When buying eggs you want to make sure the shells are not cracked because it creates an opening that would allow bacteria to enter the egg.
Land dwelling animal's eggs have shells (hard or soft) to keep them from drying out. Fish eggs don't need shells because being in water they won't dry out.
Reptile eggs are soft-shelled so that the babies can break out of the shells. Bird eggs are hard-shelled, because baby birds use their beaks to crack the shells of their eggs, but since reptiles don't have beaks to use to break their shells, their eggs have to be soft-shelled.
Because they have to be soft to live in water.
they could if they wanted to. I guess.
mallards cannot lay eggs because they are males.
are eggs safe when not cracked
Left unprotected, local dogs or raccoons will rob the nest. Sorry.
Land dwelling animal's eggs have shells (hard or soft) to keep them from drying out. Fish eggs don't need shells because being in water they won't dry out.
A dozen eggs are 12 in total so 14 cannot be cracked
Because their shells are weak and gravity.
It lay eggs with shells in the sands
Reptile eggs are soft-shelled so that the babies can break out of the shells. Bird eggs are hard-shelled, because baby birds use their beaks to crack the shells of their eggs, but since reptiles don't have beaks to use to break their shells, their eggs have to be soft-shelled.
2 12 actually because if there were 2 eggs and one was cracked in half than you would only have one and a half! Perhaps ONE whole egg and a chick starting to work its way out into the world.
No they do not have soft shells
Yes. Penguins are birds, and birds reproduce by laying eggs with hard shells. This is different from the eggs of reptiles and monotremes, which have leathery shells.
There are two egg-laying mammals, and they both lay eggs with shells, but the shells are leathery, rather than hard shells, like birds' eggs. The platypus and the echidna are both egg-laying mammals, or monotremes. They are still classified as mammals because they feed their young on mothers' milk - a characteristic unique to mammals alone.
Food-grade ink is required to code on egg shells, because egg shells are porous and chemicals could enter the egg. Also, eggs are often cooked with the shells intact (e.g. hard-boiled); so the consumer could come into contact with the ink while eating the egg. Even when an egg is cracked there is a risk that the egg contents could come into contact with the ink.