Egg-Laying Sharks. Of the approximately 400 species of sharks, about 40% lay eggs. This is called oviparity. When the eggs are laid, they are in a protective egg case (which sometimes washes up on the beach and is commonly called a mermaid's purse).
what s the truth i am asking this b c there seems to be posts on here that say y sperm swim faster which is what we all prob have heard for the longest time but there have been some recent posts on here that state newer studies now say y sperm aren t any faster than x and they can both swim just as fast so im just wanting to know which one is true if anyone really knows thanks
exists and is an alternate of . Truth is knowledge of things as they really are, as they really were and as they really will be. Studies show that the sperm that produce female offspring (aka girl babies) swim more slowly than the sperm that produce male offspring, but they are also hardier. This means that boy sperm swim fast but die faster and girl sperm swim more slowly but last longer.