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.
Egg sizes differ between species, from a 3 mm diameter in the grove snail to a 6 mm diameter in the Giant African Land Snail. After 2 to 4 weeks of favorable weather, these eggs hatch and the young emerge. Snails may lay eggs as often as once a month. land snail is a common name for any of the numerous species of snail that live on land, as opposed to those that live in salt water and fresh water. Land snails are terrestrial gastropod mollusks that have shells (those without shells are known as slugs).