What marsupials do not have a bag? Detailed answer

BIG ENCYCLOPEDIA FOR CHILDREN AND ADULTS
Free library / Directory / Big encyclopedia for children and adults

What marsupials do not have a bag? Detailed answer

Big encyclopedia for children and adults

Directory / Big encyclopedia. Questions for quiz and self-education

Did you know?

What marsupials do not have a bag?

The main difference between marsupials and placentals is the too simple structure or the absence of a placenta at all, which could protect the embryo from the mother's immune system. That is why marsupial cubs are born very premature, climb into the bag and continue to develop, receiving milk from the mother's nipples. However, not all female animals of the marsupial cohort have this very bag - these include marsupial anteaters and some species of opossums. Their cubs hang on the nipples, clinging to the mother's fur.

Authors: Jimmy Wales, Larry Sanger

Random interesting fact from the Great Encyclopedia:

Which animals showed a positive effect after receiving a placebo?

The placebo effect affects not only people, but also animals. In a control group of epileptic dogs given pacifiers, seizures decreased in 79% of the participants. Scientists suggest that the improvement in the condition is due either to the expectation of the dogs themselves, accustomed to drugs for many years of illness, or the expectation of their owners, conveying to the animals confidence in the benefits of treatment. Also, a more prosaic explanation related to the cyclical nature of epilepsy cannot be ruled out: since the placebo may occur during the exacerbation phase, after some time the seizures become less due to natural causes.

Test your knowledge! Did you know...

▪ What are the top ten lakes in the world in terms of water surface area?

▪ How much is a square kilometer of the earth worth?

▪ Why do Acanthaspis petax bugs carry many ant corpses on their backs?

See other articles Section Big encyclopedia. Questions for quiz and self-education.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

The existence of an entropy rule for quantum entanglement has been proven 09.05.2024

Quantum mechanics continues to amaze us with its mysterious phenomena and unexpected discoveries. Recently, Bartosz Regula from the RIKEN Center for Quantum Computing and Ludovico Lamy from the University of Amsterdam presented a new discovery that concerns quantum entanglement and its relation to entropy. Quantum entanglement plays an important role in modern quantum information science and technology. However, the complexity of its structure makes understanding and managing it challenging. Regulus and Lamy's discovery shows that quantum entanglement follows an entropy rule similar to that for classical systems. This discovery opens new perspectives in the field of quantum information science and technology, deepening our understanding of quantum entanglement and its connection to thermodynamics. The results of the study indicate the possibility of reversibility of entanglement transformations, which could greatly simplify their use in various quantum technologies. Opening a new rule ... >>

Mini air conditioner Sony Reon Pocket 5 09.05.2024

Summer is a time for relaxation and travel, but often the heat can turn this time into an unbearable torment. Meet a new product from Sony - the Reon Pocket 5 mini-air conditioner, which promises to make summer more comfortable for its users. Sony has introduced a unique device - the Reon Pocket 5 mini-conditioner, which provides body cooling on hot days. With it, users can enjoy coolness anytime, anywhere by simply wearing it around their neck. This mini air conditioner is equipped with automatic adjustment of operating modes, as well as temperature and humidity sensors. Thanks to innovative technologies, Reon Pocket 5 adjusts its operation depending on the user's activity and environmental conditions. Users can easily adjust the temperature using a dedicated mobile app connected via Bluetooth. Additionally, specially designed T-shirts and shorts are available for convenience, to which a mini air conditioner can be attached. The device can oh ... >>

Energy from space for Starship 08.05.2024

Producing solar energy in space is becoming more feasible with the advent of new technologies and the development of space programs. The head of the startup Virtus Solis shared his vision of using SpaceX's Starship to create orbital power plants capable of powering the Earth. Startup Virtus Solis has unveiled an ambitious project to create orbital power plants using SpaceX's Starship. This idea could significantly change the field of solar energy production, making it more accessible and cheaper. The core of the startup's plan is to reduce the cost of launching satellites into space using Starship. This technological breakthrough is expected to make solar energy production in space more competitive with traditional energy sources. Virtual Solis plans to build large photovoltaic panels in orbit, using Starship to deliver the necessary equipment. However, one of the key challenges ... >>

Random news from the Archive

Self-healing concrete 19.03.2020

Scientists from the US state of Colorado, using bacteria, have created a "living" concrete that can self-repair. Concrete is the backbone of urban planning all over the world. Unfortunately, the varieties of concrete that exist today are destroyed sooner or later.

According to American scientists, the new material is a mixture of sand, which regularly feeds the composition with hydrogel liquid and bacteria of the genus Synechococcus. The gel-like mass provides the microbes with the substances necessary for growth, and as they develop, they produce calcium carbonate. It is this substance that gives the material its strength.

The composition created by the Americans with bacteria, under certain conditions, is able to fully recover. For example, if a brick created using a new technology is broken, it can be regrown by dousing it with a mixture of hydrogel and sand.

Under the influence of the sun and nutrients from the hydrogel, the bacteria literally come to life and help the brick to return to its original shape. The resulting material is as strong as concrete. However, in conditions that are too dry, bacteria can die and the bricks can lose their self-healing properties.

Other interesting news:

▪ Coda electric car travels 150-200 km

▪ Samsung fuel cells for players

▪ Motorola Keylink with Bluetooth Beacon

▪ Electronic collars for dog training

▪ Female hormone protects against influenza complications

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the site Reference materials. Article selection

▪ article Every warrior must understand his maneuver. Popular expression

▪ article In which country can older people increase the green time at traffic lights? Detailed answer

▪ article The use of bleach for disinfection of industrial premises. Standard instruction on labor protection

▪ article Digital frequency converter. Encyclopedia of radio electronics and electrical engineering

▪ article Miracle artist. Focus Secret

Leave your comment on this article:

All languages of this page

Home page | Library | Articles | Website map | Site Reviews