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What does a vole look like?

Approximately 155 species of vole exist. Voles belong to the subfamily Arvicolinae, which also includes lemmings and muskrats. The diet of a vole includes a wide variety of small plants, nuts and fruits; scavenging is also an option. Voles are a food source for a diverse selection of predators, such as foxes, cats and owls. Some species of vole are sexually monogamous.

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What are natural resources of India?

Of India's numerous natural resources, coal ranks among the oldest and most lucrative. Coal mining and extraction dates back to the 1770s; since then, India has exported over 30 million tons of coal. India also produces substantial amounts of iron ore, exporting millions of tons annually. India contains rocks and minerals suitable for commercial, residential and aesthetic use too, such as marble and limestone.

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Where does hematopoiesis occur?

Hematopoietic activity starts with the initial formation of blood cells in the yolk sac, which is attached to the embryo. However, there is scientific evidence that the erythroblasts, or immature red blood cells, that emerge from the sac are primitive and not the product of definitive hematopoiesis, as claimed by a study published in the United States National Library of Medicine National Institute of Health by Dr. Kathleen E. McGrath and Dr. James Palis. McGrath and Palis believe that hematopoiesis actually begins in the aorta-gonad-mesonephros, or AGM, of the embryo, where the AGM pluripoten..

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What is the difference between mass and density?

Density is the more practical unit to use when trying to compare two objects or materials. Comparing mass of two objects is typically pointless as they will be different sizes. For example, a small rock may weight less than a full-sized basketball, but if a person had a similarly sized basketball (with the same volume as the rock), the rock would weigh much more; regardless of the size of the rock and basketball, the rock will have a much higher density, even if masses differ.

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What is the main function of the trachea?

The trachea is a hollow tube that lies directly behind the esophagus. It extends down the mid-line of the body and connects to the bronchi of each lung. The trachea delivers air from the mouth and nose into the bronchi for the lungs to expand. While eating, the trachea is covered by the epiglottis to prevent food from entering the trachea and the lungs.

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What are three general characteristics of connective tissues?

The non-cellular component of connective tissue is called the extracellular matrix. This matrix is composed of proteins and sugars that bathe the cells present in the tissues, though the majority of the matrix is water.\nThe three main types of cell found in connective tissue are fibroblasts, macrophages and mast cells. Fibroblasts produce the fibers of the matrix, macrophages scavenge the tissue as an immune cell, while mast cells release heparin and histamine in response to stress.

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What are thermophilic bacteria?

Thermophilic bacteria can be found growing naturally in the hottest places on Earth. Hot springs, volcanoes and geysers are great places for them. They are also found in all types of manure and thrive in compost heaps. It is estimated that 1 trillion bacteria can fit into a single teaspoon of waste material. They are the organisms responsible for the breakdown of organic matter in the compost. Due to the high heat required, and the additional heat they create when eating the materials in the heap, they are the reason for spontaneous compost fires.\nThermophilic bacteria are not only used in ag..

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What is made of platinum?

Platinum is among the most abundant elements on Earth. It is also easy and relatively inexpensive to extract and process, which explains why it is used in so many different industries and products. In many countries where platinum is extracted and produced, jewelry is the primary economic use of platinum. Platinum is used to make necklaces, rings, earrings, bracelets and more. It is a treasured metal used to make wedding and engagement jewelry and is easy to melt and mold in different shapes. Platinum also sees high volumes of use in the scientific industry. Platinum has a high melting point a..

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What does the pons do?

The pons also regulates sleep and is the origin of REM or rapid eye movement sleep, when dreams take place. It allows the body to experience sleep paralysis, which keeps a person from getting up during sleep. Since it is part of the brain stem, the pons also transmits messages between the brain and the spinal cord.\nThe pons contains the nuclei of several cranial nerves. They are the trigeminal nerve, the abducens and facial nerve nuclei and the vestibulocochlear nuclei. These nerves control hearing and balance, the sensations of touch and pain in the face, breathing, the bladder and facial ex..

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What are the different types of magnolia trees?

The cucumber tree is a magnolia that's found in the forests of eastern North America. It's cultivated as an ornamental. The flowers bloom in spring, and the fruit looks somewhat like a cucumber when it's young and green.\nThe Yulan is native to China. It's a deciduous tree that's also grown as an ornamental. It is often seen around temples. The buds open early, and the flowers are pure white.\nThe evergreen magnolia is also called the southern magnolia or the bull bay. It's found in the southern United States and is grown not only for its glossy, dark green leaves..

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