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
If there are sperm in the cervix or if the woman has intercourse while the egg is alive at the edge of the fallopian tube, then the sperm will travel to the egg as fast as they can swim. Its not known how sperm sense that a ripe egg is available, but they can reach it in as little as thirty minutes.