What determines the sex of the embryo in reptiles? Detailed answer

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What determines the sex of the embryo in reptiles? Detailed answer

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What determines the sex of the embryo in reptiles?

In many reptiles, the sex of the embryo growing in the egg is determined not by the chromosomes of the parents, but by the ambient temperature. In this case, the dependence in different species may be opposite. In turtles, at temperatures below a certain value, only males hatch, and in lizards, only females.

Authors: Jimmy Wales, Larry Sanger

Random interesting fact from the Great Encyclopedia:

What is the Industrial Revolution?

Man has been living on Earth for a very, very long time. But throughout its long history, the biggest changes in daily life have only occurred in the last 200 years! These changes in lifestyle and work are based on the improvement of machines. This significant period is called the "industrial revolution".

Since its inception, man has been constantly creating tools. Then came the machines. It wasn't until 1750 that a real machine was invented. A machine is also a tool of labor, but it does almost all the work, frees a person from energy costs. This transition from tools to mechanized machines was so important, so significant, that it affected every aspect of life. This example shows how one invention leads to another.

To get the most out of machines, new energy sources had to be found. Before the industrial revolution, only the power of human muscles, animals, the power of wind and water was used. To use the machines that man invented, a new source was discovered - steam. This allowed factories to be built. They were close to raw materials and the market. With the further development of machine tools and mechanisms, more and more iron and steel were required. And so there was a need for new methods of mining.

Machines could produce more goods that needed to be sold. So, it was necessary to improve their transportation to the market. This led to the need for better roads, the construction of canals, the development of rail transport, and the construction of large ships and steamships to transport the created goods to distant markets.

Man began to deal with markets around the world, the role of communications increased. The telephone and telegraph were invented. But more changes were needed. Factories grew, they used large and expensive machines, and a person could no longer work at home. He began to do this in factories and plants. This led to a division of labor, a man in a factory performing only one operation throughout the day, while at home he was forced to produce a product completely.

After all, the industrial revolution made it possible to produce simple and cheap products available to everyone.

Test your knowledge! Did you know...

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SAMSUNG introduced the first DVD recorders 15.03.2005

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The "Smart RP" processor has been specially developed for Samsung's new recorders, allowing recording to start at the touch of a button. The DVD-R100E and R100EA models open the line. Next comes the DVD-VR300 combo recorder. The DVD-R100 and DVD-R100EA models differ only in the different front panel design and support for the Show View function in the latest model (100EA).

The second model is DVD-VR300. The main feature of this device is the possibility of two-sided copying between DVD and VHS.

On store shelves, these models will be available at a price of about $400 for the R100 and $500 for the VR300.

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