Centering a block or image. Sometimes it is not the text that needs to be centered, but the block as a whole. Or, phrased differently: we want the left and right margin to be equal. The way to do that is to set the margins to 'auto'.In case of a browser, that means the browser window). So centering an element in the viewport is very simple. Here is a complete example. (This example uses HTML5 syntax.). You can see the result in a separate document. The 'margin-right: -50%' is needed to compensate the 'left: 50%'.
Slugs and snails share many similar features. However, the most apparent difference between the two is that snails carry coiled shells on their backs whereas slugs do not contain these shells. A shell of snail is composed of calcium carbonate and it keeps growing with the growth of snail.Both produce mucous for retaining the moisture.owever, the most apparent difference between the two is that snails carry coiled shells on their backs whereas slugs do not contain these shells. A shell of snail is composed of calcium carbonate and it keeps growing with the growth of snail. Both produce mucous for retaining the moisture.
Slugs and snails are molluscs, like oysters and clams. They are both similar in structure, except that the snail is protected by a hard shell that makes it less vulnerable than slugs to dry conditions and the sun.Slugs and snails have a soft, unsegmented body that is 2 to 4 cm (.79 to 1.5 inches) long.The head has one or two pairs of tentacles. The front tentacles are sensitive to odours and sometimes taste, while each of the larger back tentacles have an eye at the end.lugs and snails are known as gastropods, which means stomach foot.. The foot located on the stomach is how they move around. Slugs and snails are also hermaphrodites, with both male and female organs.