Science

Refine Search

What characteristics do tundra animals have?

The tundra is characterized by permafrost, which means that only a relatively shallow layer of soil thaws during the summer. Below that, the soil is permanently frozen. The extreme temperatures and long winters that cause this mean that animals must be well-suited for cold. Many tundra animals have white or light brown coats to help them blend into the winter landscape. Tundra mammals have thick coats, and many have a double coat. This means they have both a thick fluffy undercoat to trap warm air near the body and long slick outer hairs that help water and snow slide off the body.\nTundra ani..

Continue Reading

What are conversion factors in chemistry?

SparkNotes further defines a conversion factor as a fraction or ratio that represents the ratio between two distinct units and is always equal to one. The numerator and the denominator are equal with the only difference being that they are expressed differently. Since it is always equal to one, multiplying this ratio using the original value only changes its unit but not its value. According to Education.com, conversion factors come in handy when comparing two measurements that are not expressed in the same units. For instance, it's possible to use conversion factors to solve a measuremen..

Continue Reading

What eats stink bugs?

As stink bugs are harmful to crops, scientists search for methods to keep the stink bug population under control. Research specialists hold both the Trissolcus wasp and stink bugs in facilities to test the potential for predator-prey control. Scientific experiments reveal few native parasites that can find and kill stink bugs.\nThe stink bug is also known as the brown marmorated stink bug. The insect was introduced to the U.S. in 1996, and the first specimen was collected in September 1998. It is a sucking insect that feeds on fruits and vegetables by piercing the plant and sucking out its jui..

Continue Reading

Why aren't acinar cells digested?

Acinar cells are one of the two cells that make up the exocrine pancreas, a gland that secretes digestive enzymes into the intestines, notes Pancreas.org. The other cells of the exocrine pancreas are called duct cells. Acinar cells produce enzymes that turn vegetables, meat and other foods into a liquid. In order to avoid self-digestion, these cells produce digestive enzymes in an inert form known as zymogens; these are eventually converted into an active form called trypsin upon reaching the small intestines.\nFurther protection from self-digestion is provided by a trypsin inhibitor produced ..

Continue Reading

What is the definition of "gaseous waste"?

Most human activity results in some form of waste. Gaseous waste can be anything from the gas expelled in a burp to the exhaust from a car's engine.\nHow waste is disposed is of vital importance to many people and organizations around the world. Hazardous waste that is discarded without proper containment leads to major biological and environmental hazards.

Continue Reading

What is a list of biodegradable materials?

Lists available online allow users to search for biodegradable materials in different ways, including by manufacturer, manufacturer's field, product type and product name. This variety affords users many opportunities to locate and compare materials. The EPA's website contains links to its own lists and research as well as lists compiled by other credible organizations. The Center for Microbial Oceanography: Research and Education website has a list of materials that aren't biodegradable along with the time it takes them to break down in a marine environment.

Continue Reading

What are the isomers for butyne?

Ethylacetylene is another name for 1-butyne. It's a very flammable but colorless gas. One of its isomers, 2-butyne, is a man-made, volatile liquid.\n1-methylcyclopropene is a gas that is related to ethylene. It is used to retard the ripening of plants, including fruits and cut-flowers. This allows them to be shipped long distances without wilting or overripening.\nMethylenecyclopropane is a colorless gas. It's used as a reagent, which means that it's a substance used to affect some kind of transformation or chemical reaction on a system.\n1,3-butadiene is also a colorless gas wi..

Continue Reading

How do bacteria obtain food?

Many types of bacteria are able to eat a variety of things like milk, meat, oil and gas. Some bacteria live in the digestive tracts of humans and other animals and assist the body by helping to digest food and eating other, harmful bacteria. Escherichia coli, more commonly known as E. coli, is one bacteria that lives in the human body and survives by digesting food, absorbing some of the nutrients and releasing vitamin K. The harmful version of the E. coli bacteria causes people to become sick when ingested.In order to eat, some bacteria absorb food through their cell walls. Many are autotr..

Continue Reading

What is the function of precentral gyrus?

The precentral gyrus is also referred to as the primary motor area or primary motor cortex, although is most commonly identified as the motor strip. It is located in the frontal lobe and on both sides of the brain. The planning of movements occurs in various areas of the frontal lobe, but all information is sent to the motor strip prior to performance. The left side of the motor strip controls all movement on the right side of body, while the right side controls all movement on the left.\nAlong the motor strip, which travels from the top of the head to the ear, are small areas of varying size ..

Continue Reading

Why is the pH of distilled water not 7.0?

Distilled water is often exposed to carbon dioxide in the air at some point during the distilling process. Pure water is 7.0 and completely neutral, but distilled water sources can get as low as 5.5 on the pH scale. This level of acidity is not generally a threat, but it can dissolve light metals like copper. This is why copper is not a good material for conveying water through pipes; if a light metal is used in conveying water, if that water becomes even as acidic as a pH of 5.5, pieces of the copper may end up getting dissolved by the water, becoming a part of it. Consumers could then drink ..

Continue Reading
Showing 431 to 440 of 10000 (1000 Pages)