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 an egg is present and ready to be fertilized, the woman will become pregnant. In general, the fastest sperm can swim to the womanâs eggs within 30 minutes. Slower sperm take up to several days to reach the eggs. On average, sperm will only live in the female reproductive organs for about 48 hours to 72 hours. After this time period, they begin to die out. Although millions of sperm may enter the womanâs body, only a few hundred or less will actually reach the egg.