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How do moose sleep?

Encounters North explains that moose can be very vulnerable to predators, such as wolves and humans, when traveling through or sleeping on deep snow. Accordingly, moose often choose to lie down directly on trails on which they have been travelling. This is thought to be an adaptation that allows them to smell predators before they get too close.

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What are the most common prokaryotes?

Organisms in both prokaryotic domains survive in a variety of conditions, including some of the coldest and hottest environments on Earth. Bacteria are among the most diverse and abundant organisms on Earth. They live in oceans, the soil and in digestive tracts of most living organisms, including plants, animals and humans. Bacteria are located in rocks far below the surface of the Earth, and in the aggregate, have a population exceeding five trillion. Bacteria may be benign or malignant, and are responsible for maintaining optimal health as well as spreading disease. In this domain, cyanobact..

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What is the maximum volume of water that can flow in a 1-inch diameter pipe?

A 1-inch PVC pipe allows for a wide range of flow variation. At a low flow velocity of 6 feet per second, water moves through the pipe at 16 gallons per minute, or 960 gallons an hour. Average flow velocity of 12 feet per second passes 37 gallons per minutes, or 2,220 gallongs per hour. These flow rates depend on variables such as bends, fittings, pressure and viscosity. For example, as the number of bends and fittings increases, the flow rate decreases.

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What does the cardiovascular system do?

The cardiovascular system, also called the circulatory system, moves blood to parts of the body where it can be oxygenated and where waste can be disposed. The newly oxygenated blood is then brought to the tissues of the body. Blood flows through the liver and kidneys, where waste is removed and then brought back to the lungs for fresh oxygen. This process of blood flow continues over and over.\nHumans and mammals have four-chambered hearts, which ensures highly oxygenated blood is moved quickly and efficiently to the organs of the body, About.com states. The upper chambers of the heart, calle..

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What is the advantage of having muscles that run at different angles in the stomach?

The outermost longitudinal layer of the mucularis lies along the length of the stomach. It parts into two bands at the center of the stomach, and it rejoins near the pylorus at the bottom of the stomach. The middle circular layer, which is the thickest and strongest, wraps around the entire stomach, including the pylorus, where it forms the pyloric sphincter. Usually in a constricted state, the movement of this muscle propels the stomach's contents, called chyme, into the duodenum, or the top of the small intestine. Unique to the stomach, the innermost muscle layer lies in an oblique dir..

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What is an example of passive immunity?

Another example of passive immunity takes place when newborns drink colostrum from their mother. Colostrum contains antibodies to protect the newborn in the first few weeks of life before they are able to produce their own antibodies.\nAn advantage of passive immunity is that protection begins quickly, often within hours. A disadvantage is that the protection is short term.

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What are the differences between reptiles?

Tuataras are living fossils that have remained virtually unchanged for millions of years. Known only from New Zealand, tuataras resemble lizards, but they have many subtle anatomical differences. For example, tuataras have well-developed parietal eyes and they have different reproductive structures than lizards do.\nLizards are the largest grouping of reptiles. Including snakes, they are represented by over 9,000 species. Lizards and snakes differ in a number of ways, but for all of the differences there are exceptions. For instance, while snakes lack legs, some lizards lack legs as well. Snak..

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What is the difference between transparent and translucent?

Light can pass through things that are translucent, but if any image shows through at all, it is distorted. Examples of translucent items are glass block windows and dark stained glass, and some seafood, such as shrimp, when it is properly cooked. Other examples of transparent, or see-through items, are the plastic wrap used to wrap food for storage. These terms can also be used to describe a person's actions. For example, someone who is visibly dishonest is said, as an insult, to be transparent, in the sense that the speaker knows about the dishonesty.

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What happens to a gas tank with salt?

A car with salt or sugar added to the gas tank requires a deep cleaning of the fuel tank and replacement of the fuel pump and filtration system.\nPeople have tried similar tricks with sand or golf balls. The sand is not as damaging because it is heavier than salt or sugar and sinks to the bottom of the fuel tank, but golf balls are very damaging because the fuel tank causes the balls to unravel.

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Where does a cell membrane come into contact with water?

Both animal and plant cells contain vacuoles. In plant cells, vacuoles may function as storage areas for water. These storage areas also provide the food and other nutrients necessary for a plant's survival. Another function of the vacuole is to hold waste products and break it down. In regards to the difference in the vacuole size of plant and animal cells, plants cells have bigger vacuoles.

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