An introduction to leaf structure
By: David Thackston
The structure of leaves has evolved over time to make the maximum use of the plant's surface space in order to produce the nutrients that the plant needs in order to survive. Within the leaves photosynthesis takes place, which produces glucose, an energy source for...
By: Dr. Bryan Katz
The human body is composed of trillions of cells and their products. The cell represents the most basic level of structure and function. From there, the level of organization increases in complexity to tissues, organs, organ systems and, ultimately, the organism as a total package...
Why spiders don't stick to their webs
By: BerylM
Of course, not all spiders spin webs – but anyone who has accidentally walked into one of the masses of gossamer strands built by one that does, will be able to testify that they are definitely sticky – and the hapless moths, flies and other...
What is the chromosomal theory of inheritance?
By: Christyl Rivers
Prior to 1902, many biologists suspected that chromosomes were responsible for delivery of the genetic materials that every organism has. But it fell to Theodor Boveri and Walter Sutton, working independently, to discover what is now called the chromosomal theory of inheritance. Basically, they found...
An introduction to leaf structure
By: BerylM
Leaves are the parts of a plant that carry out photosynthesis, the process where light and carbon dioxide are absorbed and converted, with the addition of water, into glucose and oxygen. The plant uses the glucose and expels the oxygen as a waste product &ndash...
By: Heather Brennan
The chromosomal theory of inheritance is also known as the Sutton-Boveri chromosome theory. It was developed simultaneously by William Sutton and Theodor Boveri in 1902. This theory confirmed Mendel’s laws that came out of his work with garden peas and established genes as units...
By: Colette Georgii
Photosynthesis is a complex process whereby plants, algae and some bacteria receive energy from the sun. The energy from sunlight is used to synthesize carbon dioxide and water into glucose and oxygen. Photosynthesis converts electromagnetic energy from sunlight into a chemical energy stored in glucose...
By: Retha Boswell
The Moreton Bay Pine (Araucaria cunninghamii), Hoop Pine, or Colonial Pine is a large evergreen conifer reaching about 60 meters (200 feet) in height. It is native to Australia, found mainly in coastal rainforest regions of northern New South Wales to northern Queensland, as well...
By: Christyl Rivers
In the mid-20th century, biologists found that linear sequences of genes located on specific sites of chromosomes are what drive the laws of inheritance. Here is one example: If both of one’s parents have blue eyes, both parents carry the right genetic instructions on...
By: Retha Boswell
The Bunya Bunya Tree (Araucaria bidwillii) is a large tropical evergreen also known as the False Monkey Puzzle Tree and the Bunya Pine, or simply the Bunya. The species is native to coastal rain forest regions of Queensland, Australia, where they grow in volcanic soil...

 

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