper Products for the Home: If you are a homeowner interested in helping the environment, recycled paper products are a good place to start. Recycled paper cups and dinnerware are an eco-friendly way of using everyday household products that can lower your impact on the earth. (...)
Renewable energy providing maximum benefits (12/09/2009)
(...)
Additionally, may the usage of Solar heating panel at your home be the perfect idea. These panels are helpful in maintaining the overall energy usage of your home and lower your monthly electricity bill. Moreover, you can also opt for a Solar Heating Device outside your home area so that you are less dependent on heating oil, gas or electricity. (...)
How to recycle your old computer (11/29/2009)
(...) You dont want the parts to be landfill or sent overseas to countries that dont dispose of them in an ecoligally friendly way.Before sending your computer for recycling or for donation, make sure that the data on your hard drive is completely and securly removed, S&D computers will securly remove and clean your hard drive for re-use, or environmentally dispose of the hard drive after completely destroying all data.contact S&D Computers at http://www. (...)
Global Freight Forwarding :: Taking a More Environmental Approach (11/24/2009)
(...)
The first and most basic way to improve the level of gases being emitted by transport vehicles is to use greener fuel sources. Right now the easiest switch to make in this regard is to rely on vehicles that run on unleaded petrol rather than more expensive and dirtier diesel. In the future, perhaps hydrogen fuel or electric cars will be powerful enough to be the fuel source for global freight forwarding. (...)
Eco friendly Moving Company: A Completely Toxin Free Move (11/23/2009)
(...) This is not only a method of making your move Eco-friendly but also a way to save some unnecessary out-of-pocket expenditure. Stop shopping before your move. Otherwise you will have to make extra packing. (...)
Use Solar Energy for your RV (11/19/2009)
(...) With the gas prices steadily rising, you could save so much more money by switching to PV systems. When you have solar panels for your RV, you can see that you can go farther and stay out longer on the road. Even if you are at your campsite already, you can use your stereo, microwaves, TVs and even the lights a lot longer without feeling like you need to conserve energy. (...)
Alternative Green Energy (11/16/2009)
(...)
If it's that easy, you may ask, then why doesn't this become the norm already? Well the answer is simple: money. Oil companies have their money in the pockets of many politicians who then spin their own views, doing their best to make sure that the oil companies get their money, so that they, the politicians, can get their cut of the pie. There is a simple way of stopping this of course. (...)
The Difference Between FSC Certified and Recycled Paper (11/07/2009)
(...)
So which one is better? There is a lot of debate about this in the paper industry. Paper made directly from trees still requires the trees be cut down, (although they are replanted). Large tractors and logging machinery are used, adding pollution and noise to the surrounding environments, as well as chemicals and water waste used in the paper-making process. (...)
Decatur CleanUp in High Demand (10/22/2009)
(...) Especially in relatively warm weather, high humidity levels can also result in mold or mildew growth in as little as 24-48 hours. It is essential to use industrial, commercial quality equipment to circulate air and remove humidity in between walls, attics and other areas adversely impacted by water damage.
In fact, extraction is just the first step in a long process; drying, deodorizing, disinfecting and removal of all contaminated materials must meet strict guidelines in order to assure the house is returned to normal. (...)
Where are the Bees Going (02/26/2008)
(...) In Europe, they are not finding the bees dead in the hives. The scientist believe that something, pesticides or some other villain is causing the bees to become disoriented and unable to return to the hive. Moreover, without pollen the bees are unable to make honey and whole hives starve. (...)
Human Impact on the Biosphere (01/31/2008)
(...) Ozone depletion. The ozone layer forms in the upper atmosphere when UV radiation reacts
with oxygen (O2) to form ozone (O3). The ozone absorbs UV radiation and thus prevents
it from reaching the surface of the earth where it would damage the DNA of plants
and animals. (...)
Life of Rocks (01/24/2008)
(...) This is called Forst Wedging.
Exfoliation:
Removal of overlaying rocks which causes the underlaying rocks to expand and facture due to pressure release.
Abrasion:
Particles moved by water, ice and air can be affective in wearing away rock. (...)
Biomes (01/22/2008)
(...) However, they receive considerably less water than rain forests.
3. Temperate grasslands receive less water and are subject to lower temperatures than are
savannas. (...)
Biogeochemical Cycles (01/12/2008)
(...) Carbon cycle. Carbon is required for the building of all organic compounds.
• Reservoirs: atmosphere (as CO2), fossil fuels (coal, oil), peat, durable organic material
(cellose, for example). (...)
Human Population Growth (10/29/2007)
(...) Reduction in human wastes. By developing water purification and sewage systems,
health hazards from human wastes were reduced.
4. (...)
Transport of Water (10/29/2007)
(...) The apoplast pathway is blocked by the suberin that permeates the casparian
strip. The endodermal cells allow water to enter the stele (vascular cylinder) but are selective as
to which minerals are allowed to enter. For example, potassium (K+), an essential mineral, is allowed
to pass, while sodium (Na+), common in soils but unused in plants, is blocked. (...)
Ecological Succession (10/23/2007)
(...) Over shorter
periods of time, succession occurs because species that make up communities alter the habitat
by their presence. In both cases, the physical and biological conditions which made the habitat
initially attractive to the resident species may no longer exist, and the habitat may be more favorable
to new species. Some of the changes induced by resident species are listed below:
1. (...)
The Muscular System (10/23/2007)
(...) Nearly the entire volume of the muscle cell is filled with numerous, long myofibrils.
Myofibrils consist of two types of filaments:
• Thin filaments consist of two strands of the globular protein actin arranged in a double
helix. Along the length of the helix are troponin and tropomyosin molecules that
cover special binding sites on the actin. (...)
Embryonic Development (10/16/2007)
(...) Like
other larvae, the pluteus undergoes additional development (metamorphosis) that transforms
the larva into an adult.
In other animals, embryonic development continues until the birth of an infant that resembles
the form of the adult. In mammals, the developmental period is often divided into two stages—
embryonic development followed by fetal development. (...)
Kinds of Animal Behavior (10/10/2007)
(...) However, she will also retrieve any object that resembles her egg, and
once the FAP has begun, she will continue the retrieval motions until she has completed
the motions back to the nest. Even if the egg slips away or is removed, she
completes the FAP by returning an “imaginary” egg to the nest.
• Male stickleback fish defend their territory against other males. (...)
Animal Movement (10/06/2007)
(...) Movement toward light is called
phototaxis.
• Moths move toward lights at night.
• Sharks move toward food when food odors reach them by diffusion or by bulk flow
(ocean currents). (...)
Transport of Sugars (10/06/2007)
(...)
3. Pressure in sieve-tube members at the source moves water and sugars to sieve-tube
members at the sink through sieve tubes. When water enters the sieve-tube members in
the leaves (or other source), pressure builds up because the rigid cell wall does not expand. (...)
The Nervous System (10/04/2007)
(...) Sensory neurons (or afferent neurons) receive the initial stimulus. For example, sensory
neurons embedded in the retina of the eye are stimulated by light, while certain sensory
neurons in the hand are stimulated by touch.
2. (...)
Thermoregulation (10/04/2007)
(...) Cooling by evaporation. Many animals lose heat by sweating. Since changing from a liquid
to gaseous state requires energy (an endergonic reaction), body heat is removed when
water vaporizes. (...)
The Immune System (10/03/2007)
(...) Antimicrobial proteins (such as lysozyme, which breaks down the cell walls of bacteria)
are contained in saliva, tears, and other secretions found on mucus membranes.
3. Cilia that line the lungs serve to sweep invaders out of the lungs. (...)
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